Luis Munoz Marin Intl

$108+ Cheap flights from Illinois to Luis Munoz Marin Intl (SJU)

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 11/1. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — SJU
Oct 15 — Oct 221
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Illinois to Luis Munoz Marin Intl 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 Luis Munoz Marin Intl

Keep the following information in mind while searching for Illinois to Luis Munoz Marin Intl flight deals. Data was last updated September 15, 2025.

Round-trip from

$207
(Mytrip)

One-way from

$108
(Cheapflightsfares)

Popular in

December

Cheapest in

October

Average price

$380

Good round-trip deal

$360 or less

Good one-way deal

$187 or less
From Illinois to San Juan Luis Munoz Marin Intl
One-way flight from Illinois to San Juan Luis Munoz Marin Intl
Highest demand for flights based on searches. 8% potential increase in price ($35 potential increase over avg. RT price).
Cheapest flight prices on average. 3% potential price decrease ($16 potential savings vs. average RT price).
Average for round-trip flights in September 2025
Price to beat on a round-trip flight from Illinois to San Juan Luis Munoz Marin Intl.
Price to beat on a one-way flight from Illinois to San Juan Luis Munoz Marin Intl.

Find flight deals from Illinois to Luis Munoz Marin Intl

Cheapest flights from Illinois to Luis Munoz Marin Intl
Explore the most affordable flight options available from Illinois to Luis Munoz Marin Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 15, 2025.

This Mytrip deal was found by Cheapflights users on 9/14. 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.
Sat 10/1111:55 amORD - SJU
2 stops26h 04mSpirit Airlines
Sat 10/189:48 amSJU - ORD
Nonstop5h 08mSpirit Airlines
Deal found 9/14$207
This Cheapflightsfares deal was found by Cheapflights users on 9/13. 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.
Fri 10/249:06 pmORD - SJU
Nonstop4h 45mSpirit Airlines
Tue 10/283:19 pmSJU - ORD
1 stop7h 14mSpirit Airlines
Deal found 9/13$208
This Kiwi.com deal was found by Cheapflights users on 9/13. 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.
Sat 10/411:57 amORD - SJU
2 stops20h 59mMultiple Airlines
Tue 10/76:22 amSJU - ORD
1 stop11h 51mMultiple Airlines
Deal found 9/13$209
This Kiwi.com deal was found by Cheapflights users on 9/14. 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 9/226:30 amORD - SJU
1 stop6h 41mSpirit Airlines
Thu 10/211:59 amSJU - ORD
1 stop6h 40mSpirit Airlines
Deal found 9/14$210
This Kiwi.com deal was found by Cheapflights users on 9/14. 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 9/226:30 amORD - SJU
1 stop6h 41mSpirit Airlines
Sat 9/276:44 amSJU - ORD
1 stop10h 28mSpirit Airlines
Deal found 9/14$211
This Cheapflightsfares deal was found by Cheapflights users on 9/12. 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.
Wed 10/16:30 amORD - SJU
1 stop6h 41mSpirit Airlines
Sat 10/46:44 amSJU - ORD
1 stop10h 28mSpirit Airlines
Deal found 9/12$212
This Cheapflightsfares deal was found by Cheapflights users on 9/14. 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.
Fri 10/35:17 pmORD - SJU
1 stop6h 37mSpirit Airlines
Tue 10/73:19 pmSJU - ORD
1 stop7h 14mSpirit Airlines
Deal found 9/14$213
This Cheapflightsfares deal was found by Cheapflights users on 9/12. 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.
Wed 12/36:55 amORD - SJU
Nonstop4h 38mSpirit Airlines
Mon 12/82:38 pmSJU - ORD
Nonstop5h 22mSpirit Airlines
Deal found 9/12$215
This Cheapflightsfares deal was found by Cheapflights users on 9/14. 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.
Sat 12/67:35 amORD - SJU
1 stop11h 09mSpirit Airlines
Wed 12/172:38 pmSJU - ORD
Nonstop5h 22mSpirit Airlines
Deal found 9/14$216
This Cheapflightsfares deal was found by Cheapflights users on 9/13. 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.
Thu 9/1812:05 pmORD - SJU
1 stop11h 49mSpirit Airlines
Sat 9/273:19 pmSJU - ORD
1 stop7h 39mSpirit Airlines
Deal found 9/13$217
This United Airlines deal was found by Cheapflights users on 9/13. 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.
Mon 10/208:52 amORD - SJU
Nonstop4h 52mUnited Airlines
Wed 10/223:56 pmSJU - ORD
Nonstop5h 07mUnited Airlines
Deal found 9/13$218
This Kiwi.com deal was found by Cheapflights users on 9/14. 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 10/279:06 pmORD - SJU
Nonstop4h 45mMultiple Airlines
Tue 11/49:00 amSJU - ORD
1 stop29h 45mMultiple Airlines
Deal found 9/14$219

Cheapflights Fare Finder

 
Customize your flight search to find flights from Illinois to Luis Munoz Marin Intl 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 September 15, 2025.
Use the filters below to find and compare flights from Illinois to San Juan Luis Munoz Marin Intl Airport that are best for you.

Fly from

Illinois

Fly to

Luis Munoz Marin Intl

Route

Depart

Return

Price

ChicagoSan Juan

ORD - SJU

ORDSJU

Chicago O'Hare Intl

Tue 11/4

2:20 pm-9:00 pm

Nonstop4h 40m

San Juan Luis Munoz Marin Intl

Fri 11/7

8:10 am-11:32 am

Nonstop5h 22m

$218

ChicagoSan Juan

ORD - SJU

ORDSJU

Chicago O'Hare Intl

Thu 10/30

2:20 pm-8:00 pm

Nonstop4h 40m

San Juan Luis Munoz Marin Intl

Mon 11/3

4:52 pm-8:20 pm

Nonstop5h 28m

$218

ChicagoSan Juan

ORD - SJU

ORDSJU

Chicago O'Hare Intl

Tue 11/11

3:07 pm-12:36 am

1 stop7h 29m

San Juan Luis Munoz Marin Intl

Fri 11/14

8:10 am-11:32 am

Nonstop5h 22m

$223

St. LouisSan Juan

STL - SJU

STLSJU

Lambert-St Louis

Fri 10/24

1:55 pm-12:45 am

1 stop9h 50m

San Juan Luis Munoz Marin Intl

Tue 10/28

6:10 am-8:00 pm

2 stops14h 50m

$225

ChicagoSan Juan

ORD - SJU

ORDSJU

Chicago O'Hare Intl

Sat 10/25

10:36 am-11:56 pm

1 stop12h 20m

San Juan Luis Munoz Marin Intl

Sat 11/1

1:06 pm-9:39 pm

1 stop9h 33m

$227

ChicagoSan Juan

ORD - SJU

ORDSJU

Chicago O'Hare Intl

Sat 10/18

6:08 am-2:11 pm

1 stop7h 03m

San Juan Luis Munoz Marin Intl

Wed 10/22

1:06 pm-9:39 pm

1 stop9h 33m

$227

ChicagoSan Juan

MDW - SJU

MDWSJU

Chicago Midway

Wed 11/5

10:40 am-10:05 pm

1 stop9h 25m

San Juan Luis Munoz Marin Intl

Wed 11/12

9:40 am-7:25 pm

1 stop11h 45m

$227

ChicagoSan Juan

ORD - SJU

ORDSJU

Chicago O'Hare Intl

Sat 10/18

6:08 am-2:11 pm

1 stop7h 03m

San Juan Luis Munoz Marin Intl

Fri 10/24

2:22 pm-8:23 pm

1 stop7h 01m

$227

ChicagoSan Juan

MDW - SJU

MDWSJU

Chicago Midway

Fri 10/17

4:35 pm-11:50 pm

1 stop6h 15m

San Juan Luis Munoz Marin Intl

Tue 10/21

2:45 pm-10:45 pm

1 stop9h 00m

$227

ChicagoSan Juan

ORD - SJU

ORDSJU

Chicago O'Hare Intl

Tue 10/21

7:00 am-4:25 pm

1 stop8h 25m

San Juan Luis Munoz Marin Intl

Sat 10/25

7:00 am-5:22 pm

1 stop11h 22m

$227

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/14

Showing 1-10 of 60 results
1
2
3
...
6

Best time to book a flight from Illinois to Luis Munoz Marin Intl

Have a flexible travel schedule? Discover the best time to fly to Luis Munoz Marin Intl from Illinois 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.

Cheapflights Insights

Everything you need to know about your flight from Illinois to San Juan Luis Munoz Marin Intl Airport

What is the cheapest month to book a flight from Illinois to San Juan Luis Munoz Marin Intl Airport?

Currently, September is the cheapest month in which you can book a flight from Illinois to San Juan Luis Munoz Marin Intl Airport (average of $254). Flying from Illinois to San Juan Luis Munoz Marin Intl Airport in June is currently the most expensive (average of $339). 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 Luis Munoz Marin Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 15, 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 Luis Munoz Marin Intl Airport as you normally would.

Weekly flight availability from Illinois to San Juan Luis Munoz Marin Intl Airport

Explore weekly flight availability from Illinois to Luis Munoz Marin Intl. 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 September 15, 2025.

The most flights from USIL to SJU are scheduled on a Friday (4 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (3 on average).

Related info for your journey

Find useful and relevant information for your journey from Illinois to Luis Munoz Marin Intl. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
  • How long is the flight from Illinois to San Juan Luis Munoz Marin Intl Airport?

    United Airlines, Southwest, and Delta can get you from Illinois to San Juan Luis Munoz Marin Intl Airport in just under 4h 40m. Your travel time can differ by up to 7h 40m. There are 2073 mi between Illinois and San Juan Luis Munoz Marin Intl Airport. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines to fly from Illinois to San Juan Luis Munoz Marin Intl Airport one-way?

    The cheapest airlines for a one-way flight from Illinois to San Juan Luis Munoz Marin Intl Airport are United Airlines ($109), Delta ($113), and Southwest ($114).

  • What are the most popular routes from Illinois to San Juan Luis Munoz Marin Intl Airport?

  • What are the most reliable airlines from Illinois to San Juan Luis Munoz Marin Intl Airport?

    Consider Spirit Airlines (79%), American Airlines (77%) or Alaska Airlines (77%) when booking your flight. These represent the most reliable airlines when flying from Illinois to San Juan Luis Munoz Marin Intl Airport.

  • What are the cheapest flights from Illinois to San Juan Luis Munoz Marin Intl Airport?

    On average you can expect to pay $463 for a flight from Illinois to San Juan Luis Munoz Marin Intl Airport. The cheapest flight overall is $127 while the most popular route, (Chicago O'Hare Intl - San Juan Luis Munoz Marin Intl) is currently priced at $168.

  • Can I find deals for flights from Illinois to Luis Munoz Marin Intl that include hotel bookings?

    Yes. In addition to deals on Illinois to Luis Munoz Marin Intl flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Illinois to Luis Munoz Marin Intl?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Illinois to Luis Munoz Marin Intl.

  • Can I find deals for business class flights from Illinois to Luis Munoz Marin Intl?

    Yes. Cheapflights offers flight deals from Illinois to Luis Munoz Marin Intl 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 Illinois to San Juan Luis Munoz Marin Intl Airport?

    Currently, September is the cheapest month in which you can book a flight from Illinois to San Juan Luis Munoz Marin Intl Airport (average of $254). Flying from Illinois to San Juan Luis Munoz Marin Intl Airport in June is currently the most expensive (average of $339). 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

Traveling to a place near San Juan Luis Munoz Marin Intl Airport?

Book flights to San Juan Luis Munoz Marin Intl Airport if you plan to visit one of these locations
Dorado
Fajardo
Rio Grande
Luquillo
Humacao

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Illinois to Luis Munoz Marin Intl

See prices for flight routes from nearby airports that may be better suited for you.

Top 7 airlines flying from Illinois to Luis Munoz Marin Intl

Discover the top 7 airlines that operate flights from Illinois to Luis Munoz Marin Intl. 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 September 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$106Average$280FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$139Average$335FlexibilityNo cancel feeOn-time65%
American AirlinesCheapest$194Average$576FlexibilityNo cancel feeOn-time71%
DeltaCheapest$196Average$410FlexibilityNo cancel feeOn-timeN/A
JetBlueCheapest$271Average$418FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$277Average$511FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$364Average$488FlexibilityNo cancel feeOn-time63%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.