$108+ 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 11/8. Fares are subject to change and may not be available on all flights or dates of travel.
SJU — ORD
Oct 11 — Oct 181
1 adult, Economy
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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 September 11, 2025.
Round-trip from | $181 (Cheapflightsfares) |
|---|---|
One-way from | $108 (Southwest) |
Popular in | June |
Cheapest in | January |
Average price | $294 |
Good round-trip deal | $336 or less |
Good one-way deal | $169 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 September 11, 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 September 11, 2025.
This Cheapflightsfares deal was found by Cheapflights users on 9/11. 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 10/113:19 pmSJU - ORD
1 stop7h 14mSpirit Airlines
Sat 10/183:00 pmORD - SJU
Nonstop4h 40mSpirit Airlines
Deal found 9/11![Spirit Airlines logo]()
$181
This Cheapflightsfares deal was found by Cheapflights users on 9/11. 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 9/306:44 amSJU - ORD
1 stop10h 28mSpirit Airlines
Sat 10/46:30 amORD - SJU
1 stop6h 41mSpirit Airlines
Deal found 9/11![Spirit Airlines logo]()
$186
This Kiwi.com deal was found by Cheapflights users on 9/11. 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 10/27:40 pmSJU - ORD
Nonstop5h 16mSpirit Airlines
Fri 10/312:55 pmORD - SJU
Nonstop4h 39mSpirit Airlines
Deal found 9/11![Spirit Airlines logo]()
$187
This Cheapflightsfares deal was found by Cheapflights users on 9/11. 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 10/37:40 pmSJU - ORD
Nonstop5h 16mSpirit Airlines
Wed 10/86:00 amORD - SJU
1 stop7h 12mSpirit Airlines
Deal found 9/11![Spirit Airlines logo]()
$189
This Kiwi.com deal was found by Cheapflights users on 9/11. 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.
Wed 10/13:19 pmSJU - ORD
1 stop7h 39mSpirit Airlines
Fri 10/312:55 pmORD - SJU
Nonstop4h 39mSpirit Airlines
Deal found 9/11![Spirit Airlines logo]()
$192
This Cheapflightsfares deal was found by Cheapflights users on 9/10. 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.
Mon 10/277:43 pmSJU - ORD
Nonstop5h 14mSpirit Airlines
Sat 11/12:03 pmORD - SJU
Nonstop4h 39mSpirit Airlines
Deal found 9/10![Spirit Airlines logo]()
$196
This Kiwi.com deal was found by Cheapflights users on 9/10. 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.
Wed 10/13:19 pmSJU - ORD
1 stop7h 39mSpirit Airlines
Sat 10/46:30 amORD - SJU
1 stop6h 41mSpirit Airlines
Deal found 9/10![Spirit Airlines logo]()
$198
This Cheapflightsfares deal was found by Cheapflights users on 9/11. 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 10/73:19 pmSJU - ORD
1 stop7h 14mSpirit Airlines
Fri 10/109:06 pmORD - SJU
Nonstop4h 45mSpirit Airlines
Deal found 9/11![Spirit Airlines logo]()
$200
This Spirit deal was found by Cheapflights users on 9/9. 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 Spirit is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/83:19 pmSJU - ORD
1 stop7h 14mSpirit Airlines
Wed 11/196:55 amORD - SJU
Nonstop4h 38mSpirit Airlines
Deal found 9/9![Spirit Airlines logo]()
$203
This Kiwi.com deal was found by Cheapflights users on 9/11. 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 9/306:44 amSJU - ORD
1 stop10h 28mSpirit Airlines
Fri 10/312:55 pmORD - SJU
Nonstop4h 39mSpirit Airlines
Deal found 9/11![Spirit Airlines logo]()
$204
This Cheapflightsfares deal was found by Cheapflights users on 9/10. 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 10/243:19 pmSJU - ORD
1 stop7h 14mSpirit Airlines
Mon 10/279:06 pmORD - SJU
Nonstop4h 45mSpirit Airlines
Deal found 9/10![Spirit Airlines logo]()
$208
This American Airlines deal was found by Cheapflights users on 9/8. 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.
Sat 10/185:30 amSJU - STL
1 stop14h 12mAmerican Airlines
Thu 10/306:25 amSTL - SJU
1 stop14h 45mAmerican Airlines
Deal found 9/8![American Airlines logo]()
$225
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 September 11, 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
Wed 10/29
7:05 am-6:20 pm
2 stops12h 15m
Lambert-St Louis
Mon 11/3
8:13 am-8:48 pm
1 stop10h 35m
$230
San JuanChicago
SJU - MDW
SJUMDW
San Juan Luis Munoz Marin Intl
Sat 10/4
3:22 pm-11:41 pm
1 stop9h 19m
Chicago Midway
Tue 10/7
8:05 am-2:30 am
2 stops17h 25m
$262
San JuanSt. Louis
SJU - STL
SJUSTL
San Juan Luis Munoz Marin Intl
Wed 10/15
1:05 am-10:49 am
2 stops10h 44m
Lambert-St Louis
Tue 10/28
6:15 am-3:36 pm
1 stop8h 21m
$268
San JuanChicago
SJU - MDW
SJUMDW
San Juan Luis Munoz Marin Intl
Fri 12/5
12:22 pm-8:38 pm
1 stop10h 16m
Chicago Midway
Mon 12/8
6:00 am-2:54 pm
1 stop6h 54m
$284
San JuanSt. Louis
SJU - STL
SJUSTL
San Juan Luis Munoz Marin Intl
Fri 10/17
3:40 am-3:38 pm
1 stop12h 58m
Lambert-St Louis
Thu 10/30
2:12 pm-9:24 pm
1 stop6h 12m
$286
San JuanChicago
SJU - MDW
SJUMDW
San Juan Luis Munoz Marin Intl
Fri 10/3
7:15 am-4:00 pm
1 stop9h 45m
Chicago Midway
Sat 10/4
11:21 am-11:59 pm
1 stop11h 38m
$286
San JuanSt. Louis
SJU - STL
SJUSTL
San Juan Luis Munoz Marin Intl
Fri 10/24
3:34 pm-11:18 pm
1 stop8h 44m
Lambert-St Louis
Fri 10/31
10:36 am-10:10 pm
2 stops10h 34m
$294
San JuanSt. Louis
SJU - STL
SJUSTL
San Juan Luis Munoz Marin Intl
Thu 10/16
5:00 pm-11:56 pm
1 stop7h 56m
Lambert-St Louis
Tue 10/28
6:00 am-3:55 pm
2 stops8h 55m
$294
San JuanSt. Louis
SJU - STL
SJUSTL
San Juan Luis Munoz Marin Intl
Mon 10/27
3:00 pm-11:54 pm
1 stop9h 54m
Lambert-St Louis
Thu 10/30
8:30 am-10:10 pm
1 stop12h 40m
$294
San JuanSt. Louis
SJU - STL
SJUSTL
San Juan Luis Munoz Marin Intl
Sat 10/18
5:30 am-6:42 pm
1 stop14h 12m
Lambert-St Louis
Thu 10/30
10:36 am-10:10 pm
2 stops10h 34m
$298
Showing 1-10 of 60 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 September 11, 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 September 11, 2025.
The most flights from SJU to USIL are scheduled on a Monday (4 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (3 on average).
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 September 11, 2025.
Get a feel of what it's like to fly with Southwest, United Airlines, and American 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.
Food
7.0
Boarding
8.1
Overall
8.0
Entertainment
7.5
Crew
8.6
Comfort
8.0
Reviews
1 / 20
2.0
MediocreMike,Aug 2025
OKC - AUS
Food
7.0
Boarding
8.1
Overall
8.0
Entertainment
7.5
Crew
8.6
Comfort
8.0
Reviews
1 / 20
2.0
MediocreMike,Aug 2025
OKC - AUS
Food
7.0
Boarding
8.1
Overall
8.0
Entertainment
7.5
Crew
8.6
Comfort
8.0
Reviews
1 / 20
2.0
MediocreMike,Aug 2025
OKC - AUS
Food
7.0
Boarding
8.1
Overall
8.0
Entertainment
7.5
Crew
8.6
Comfort
8.0
Reviews
1 / 20
2.0
MediocreMike,Aug 2025
OKC - AUS
Food
7.0
Boarding
8.1
Overall
8.0
Entertainment
7.5
Crew
8.6
Comfort
8.0
Reviews
1 / 20
2.0
MediocreMike,Aug 2025
OKC - AUS
Food
7.0
Boarding
8.1
Overall
8.0
Entertainment
7.5
Crew
8.6
Comfort
8.0
Reviews
1 / 20
2.0
MediocreMike,Aug 2025
OKC - AUS
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 September 11, 2025.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$135 | Average$278 | FlexibilityNo cancel fee | On-time65% | |
| Cheapest$137 | Average$246 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$162 | Average$335 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$238 | Average$478 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$257 | Average$467 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$333 | Average$482 | FlexibilityNo cancel fee | On-time71% |