$103+ Cheap flights from Luis Munoz Marin Intl (SJU) to Illinois
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 10/7. Fares are subject to change and may not be available on all flights or dates of travel.
SJU — ORD
Aug 3 — Aug 101
1 adult, Economy
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Find cheap flights from Luis Munoz Marin Intl to Illinois 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
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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 Luis Munoz Marin Intl to Illinois
Keep the following information in mind while searching for Luis Munoz Marin Intl to Illinois flight deals. Data was last updated July 29, 2025.
Round-trip from | $205 (American Airlines) |
|---|---|
One-way from | $103 (Southwest) |
Popular in | June |
Cheapest in | January |
Average price | $301 |
Good round-trip deal | $273 or less |
Good one-way deal | $190 or less |
Find flight deals from Luis Munoz Marin Intl to Illinois
Cheapest flights from Luis Munoz Marin Intl to IllinoisExplore the most affordable flight options available from Luis Munoz Marin Intl to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 29, 2025.
Explore the most affordable flight options available from Luis Munoz Marin Intl to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 29, 2025.
This American Airlines deal was found by Cheapflights users on 7/27. 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.
Thu 9/113:50 pmSJU - STL
1 stop9h 03mAmerican Airlines
Wed 9/175:28 amSTL - SJU
1 stop8h 25mAmerican Airlines
Deal found 7/27![American Airlines logo]()
$205
This KAYAK deal was found by Cheapflights users on 7/29. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/73:00 pmSJU - ORD
Nonstop5h 20mAmerican Airlines
Wed 10/87:11 amORD - SJU
2 stops15h 48mAmerican Airlines
Deal found 7/29![American Airlines logo]()
$230
This CheapOair deal was found by Cheapflights users on 7/29. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1811:59 amSJU - ORD
1 stop11h 49mSpirit Airlines
Wed 9/246:44 pmORD - SJU
1 stop15h 20mSpirit Airlines
Deal found 7/29![Spirit Airlines logo]()
$231
This SmartFares deal was found by Cheapflights users on 7/29. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/13:21 pmSJU - MDW
1 stop8h 48mFrontier
Sat 11/156:10 amMDW - SJU
1 stop7h 05mFrontier
Deal found 7/29![Frontier logo]()
$234
This Kiwi.com deal was found by Cheapflights users on 7/29. 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.
Fri 8/1510:16 pmSJU - ORD
1 stop12h 06mMultiple Airlines
Thu 8/217:46 pmORD - SJU
1 stop12h 13mMultiple Airlines
Deal found 7/29![Multiple Airlines logo]()
$234
This SmartFares deal was found by Cheapflights users on 7/27. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/173:19 pmSJU - STL
2 stops19h 21mSpirit Airlines
Sun 9/2110:35 amSTL - SJU
1 stop23h 29mSpirit Airlines
Deal found 7/27![Spirit Airlines logo]()
$243
This Delta deal was found by Cheapflights users on 7/28. 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 9/265:41 pmSJU - STL
1 stop6h 43mDelta
Fri 10/31:26 pmSTL - SJU
1 stop7h 34mDelta
Deal found 7/28![Delta logo]()
$245
This eDestinos deal was found by Cheapflights users on 7/27. 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.
Thu 8/288:13 pmSJU - ORD
1 stop23h 28mFrontier
Sun 8/315:10 amORD - SJU
1 stop8h 16mFrontier
Deal found 7/27![Frontier logo]()
$252
This Priceline deal was found by Cheapflights users on 7/27. 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.
Sat 8/169:30 pmSJU - STL
1 stop27h 17mFrontier
Fri 8/223:16 pmSTL - SJU
1 stop27h 02mFrontier
Deal found 7/27![Frontier logo]()
$254
This United Airlines deal was found by Cheapflights users on 7/27. 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.
Wed 9/101:05 amSJU - STL
2 stops14h 14mUnited Airlines
Wed 9/176:15 amSTL - SJU
1 stop8h 27mUnited Airlines
Deal found 7/27![United Airlines logo]()
$255
This CheapOair deal was found by Cheapflights users on 7/28. 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 8/52:40 amSJU - STL
1 stop8h 49mMultiple Airlines
Mon 8/115:40 pmSTL - SJU
1 stop7h 59mMultiple Airlines
Deal found 7/28![Multiple Airlines logo]()
$277
This Southwest deal was found by Cheapflights users on 7/27. 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.
Wed 10/226:10 amSJU - STL
2 stops14h 50mSouthwest
Sun 10/261:50 pmSTL - SJU
1 stop5h 50mSouthwest
Deal found 7/27![Southwest logo]()
$300
Cheapflights Fare Finder
Customize your flight search to find flights from Luis Munoz Marin Intl to Illinois 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 July 29, 2025.
Use the filters below to find and compare flights from San Juan Luis Munoz Marin Intl Airport to Illinois that are best for you.
Fly from
Luis Munoz Marin Intl
Fly to
Illinois
Route
Depart
Return
Price
San JuanSt. Louis
SJU - STL
SJUSTL
San Juan Luis Munoz Marin Intl
Thu 9/11
3:50 pm-11:53 pm
1 stop9h 03m
Lambert-St Louis
Wed 9/17
5:28 am-2:53 pm
1 stop8h 25m
$205
San JuanChicago
SJU - ORD
SJUORD
San Juan Luis Munoz Marin Intl
Tue 10/7
3:00 pm-7:20 pm
Nonstop5h 20m
Chicago O'Hare Intl
Wed 10/8
7:11 am-11:59 pm
2 stops15h 48m
$230
San JuanChicago
SJU - ORD
SJUORD
San Juan Luis Munoz Marin Intl
Thu 9/18
11:59 am-10:48 pm
1 stop11h 49m
Chicago O'Hare Intl
Wed 9/24
6:44 pm-11:04 am
1 stop15h 20m
$231
San JuanChicago
SJU - ORD
SJUORD
San Juan Luis Munoz Marin Intl
Fri 8/15
10:16 pm-9:22 am
1 stop12h 06m
Chicago O'Hare Intl
Thu 8/21
7:46 pm-8:59 am
1 stop12h 13m
$234
San JuanChicago
SJU - MDW
SJUMDW
San Juan Luis Munoz Marin Intl
Sat 8/30
8:23 pm-8:22 am
1 stop12h 59m
Chicago Midway
Sat 9/6
6:15 am-2:11 pm
1 stop6h 56m
$238
San JuanSt. Louis
SJU - STL
SJUSTL
San Juan Luis Munoz Marin Intl
Wed 9/17
3:19 pm-9:40 am
2 stops19h 21m
Lambert-St Louis
Sun 9/21
10:35 am-11:04 am
1 stop23h 29m
$243
San JuanSt. Louis
SJU - STL
SJUSTL
San Juan Luis Munoz Marin Intl
Fri 9/26
5:41 pm-11:24 pm
1 stop6h 43m
Lambert-St Louis
Fri 10/3
1:26 pm-10:00 pm
1 stop7h 34m
$245
San JuanChicago
SJU - ORD
SJUORD
San Juan Luis Munoz Marin Intl
Thu 8/28
8:13 pm-6:41 pm
1 stop23h 28m
Chicago O'Hare Intl
Sun 8/31
5:10 am-2:26 pm
1 stop8h 16m
$252
San JuanSt. Louis
SJU - STL
SJUSTL
San Juan Luis Munoz Marin Intl
Sat 8/16
9:30 pm-11:47 pm
1 stop27h 17m
Lambert-St Louis
Fri 8/22
3:16 pm-7:18 pm
1 stop27h 02m
$254
San JuanSt. Louis
SJU - STL
SJUSTL
San Juan Luis Munoz Marin Intl
Wed 9/10
1:05 am-2:19 pm
2 stops14h 14m
Lambert-St Louis
Wed 9/17
6:15 am-3:42 pm
1 stop8h 27m
$255
Showing 1-10 of 24 results
Best time to book a flight from Luis Munoz Marin Intl to Illinois
Have a flexible travel schedule? Discover the best time to fly to Illinois from Luis Munoz Marin Intl 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 San Juan Luis Munoz Marin Intl Airport to Illinois
What is the cheapest month to book a flight from San Juan Luis Munoz Marin Intl Airport to Illinois?
Currently, August is the cheapest month in which you can book a flight from San Juan Luis Munoz Marin Intl Airport to Illinois (average of $245). Flying from San Juan Luis Munoz Marin Intl Airport to Illinois in March is currently the most expensive (average of $321). 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 SJU to IL?
Find hourly flight availability from Luis Munoz Marin Intl to Illinois. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 29, 2025.
When flying from San Juan Luis Munoz Marin Intl Airport to Illinois, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.
Weekly flight availability from San Juan Luis Munoz Marin Intl Airport to Illinois
Explore weekly flight availability from Luis Munoz Marin Intl to Illinois. 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 July 29, 2025.
The most flights from SJU to USIL are scheduled on a Monday (9 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (8 on average).
How much does it cost to fly round-trip from San Juan Luis Munoz Marin Intl Airport to Illinois?
Reviews of airlines servicing Illinois
Get insights into the airlines that provide service to Illinois. 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 Illinois. Reviews last updated July 29, 2025.
Get a feel of what it's like to fly with Southwest, Delta, and United Airlines from San Juan Luis Munoz Marin Intl Airport to Illinois by reading reviews from past customers. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Boarding
8.1
Overall
8.0
Entertainment
7.5
Comfort
8.0
Crew
8.6
Food
7.0
Reviews
1 / 20
8.0
ExcellentGina,Jul 2025
LAS - DEN
Boarding
8.1
Overall
8.0
Entertainment
7.5
Comfort
8.0
Crew
8.6
Food
7.0
Reviews
1 / 20
8.0
ExcellentGina,Jul 2025
LAS - DEN
Boarding
8.1
Overall
8.0
Entertainment
7.5
Comfort
8.0
Crew
8.6
Food
7.0
Reviews
1 / 20
8.0
ExcellentGina,Jul 2025
LAS - DEN
Boarding
8.1
Overall
8.0
Entertainment
7.5
Comfort
8.0
Crew
8.6
Food
7.0
Reviews
1 / 20
8.0
ExcellentGina,Jul 2025
LAS - DEN
Boarding
8.1
Overall
8.0
Entertainment
7.5
Comfort
8.0
Crew
8.6
Food
7.0
Reviews
1 / 20
8.0
ExcellentGina,Jul 2025
LAS - DEN
Boarding
8.1
Overall
8.0
Entertainment
7.5
Comfort
8.0
Crew
8.6
Food
7.0
Reviews
1 / 20
8.0
ExcellentGina,Jul 2025
LAS - DEN
Related info for your journey
Find useful and relevant information for your journey from Luis Munoz Marin Intl to Illinois. 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 Luis Munoz Marin Intl to Illinois
See prices for flight routes from nearby airports that may be better suited for you.
Top 6 airlines flying from Luis Munoz Marin Intl to Illinois
Discover the top 6 airlines that operate flights from Luis Munoz Marin Intl to Illinois. 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 July 29, 2025.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$130 | Average$246 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$137 | Average$272 | FlexibilityNo cancel fee | On-time65% | |
| Cheapest$162 | Average$374 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$219 | Average$469 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$257 | Average$445 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$329 | Average$479 | FlexibilityNo cancel fee | On-time71% |