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$112+ Cheap flights from Seattle (SEA) 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 3/5. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SJU
Jan 25 — Feb 11
Sat 1/25
Sat 2/1
1 adult, Economy
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The best prices from Seattle/Tacoma Intl to San Juan are usually found in September or October, booked 76 days in advance, depart on a Tuesday or Monday and return on a Tuesday

Cheap flight deals from Seattle to San Juan

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) 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 January 20, 2025.

Round-trip from

$337
(Mytrip)

One-way from

$112
(Flightnetwork)

Popular in

December

Cheapest in

September

Average price

$458
From Seattle/Tacoma Intl to San Juan
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One-way flight from Seattle/Tacoma Intl to San Juan
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High demand for flights, 6% potential price rise
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Best time to find cheap flights, 4% potential price drop
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Average for round-trip flights in January 2025
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Find flight deals from Seattle to San Juan

Cheapest flights from Seattle to San Juan
Explore the most affordable flight options available from Seattle to San Juan. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 20, 2025.

This Mytrip deal was found by Cheapflights users on 1/18. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/45:15 amSEA - SJU
3 stops25h 17mSpirit Airlines
Wed 3/51:05 pmSJU - SEA
3 stops33h 57mSpirit Airlines
Deal found 1/18$337
This United Airlines deal was found by Cheapflights users on 1/18. 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.
Tue 3/48:10 amSEA - SJU
1 stop10h 12mUnited Airlines
Tue 3/42:05 amSJU - SEA
1 stop13h 18mUnited Airlines
Deal found 1/18$342
This JetBlue Airways deal was found by Cheapflights users on 1/19. 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 JetBlue Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/311:35 amSEA - SJU
1 stop10h 45mJetBlue
Wed 5/711:55 amSJU - SEA
1 stop11h 18mJetBlue
Deal found 1/19$348
This American Airlines deal was found by Cheapflights users on 1/19. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/310:17 pmSEA - SJU
1 stop9h 58mAmerican Airlines
Mon 3/105:00 amSJU - SEA
1 stop20h 05mAmerican Airlines
Deal found 1/19$372
This Expedia deal was found by Cheapflights users on 1/19. 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.
Tue 2/255:15 amSEA - SJU
2 stops28h 15mMultiple Airlines
Sat 3/16:30 amSJU - SEA
1 stop13h 44mMultiple Airlines
Deal found 1/19$383
This Delta deal was found by Cheapflights users on 1/20. 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 10/319:20 pmSEA - SJU
1 stop13h 21mDelta
Sat 11/83:45 pmSJU - SEA
1 stop12h 23mDelta
Deal found 1/20$455

Find flights from Seattle to San Juan within your budget

Customize your flight search to find flights from Seattle 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 January 20, 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Tue 3/4

5:15 am-10:32 am

3 stops25h 17m

San Juan Luis Munoz Marin Intl

Wed 3/5

1:05 pm-7:02 pm

3 stops33h 57m

$337

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Tue 3/4

5:02 am-10:22 pm

2 stops13h 20m

San Juan Luis Munoz Marin Intl

Tue 3/4

2:05 am-11:23 am

1 stop13h 18m

$342

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Sat 5/3

11:35 am-1:20 am

1 stop10h 45m

San Juan Luis Munoz Marin Intl

Wed 5/7

11:55 am-8:13 pm

1 stop11h 18m

$348

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Mon 3/3

10:17 pm-12:15 pm

1 stop9h 58m

San Juan Luis Munoz Marin Intl

Mon 3/10

5:00 am-10:05 pm

1 stop20h 05m

$372

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Tue 2/25

5:15 am-1:30 pm

2 stops28h 15m

San Juan Luis Munoz Marin Intl

Sat 3/1

6:30 am-4:14 pm

1 stop13h 44m

$383

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Mon 2/3

5:16 pm-4:07 pm

2 stops18h 51m

San Juan Luis Munoz Marin Intl

Sun 2/9

3:53 pm-8:50 am

2 stops20h 57m

$392

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Tue 2/18

6:15 am-11:46 pm

1 stop13h 31m

San Juan Luis Munoz Marin Intl

Thu 2/20

6:15 am-2:18 pm

1 stop12h 03m

$475

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Wed 3/5

12:41 pm-5:40 pm

2 stops24h 59m

$112

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Wed 3/12

8:10 am-9:22 pm

1 stop10h 12m

$174

SeattleSan Juan

SEA - SJU

SEASJU

Seattle/Tacoma Intl

Sun 4/27

6:00 am-7:41 pm

2 stops34h 41m

$186

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/19

Showing 1-10 of 17 results
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Best time to book a flight from Seattle to San Juan

Have a flexible travel schedule? Discover the best time to fly to San Juan from Seattle with our price prediction graph.
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.

Travel insights for flights from Seattle to San Juan

Get recent, data-driven insights about flights from Seattle to San Juan including ideal travel times, pricing trends, and more.

How far ahead should I book a flight from Seattle to San Juan?

Use this chart to determine the optimal time to book a round-trip flight from Seattle to San Juan. Price data was last updated on January 17, 2025.

The best time to book flights from Seattle to San Juan is 76 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 Seattle to San Juan?

Currently, September is the cheapest month in which you can book a flight from Seattle to San Juan (average of $254). Flying from Seattle to San Juan in March is currently the most expensive (average of $378). 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 SEA to SJU?

Find hourly flight availability from Seattle 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 January 20, 2025.

It’s typically best to fly out from Seattle to San Juan at noon. Doing so could potentially save you 20% on the flight price compared to flying in the evening, which is usually more expensive.

What is the cheapest day to fly from Seattle to San Juan?

Use this chart to determine the cheapest time to fly round-trip from Seattle to San Juan. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Seattle to San Juan flight should consider departing on Thursday at noon when fares are most often at their lowest. Friday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

Rainfall in San Juan by month

Plan your trip to San Juan by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in San Juan ranges from 2.2 - 6.1 inches per month. November is typically the wettest month, when rainfall can reach 6.1 in. February is typically the driest time to visit San Juan when rainfall is around 2.2 in.

Temperature in San Juan by month

Plan your trip to San Juan by taking into account the average temperature totals by month.

If weather is an important factor for your trip to San Juan, use this chart to help with planning. For those seeking warmer temperatures, June is the ideal time of year to visit, when temperatures reach an average of 82.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 77.0 F).

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 January 20, 2025.
To help decide which airline to fly from Seattle to San Juan, see what other customers have to say about Spirit Airlines, United Airlines and American Airlines. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very good
4,659 reviews

Entertainment

7.7

Comfort

8.1

Boarding

8.2

Food

7.2

Crew

8.7

Overall

8.1

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Southwest
8.1
Very good
4,659 reviews
Southwest
8.1
Very good
4,659 reviews

Entertainment

7.7

Comfort

8.1

Boarding

8.2

Food

7.2

Crew

8.7

Overall

8.1

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Alaska Airlines
8.0
Very good
9,696 reviews
Southwest
8.1
Very good
4,659 reviews

Entertainment

7.7

Comfort

8.1

Boarding

8.2

Food

7.2

Crew

8.7

Overall

8.1

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Delta
8.0
Very good
8,521 reviews
Southwest
8.1
Very good
4,659 reviews

Entertainment

7.7

Comfort

8.1

Boarding

8.2

Food

7.2

Crew

8.7

Overall

8.1

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

JetBlue
7.4
Good
3,201 reviews
Southwest
8.1
Very good
4,659 reviews

Entertainment

7.7

Comfort

8.1

Boarding

8.2

Food

7.2

Crew

8.7

Overall

8.1

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

United Airlines
7.4
Good
8,982 reviews
Southwest
8.1
Very good
4,659 reviews

Entertainment

7.7

Comfort

8.1

Boarding

8.2

Food

7.2

Crew

8.7

Overall

8.1

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Related info for your journey

Find useful and relevant information for your journey from Seattle to San Juan. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Seattle to San Juan?

    Located just 11.4 mi from the city center, Seattle/Tacoma Intl is the airport most travelers will use when flying to San Juan from Seattle. Booking flights from Seattle/Tacoma Intl (SEA) to San Juan should be relatively easy as there are 0 daily outbound flights to San Juan from 9 different airlines.

  • What are the cheapest airlines flying from Seattle to San Juan round-trip?

    Our cheapest airline available from Seattle to San Juan is Spirit Airlines. Our recent data shows that you can find tickets from as low as $337 on this airline. Additional options worth looking into are United Airlines and JetBlue, starting at $342 and $348 round-trip. Spirit Airlines is currently priced 40% below the average price you’ll pay for this route.

  • What are the cheapest airlines to fly from Seattle to San Juan one-way?

    $112 is the cheapest one-way deal found within the past few days, from Spirit Airlines. You may also be able to find cheap deals on United Airlines and Frontier, with prices starting from $174 and $186, respectively.

  • Where are the most common layover locations when flying from Seattle to San Juan?

    Flights departing from Seattle and landing in San Juan layover in Dallas most frequently. Seattle to San Juan flights stop in Charlotte the next most. Miami comes in third as the most popular layover location on Seattle to San Juan flights.

  • What are some popular things to do or see while on a layover in Dallas?

    Most Dallas visitors opt to spend their time experiencing American Airlines Center, Dos Equis Pavilion, and Majestic Theatre. Travelers on a layover in Dallas can visit American Airlines Center, Dos Equis Pavilion, and Majestic Theatre, by traveling 15.0 mi, 18.3 mi, and 16.1 mi, respectively after landing at Dallas/Fort Worth. Travelers can book a car rental at Dallas/Fort Worth for about $53 per day to make their sightseeing more efficient.

  • What are some popular points of interest to see during a layover in Charlotte?

    Carowind, Mint Museum Uptown, and North Carolina Blumenthal Performing Arts Center are currently the most popular points of interest in Charlotte at the moment. Those on a layover in Charlotte interested in visiting Carowind, Mint Museum Uptown, or North Carolina Blumenthal Performing Arts Center can do so by traveling 8.2 mi, 5.4 mi, and 5.8 mi, respectively from Charlotte Douglas. Those looking to explore during their layover in Charlotte can rent a car from Charlotte Douglas for about $43 per day.

  • What are points of interest worth seeing during a layover in Miami?

    Bayfront Park, Wynwood Art District, and Bayside Marketplace are the most popular attractions in Miami if you're in need of something to do during your layover. Those on a layover in Miami interested in visiting Bayfront Park, Wynwood Art District, or Bayside Marketplace can do so by traveling 6.4 mi, 5.5 mi, and 6.4 mi, respectively from Miami. Those landing in Miami looking to spend some time exploring during their layover can rent a car for about $37 per day.

  • Where are the least popular layover locations for Seattle to San Juan flights?

    Of the flights from Seattle to San Juan that have layovers, the fewest flights stop in New York. Seattle to San Juan flights stopping in Atlanta are the next rarest.

  • Can I find deals for flights from Seattle to San Juan that include hotel bookings?

    Yes. In addition to deals on Seattle to San Juan flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Seattle to San Juan?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Seattle to San Juan.

  • Can I find deals for business class flights from Seattle to San Juan?

    Yes. Cheapflights offers flight deals from Seattle to San Juan by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Seattle to San Juan?

    Currently, September is the cheapest month in which you can book a flight from Seattle to San Juan (average of $254). Flying from Seattle to San Juan in March is currently the most expensive (average of $378). 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.

See more FAQs

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Top 9 airlines flying from Seattle to San Juan

Discover the top 9 airlines that operate flights from Seattle 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 January 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$270Average$395FlexibilityNo cancel feeOn-time65%
JetBlueCheapest$282Average$518FlexibilityNo cancel feeOn-time62%
FrontierCheapest$293Average$584FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$317Average$582FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$326Average$553FlexibilityNo cancel feeOn-time71%
Sun Country AirCheapest$348Average$885FlexibilityNo cancel feeOn-time83%
Alaska AirlinesCheapest$425Average$672FlexibilityNo cancel feeOn-time75%
DeltaCheapest$454Average$745FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$569Average$759FlexibilityNo cancel feeOn-time63%
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