$96+ Cheap flights from Illinois 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 5/1. Fares are subject to change and may not be available on all flights or dates of travel.
Find cheap flights from Illinois 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.Cheap flight deals from Illinois to San Juan
Keep the following information in mind while searching for Illinois to San Juan flight deals. Data was last updated April 3, 2025.
Round-trip from | $174 (Cheapflightsfares) |
|---|---|
One-way from | $96 (CheapOair) |
Popular in | December |
Cheapest in | August |
Average price | $312 |
Find flight deals from Illinois to San Juan
Cheapest flights from Illinois to San JuanExplore the most affordable flight options available from Illinois to San Juan. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 3, 2025.
Explore the most affordable flight options available from Illinois to San Juan. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 3, 2025.
This Cheapflightsfares 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This American Airlines 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This CheapOair 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
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.
This American 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Cheapflightsfares 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This American Airlines deal was found by Cheapflights users on 4/3. 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.
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
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.
This CheapOair 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This JetBlue 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Cheapflights Fare Finder
Customize your flight search to find flights from Illinois 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, 2025.
Use the filters below to find and compare flights from Illinois to San Juan that are best for you.
Fly from
Fly to
Route
Depart
Return
Price
ChicagoSan Juan
ORD - SJU
ORDSJU
Chicago O'Hare Intl
Sun 4/13
8:45 am-11:46 pm
1 stop14h 01m
San Juan Luis Munoz Marin Intl
Fri 4/18
9:30 pm-8:04 am
1 stop11h 34m
PeoriaSan Juan
PIA - SJU
PIASJU
Greater Peoria
Sun 9/28
4:36 pm-12:45 pm
2 stops19h 09m
San Juan Luis Munoz Marin Intl
Mon 10/6
5:27 pm-10:48 am
2 stops18h 21m
SpringfieldSan Juan
SPI - SJU
SPISJU
Springfield Capital
Wed 9/3
6:36 pm-4:20 pm
2 stops20h 44m
San Juan Luis Munoz Marin Intl
Tue 9/9
3:55 pm-12:44 pm
2 stops21h 49m
ChicagoSan Juan
ORD - SJU
ORDSJU
Chicago O'Hare Intl
Sat 4/12
11:45 am-11:46 pm
1 stop11h 01m
San Juan Luis Munoz Marin Intl
Tue 4/15
9:28 am-7:04 pm
1 stop10h 36m
St. LouisSan Juan
STL - SJU
STLSJU
Lambert-St Louis
Sat 5/3
4:15 pm-11:15 pm
1 stop6h 00m
San Juan Luis Munoz Marin Intl
Wed 5/7
1:55 pm-8:49 pm
1 stop7h 54m
MolineSan Juan
MLI - SJU
MLISJU
Moline Quad-City
Wed 9/10
4:30 pm-12:45 pm
2 stops19h 15m
San Juan Luis Munoz Marin Intl
Thu 9/11
3:58 pm-10:53 am
2 stops19h 55m
ChicagoSan Juan
MDW - SJU
MDWSJU
Chicago Midway
Wed 4/9
3:00 pm-10:53 pm
1 stop6h 53m
San Juan Luis Munoz Marin Intl
Thu 4/10
5:30 am-11:43 am
1 stop7h 13m
St. LouisSan Juan
STL - SJU
STLSJU
Lambert-St Louis
Sat 5/3
5:27 pm-5:00 am
1 stop10h 33m
San Juan Luis Munoz Marin Intl
Sat 5/17
5:25 am-12:27 pm
1 stop8h 02m
ChicagoSan Juan
ORD - SJU
ORDSJU
Chicago O'Hare Intl
Wed 4/9
2:00 pm-10:53 pm
1 stop7h 53m
San Juan Luis Munoz Marin Intl
Thu 4/10
5:30 am-3:06 pm
1 stop10h 36m
St. LouisSan Juan
STL - SJU
STLSJU
Lambert-St Louis
Tue 4/15
4:57 pm-1:50 am
1 stop7h 53m
San Juan Luis Munoz Marin Intl
Fri 4/18
2:20 pm-11:46 pm
1 stop10h 26m
Best time to book a flight from Illinois to San Juan
Have a flexible travel schedule? Discover the best time to fly to San Juan from Illinois with our price prediction graph.
Cheapflights Insights
Everything you need to know about your flight from Illinois to San Juan
What is the cheapest month to book a flight from Illinois to San Juan?
Currently, September is the cheapest month in which you can book a flight from Illinois to San Juan (average of $254). Flying from Illinois to San Juan in December is currently the most expensive (average of $336). 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 IL to SJU?
Find hourly flight availability from Illinois 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, 2025.
Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Illinois to San Juan as you normally would.
Weekly flight availability from Illinois to San Juan
Explore weekly flight availability from Illinois 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, 2025.
The most flights from USIL to PR1 are scheduled on a Monday (10 on average). You will have fewer flight options on Friday, which is when the least amount of flights are scheduled (8 on average).
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 April 3, 2025.
See what other customers who have flown with Southwest, Delta and United Airlines from Illinois to San Juan have to say. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Overall
Entertainment
Boarding
Crew
Food
Comfort
Reviews
Ila,Mar 2025
HOU - DAL
Overall
Entertainment
Boarding
Crew
Food
Comfort
Reviews
Ila,Mar 2025
HOU - DAL
Overall
Entertainment
Boarding
Crew
Food
Comfort
Reviews
Ila,Mar 2025
HOU - DAL
Overall
Entertainment
Boarding
Crew
Food
Comfort
Reviews
Ila,Mar 2025
HOU - DAL
Overall
Entertainment
Boarding
Crew
Food
Comfort
Reviews
Ila,Mar 2025
HOU - DAL
Overall
Entertainment
Boarding
Crew
Food
Comfort
Reviews
Ila,Mar 2025
HOU - DAL
Related info for your journey
Find useful and relevant information for your journey from Illinois to San Juan. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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Alternative routes for Illinois to San Juan
See prices for flight routes from nearby airports that may be better suited for you.
Top 7 airlines flying from Illinois to San Juan
Discover the top 7 airlines that operate flights from Illinois 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, 2025.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$124 | Average$265 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$144 | Average$273 | FlexibilityNo cancel fee | On-time65% | |
| Cheapest$194 | Average$549 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$235 | Average$435 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$271 | Average$525 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$293 | Average$399 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$342 | Average$479 | FlexibilityNo cancel fee | On-time63% |