$69+ 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 12/6. Fares are subject to change and may not be available on all flights or dates of travel.
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
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 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 November 6, 2025.
Round-trip from | $138 (Frontier) |
|---|---|
One-way from | $69 (Frontier) |
Popular in | August |
Cheapest in | January |
Average price | $285 |
Good round-trip deal | $339 or less |
Good one-way deal | $179 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 November 6, 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 November 6, 2025.
This CheapOair deal was found by Cheapflights users on 11/5. 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 Kiwi.com deal was found by Cheapflights users on 11/5. 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.
This eDestinos deal was found by Cheapflights users on 11/6. 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.
This Kiwi.com deal was found by Cheapflights users on 11/6. 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.
This eDestinos deal was found by Cheapflights users on 11/4. 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.
This Kiwi.com deal was found by Cheapflights users on 11/5. 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.
This Kiwi.com deal was found by Cheapflights users on 11/4. 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.
This Cheapflightsfares deal was found by Cheapflights users on 11/6. 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 Mytrip deal was found by Cheapflights users on 11/6. 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.
This Cheapflightsfares deal was found by Cheapflights users on 11/6. 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 Frontier deal was found by Cheapflights users on 11/6. 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 eDestinos deal was found by Cheapflights users on 11/6. 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.
Cheapflights Fare Finder
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
Fly to
Route
Depart
Return
Price
San JuanSt. Louis
SJU - STL
SJUSTL
San Juan Luis Munoz Marin Intl
Thu 1/29
3:55 am-10:33 pm
1 stop20h 38m
Lambert-St Louis
Mon 2/9
5:11 pm-9:55 am
1 stop14h 44m
San JuanChicago
SJU - ORD
SJUORD
San Juan Luis Munoz Marin Intl
Thu 2/26
8:35 am-11:57 am
Nonstop5h 22m
Chicago O'Hare Intl
Mon 3/2
2:20 pm-9:00 pm
Nonstop4h 40m
San JuanSt. Louis
SJU - STL
SJUSTL
San Juan Luis Munoz Marin Intl
Tue 1/20
11:05 am-10:33 pm
1 stop13h 28m
Lambert-St Louis
Fri 1/23
5:11 pm-2:50 am
1 stop7h 39m
San JuanChicago
SJU - MDW
SJUMDW
San Juan Luis Munoz Marin Intl
Fri 1/23
7:30 am-12:01 pm
1 stop6h 31m
Chicago Midway
Tue 2/3
12:48 pm-8:57 pm
1 stop6h 09m
San JuanChicago
SJU - ORD
SJUORD
San Juan Luis Munoz Marin Intl
Thu 11/20
4:12 pm-7:23 pm
Nonstop5h 11m
Chicago O'Hare Intl
Sun 11/23
10:12 am-8:27 pm
1 stop8h 15m
San JuanChicago
SJU - MDW
SJUMDW
San Juan Luis Munoz Marin Intl
Wed 12/24
4:16 pm-5:38 pm
1 stop27h 22m
Chicago Midway
Sat 1/3
2:24 pm-2:39 am
1 stop10h 15m
San JuanChicago
SJU - ORD
SJUORD
San Juan Luis Munoz Marin Intl
Mon 1/26
2:38 pm-6:00 pm
Nonstop5h 22m
Chicago O'Hare Intl
Sun 2/1
4:35 pm-11:18 pm
Nonstop4h 43m
San JuanSt. Louis
SJU - STL
SJUSTL
San Juan Luis Munoz Marin Intl
Fri 1/30
4:52 pm-10:58 pm
1 stop8h 06m
Lambert-St Louis
Mon 2/9
9:57 am-12:36 am
2 stops12h 39m
San JuanChicago
SJU - ORD
SJUORD
San Juan Luis Munoz Marin Intl
Thu 12/4
8:45 pm-11:59 pm
Nonstop5h 14m
Chicago O'Hare Intl
Sun 12/7
1:52 pm-11:25 pm
1 stop7h 33m
San JuanChicago
SJU - ORD
SJUORD
San Juan Luis Munoz Marin Intl
Sun 1/25
3:55 am-9:58 pm
2 stops20h 03m
Chicago O'Hare Intl
Sun 2/1
5:20 am-3:06 pm
1 stop7h 46m
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.
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, January is the cheapest month in which you can book a flight from San Juan Luis Munoz Marin Intl Airport to Illinois (average of $116). Flying from San Juan Luis Munoz Marin Intl Airport to Illinois in June is currently the most expensive (average of $193). 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 November 6, 2025.
One of the essential ways to save on airfare from San Juan Luis Munoz Marin Intl Airport to Illinois is to remain as flexible as possible. Flights that are in the afternoon tend to be the most expensive. A flight in the evening could potentially save you up to 65% on airfare.
What is the cheapest day to fly from San Juan Luis Munoz Marin Intl Airport to Illinois?
Use this chart to determine the cheapest time to fly round-trip from Luis Munoz Marin Intl to Illinois. Price data was last updated on December 16, 2024.
Travelers seeking maximum savings on their San Juan Luis Munoz Marin Intl Airport to Illinois flight should consider departing on Thursday afternoons when fares are most often at their lowest. Monday at noon flights should be avoided if possible as fares are typically the most expensive at this time.
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 November 6, 2025.
The most flights from SJU to USIL are scheduled on a Monday (8 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (6 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 November 6, 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
Comfort
Boarding
Overall
Crew
Entertainment
Reviews
Mike,Aug 2025
OKC - AUS
Food
Comfort
Boarding
Overall
Crew
Entertainment
Reviews
Mike,Aug 2025
OKC - AUS
Food
Comfort
Boarding
Overall
Crew
Entertainment
Reviews
Mike,Aug 2025
OKC - AUS
Food
Comfort
Boarding
Overall
Crew
Entertainment
Reviews
Mike,Aug 2025
OKC - AUS
Food
Comfort
Boarding
Overall
Crew
Entertainment
Reviews
Mike,Aug 2025
OKC - AUS
Food
Comfort
Boarding
Overall
Crew
Entertainment
Reviews
Mike,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 November 6, 2025.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$137 | Average$279 | FlexibilityNo cancel fee | On-time65% | |
| Cheapest$139 | Average$261 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$162 | Average$487 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$290 | Average$485 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$334 | Average$482 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$384 | Average$516 | FlexibilityNo cancel fee | On-time63% |