$89+ Cheap flights from Boston (BOS) to San Juan
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 4/29. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — SJU
May 3 — May 101
Round-trip
1 adult, Economy
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Find cheap flights from Boston to San Juan with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheapflights Tip: The best prices from Boston Logan Intl to San Juan are usually found in January or October, booked 47 days in advance, depart on a Wednesday or Sunday and return on a Thursday
Cheap flight deals from Boston to San Juan
Cheapest
Best
Last-minute
One-way
Cheapest flights from Boston to San JuanExplore the most affordable flight options available from Boston to San Juan. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 3, 2026.
Explore the most affordable flight options available from Boston to San Juan. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 3, 2026.
This Kiwi.com deal was found by Cheapflights users on 3/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/63:23 pm
BOS
- SJU
Nonstop3h 56m
Multiple Airlines
Thu 4/96:00 am
SJU
- BOS
Nonstop4h 16m
Multiple Airlines
Deal found 3/29![Multiple Airlines logo]()
$154
This Priceline deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/911:18 am
BOS
- SJU
Nonstop3h 59m
Multiple Airlines
Fri 4/101:45 am
SJU
- BOS
1 stop8h 09m
Multiple Airlines
Deal found 3/31![Multiple Airlines logo]()
$156
This Kiwi.com deal was found by Cheapflights users on 3/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/911:18 am
BOS
- SJU
Nonstop3h 59m
Multiple Airlines
Tue 4/142:59 am
SJU
- BOS
1 stop7h 30m
Multiple Airlines
Deal found 3/30![Multiple Airlines logo]()
$157
This CheapOair deal was found by Cheapflights users on 3/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/316:01 am
BOS
- SJU
1 stop17h 57m
Spirit Airlines
Sat 4/1110:00 am
SJU
- BOS
Nonstop4h 18m
Spirit Airlines
Deal found 3/30![Spirit Airlines logo]()
$158
This Kiwi.com deal was found by Cheapflights users on 3/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/211:18 am
BOS
- SJU
Nonstop3h 59m
Multiple Airlines
Sat 4/410:00 am
SJU
- BOS
Nonstop4h 18m
Multiple Airlines
Deal found 3/29![Multiple Airlines logo]()
$159
This Frontier deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/911:18 am
BOS
- SJU
Nonstop3h 59m
Frontier
Fri 4/173:08 am
SJU
- BOS
1 stop7h 13m
Frontier
Deal found 3/31![Frontier logo]()
$160
This Kiwi.com deal was found by Cheapflights users on 3/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/63:23 pm
BOS
- SJU
Nonstop3h 56m
Spirit Airlines
Sat 4/1110:00 am
SJU
- BOS
Nonstop4h 18m
Spirit Airlines
Deal found 3/29![Spirit Airlines logo]()
$161
This Kiwi.com deal was found by Cheapflights users on 3/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/711:18 am
BOS
- SJU
Nonstop3h 59m
Multiple Airlines
Fri 4/101:45 am
SJU
- BOS
1 stop8h 09m
Multiple Airlines
Deal found 3/29![Multiple Airlines logo]()
$162
This Travelocity deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/911:18 am
BOS
- SJU
Nonstop3h 59m
Multiple Airlines
Thu 4/1610:25 am
SJU
- BOS
Nonstop4h 07m
Multiple Airlines
Deal found 3/31![Multiple Airlines logo]()
$163
This Kiwi.com deal was found by Cheapflights users on 3/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/211:18 am
BOS
- SJU
Nonstop3h 59m
Frontier
Sat 4/46:00 am
SJU
- BOS
Nonstop4h 16m
Frontier
Deal found 3/29![Frontier logo]()
$165
This eDestinos deal was found by Cheapflights users on 3/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/74:23 pm
BOS
- SJU
1 stop16h 30m
Spirit Airlines
Thu 4/910:00 am
SJU
- BOS
Nonstop4h 18m
Spirit Airlines
Deal found 3/30![Spirit Airlines logo]()
$167
Best flights from Boston to San JuanDiscover carefully curated flight deals from Boston to San Juan that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 3, 2026.
Discover carefully curated flight deals from Boston to San Juan that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 3, 2026.
This Delta deal was found by Cheapflights users on 4/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/301:29 pm
BOS
- SJU
1 stop10h 06m
Delta
Fri 6/52:00 pm
SJU
- BOS
Nonstop4h 18m
Delta
Deal found 4/1![Delta logo]()
$308
This United Airlines deal was found by Cheapflights users on 3/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/276:00 am
BOS
- SJU
1 stop7h 45m
United Airlines
Fri 10/21:05 am
SJU
- BOS
1 stop7h 41m
United Airlines
Deal found 3/30![United Airlines logo]()
$312
This Southwest deal was found by Cheapflights users on 4/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/127:35 am
BOS
- SJU
2 stops10h 35m
Southwest
Fri 5/1510:00 am
SJU
- BOS
2 stops11h 50m
Southwest
Deal found 4/2![Southwest logo]()
$384
This Delta deal was found by Cheapflights users on 4/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/45:30 am
BOS
- SJU
1 stop7h 24m
Delta
Sat 7/112:05 pm
SJU
- BOS
1 stop9h 54m
Delta
Deal found 4/1![Delta logo]()
$312
This United Airlines deal was found by Cheapflights users on 4/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/317:30 am
BOS
- SJU
1 stop6h 15m
United Airlines
Fri 6/51:25 pm
SJU
- BOS
1 stop8h 28m
United Airlines
Deal found 4/2![United Airlines logo]()
$312
This Delta deal was found by Cheapflights users on 3/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/98:50 am
BOS
- SJU
Nonstop4h 03m
Delta
Thu 7/162:03 pm
SJU
- BOS
Nonstop4h 07m
Delta
Deal found 3/29![Delta logo]()
$350
This Delta deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/238:50 am
BOS
- SJU
Nonstop4h 03m
Delta
Sat 8/12:03 pm
SJU
- BOS
Nonstop4h 07m
Delta
Deal found 3/31![Delta logo]()
$350
This Delta deal was found by Cheapflights users on 4/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/168:50 am
BOS
- SJU
Nonstop4h 04m
Delta
Thu 6/252:05 pm
SJU
- BOS
Nonstop4h 09m
Delta
Deal found 4/1![Delta logo]()
$350
This Delta deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/316:00 am
BOS
- SJU
1 stop10h 29m
Delta
Sat 6/62:00 pm
SJU
- BOS
Nonstop4h 18m
Delta
Deal found 3/31![Delta logo]()
$355
This Delta deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/309:05 am
BOS
- SJU
1 stop7h 26m
Delta
Thu 10/87:00 am
SJU
- BOS
1 stop8h 22m
Delta
Deal found 3/31![Delta logo]()
$359
This Delta deal was found by Cheapflights users on 3/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/48:50 am
BOS
- SJU
Nonstop3h 59m
Delta
Sun 6/72:05 pm
SJU
- BOS
Nonstop4h 09m
Delta
Deal found 3/29![Delta logo]()
$397
This Delta deal was found by Cheapflights users on 4/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/175:40 am
BOS
- SJU
1 stop7h 15m
Delta
Sat 7/256:00 am
SJU
- BOS
1 stop12h 00m
Delta
Deal found 4/2![Delta logo]()
$406
Last-minute flights from Boston to San JuanDiscover last-minute flight deals from Boston to San Juan. Data last updated April 3, 2026 and is based on user searches.
Discover last-minute flight deals from Boston to San Juan. Data last updated April 3, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 3/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/211:18 am
BOS
- SJU
Nonstop3h 59m
Multiple Airlines
Sat 4/410:00 am
SJU
- BOS
Nonstop4h 18m
Multiple Airlines
Deal found 3/29![Multiple Airlines logo]()
$159
This Kiwi.com deal was found by Cheapflights users on 3/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/211:18 am
BOS
- SJU
Nonstop3h 59m
Frontier
Sat 4/46:00 am
SJU
- BOS
Nonstop4h 16m
Frontier
Deal found 3/29![Frontier logo]()
$165
This Kiwi.com deal was found by Cheapflights users on 3/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/63:23 pm
BOS
- SJU
Nonstop3h 56m
Multiple Airlines
Thu 4/96:00 am
SJU
- BOS
Nonstop4h 16m
Multiple Airlines
Deal found 3/29![Multiple Airlines logo]()
$154
This Kiwi.com deal was found by Cheapflights users on 3/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/63:23 pm
BOS
- SJU
Nonstop3h 56m
Spirit Airlines
Sat 4/1110:00 am
SJU
- BOS
Nonstop4h 18m
Spirit Airlines
Deal found 3/29![Spirit Airlines logo]()
$161
This Kiwi.com deal was found by Cheapflights users on 3/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/711:18 am
BOS
- SJU
Nonstop3h 59m
Multiple Airlines
Fri 4/101:45 am
SJU
- BOS
1 stop8h 09m
Multiple Airlines
Deal found 3/29![Multiple Airlines logo]()
$162
This eDestinos deal was found by Cheapflights users on 3/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/74:23 pm
BOS
- SJU
1 stop16h 30m
Spirit Airlines
Thu 4/910:00 am
SJU
- BOS
Nonstop4h 18m
Spirit Airlines
Deal found 3/30![Spirit Airlines logo]()
$167
This Priceline deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/911:18 am
BOS
- SJU
Nonstop3h 59m
Multiple Airlines
Fri 4/101:45 am
SJU
- BOS
1 stop8h 09m
Multiple Airlines
Deal found 3/31![Multiple Airlines logo]()
$156
This Kiwi.com deal was found by Cheapflights users on 3/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/911:18 am
BOS
- SJU
Nonstop3h 59m
Multiple Airlines
Tue 4/142:59 am
SJU
- BOS
1 stop7h 30m
Multiple Airlines
Deal found 3/30![Multiple Airlines logo]()
$157
This CheapOair deal was found by Cheapflights users on 3/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/911:18 am
BOS
- SJU
Nonstop3h 59m
Multiple Airlines
Tue 4/1410:00 am
SJU
- BOS
Nonstop4h 18m
Multiple Airlines
Deal found 3/30![Multiple Airlines logo]()
$158
This Frontier deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/911:18 am
BOS
- SJU
Nonstop3h 59m
Frontier
Fri 4/173:08 am
SJU
- BOS
1 stop7h 13m
Frontier
Deal found 3/31![Frontier logo]()
$160
This Travelocity deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/911:18 am
BOS
- SJU
Nonstop3h 59m
Multiple Airlines
Thu 4/1610:25 am
SJU
- BOS
Nonstop4h 07m
Multiple Airlines
Deal found 3/31![Multiple Airlines logo]()
$163
One-way flights from Boston to San JuanSearch for one-way flight options from Boston to San Juan. Find affordable one-way fares based on user searches. Data last updated April 3, 2026.
Search for one-way flight options from Boston to San Juan. Find affordable one-way fares based on user searches. Data last updated April 3, 2026.
This eDestinos deal was found by Cheapflights users on 3/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/2911:16 am
BOS
- SJU
1 stop11h 32m
Frontier
Deal found 3/29![Frontier logo]()
$89
This Super.com deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/83:23 pm
BOS
- SJU
Nonstop3h 56m
Spirit Airlines
Deal found 3/31![Spirit Airlines logo]()
$90
This Super.com deal was found by Cheapflights users on 4/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/2211:20 am
BOS
- SJU
1 stop13h 38m
Spirit Airlines
Deal found 4/1![Spirit Airlines logo]()
$93
This CheapOair deal was found by Cheapflights users on 4/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/2811:16 am
BOS
- SJU
1 stop14h 45m
Frontier
Deal found 4/1![Frontier logo]()
$94
This eDestinos deal was found by Cheapflights users on 3/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/206:00 am
BOS
- SJU
1 stop8h 13m
Frontier
Deal found 3/30![Frontier logo]()
$96
This Super.com deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/1210:07 am
BOS
- SJU
1 stop16h 01m
Frontier
Deal found 3/31![Frontier logo]()
$97
This Frontier deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/119:57 am
BOS
- SJU
1 stop7h 17m
Frontier
Deal found 3/31![Frontier logo]()
$98
This Cheapflightsfares deal was found by Cheapflights users on 3/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/282:12 pm
BOS
- SJU
Nonstop3h 54m
Spirit Airlines
Deal found 3/29![Spirit Airlines logo]()
$100
This Expedia deal was found by Cheapflights users on 4/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/242:12 pm
BOS
- SJU
Nonstop3h 54m
Spirit Airlines
Deal found 4/1![Spirit Airlines logo]()
$101
This Kiwi.com deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/216:00 pm
BOS
- SJU
1 stop23h 59m
Multiple Airlines
Deal found 3/31![Multiple Airlines logo]()
$102
Find flight deals from Boston to San Juan
Discover tips and strategies to find the most affordable flight options for your journey from Boston (BOS) to San Juan (PR1). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated April 3, 2026.
Round-trip from | $168 (eDestinos) |
|---|---|
One-way from | $89 (eDestinos) |
Popular in | December |
Cheapest in | January |
Average price | $312 |
Cheapflights Fare Finder
Customize your flight search to find flights from Boston to San Juan that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated April 3, 2026.
Use the filters below to find and compare flights from Boston to San Juan that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
BostonSan Juan
BOS - SJU
BOSSJU
Boston Logan Intl
Sat 5/30
1:29 pm-11:35 pm
1 stop10h 06m
San Juan Luis Munoz Marin Intl
Fri 6/5
2:00 pm-6:18 pm
Nonstop4h 18m
$308
BostonSan Juan
BOS - SJU
BOSSJU
Boston Logan Intl
Sun 9/27
6:00 am-1:45 pm
1 stop7h 45m
San Juan Luis Munoz Marin Intl
Fri 10/2
1:05 am-8:46 am
1 stop7h 41m
$312
BostonSan Juan
BOS - SJU
BOSSJU
Boston Logan Intl
Sat 7/4
5:30 am-12:54 pm
1 stop7h 24m
San Juan Luis Munoz Marin Intl
Sat 7/11
2:05 pm-11:59 pm
1 stop9h 54m
$312
BostonSan Juan
BOS - SJU
BOSSJU
Boston Logan Intl
Sun 5/31
7:30 am-1:45 pm
1 stop6h 15m
San Juan Luis Munoz Marin Intl
Fri 6/5
1:25 pm-9:53 pm
1 stop8h 28m
$312
BostonSan Juan
BOS - SJU
BOSSJU
Boston Logan Intl
Thu 7/9
8:50 am-12:53 pm
Nonstop4h 03m
San Juan Luis Munoz Marin Intl
Thu 7/16
2:03 pm-6:10 pm
Nonstop4h 07m
$350
BostonSan Juan
BOS - SJU
BOSSJU
Boston Logan Intl
Thu 7/23
8:50 am-12:53 pm
Nonstop4h 03m
San Juan Luis Munoz Marin Intl
Sat 8/1
2:03 pm-6:10 pm
Nonstop4h 07m
$350
BostonSan Juan
BOS - SJU
BOSSJU
Boston Logan Intl
Tue 6/16
8:50 am-12:54 pm
Nonstop4h 04m
San Juan Luis Munoz Marin Intl
Thu 6/25
2:05 pm-6:14 pm
Nonstop4h 09m
$350
BostonSan Juan
BOS - SJU
BOSSJU
Boston Logan Intl
Sun 5/31
6:00 am-4:29 pm
1 stop10h 29m
San Juan Luis Munoz Marin Intl
Sat 6/6
2:00 pm-6:18 pm
Nonstop4h 18m
$355
BostonSan Juan
BOS - SJU
BOSSJU
Boston Logan Intl
Wed 9/30
9:05 am-4:31 pm
1 stop7h 26m
San Juan Luis Munoz Marin Intl
Thu 10/8
7:00 am-3:22 pm
1 stop8h 22m
$359
BostonSan Juan
BOS - SJU
BOSSJU
Boston Logan Intl
Tue 5/12
7:35 am-6:10 pm
2 stops10h 35m
San Juan Luis Munoz Marin Intl
Fri 5/15
10:00 am-9:50 pm
2 stops11h 50m
$384
Showing 1-10 of 23 resultsSorted by cheapest first
Best time to book a flight from Boston to San Juan
Have a flexible travel schedule? Discover the best time to fly to San Juan from Boston with our price prediction graph.
BOS-PR1
BOS-SJU
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from Boston to San Juan
BOS-PR1
BOS-SJU
How far ahead should I book a flight from Boston to San Juan?
Use this chart to determine the optimal time to book a round-trip flight from Boston to San Juan. Price data was last updated on April 2, 2026.
The best time to book flights from Boston to San Juan is 47 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.
What is the cheapest month to book a flight from Boston to San Juan?
Currently, March is the cheapest month in which you can book a flight from Boston to San Juan (average of $64). Flying from Boston to San Juan in November is currently the most expensive (average of $177). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
What is the cheapest time of day to fly from BOS to SJU?
Find hourly flight availability from Boston to San Juan. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated April 3, 2026.
A simple way to save on the total cost of your ticket is to fly from Boston to San Juan in the afternoon. If you’re flexible enough to do this you can expect to save up to 19% on your trip compared to booking a flight in the morning.
What is the cheapest day to fly from Boston to San Juan?
Use this chart to determine the cheapest time to fly round-trip from Boston to San Juan. Price data was last updated on March 28, 2026.
Travelers seeking maximum savings on their Boston to San Juan flight should consider departing on Tuesday afternoons when fares are most often at their lowest. Friday evenings flights should be avoided if possible as fares are typically the most expensive at this time.
Weekly flight availability from Boston to San Juan
Explore weekly flight availability from Boston to San Juan. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated April 3, 2026.
The most flights from BOS to PR1 are scheduled on a Thursday (16 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (14 on average).
How much does it cost to fly round-trip from Boston to San Juan?
How often are flights from Boston to San Juan delayed?
About 25% of weekly flights between Boston and San Juan have experienced delays in the past year, with the average delay time being 150 minutes.
What is the most punctual flight time for Boston to San Juan flights?
Historically, flights departing in the morning are less likely to be delayed, whereas flights leaving in the evening tend to experience delays more often.
What day of the week experiences the fewest flight delays on this route?
Wednesday tends to have the lowest number of delays on this route, whereas Sunday has historically faced a higher average of delays compared to other days of the week.
Which airline has the best punctuality record on Boston to San Juan flights?
Over the last year, Delta have had the lowest number of delays on this route, with just 18% of flights being delayed.
Reviews of airlines servicing San Juan
Get insights into the airlines that provide service to San Juan. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to San Juan. Reviews last updated April 3, 2026.
Get a feel of what it's like to fly with Delta,JetBlue, andAmerican Airlines from Boston to San Juan by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Boarding
8.1
Food
7.2
Entertainment
7.8
Comfort
7.9
Crew
8.5
Overall
7.9
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Boarding
8.1
Food
7.2
Entertainment
7.8
Comfort
7.9
Crew
8.5
Overall
7.9
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Boarding
8.1
Food
7.2
Entertainment
7.8
Comfort
7.9
Crew
8.5
Overall
7.9
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Boarding
8.1
Food
7.2
Entertainment
7.8
Comfort
7.9
Crew
8.5
Overall
7.9
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Boarding
8.1
Food
7.2
Entertainment
7.8
Comfort
7.9
Crew
8.5
Overall
7.9
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Boarding
8.1
Food
7.2
Entertainment
7.8
Comfort
7.9
Crew
8.5
Overall
7.9
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Related info for your journey
Find useful and relevant information for your journey from Boston to San Juan. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Browse thousands of different options on Cheapflights for your next trip
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Alternative routes for Boston to San Juan
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to San Juan by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Boston to San Juan by cabin class
Find flights from Boston to San Juan, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Boston and San Juan flights
Browse other Boston and San Juan flight options. Last updated on April 3, 2026.
Other flights from Boston
Browse through other flights departing from Boston. Flights are based on user searches made on Cheapflights and were last updated on April 3, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Top 7 airlines flying from Boston to San Juan
Discover the top 7 airlines that operate flights from Boston to San Juan. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated April 3, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$88 | Average$257 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$92 | Average$261 | FlexibilityNo cancel fee | On-time65% | |
| Cheapest$143 | Average$335 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$152 | Average$546 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$211 | Average$373 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$242 | Average$419 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$348 | Average$528 | FlexibilityNo cancel fee | On-time63% |