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$86+ 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 2/3. Fares are subject to change and may not be available on all flights or dates of travel.
SJU — ORD
Jan 27 — Feb 31
Tue 1/27
Tue 2/3
1 adult, Economy
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Cheap flight deals from Luis Munoz Marin Intl to Illinois

Cheapest flights from Luis Munoz Marin Intl to Illinois
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 December 28, 2025.

This FlightHub deal was found by Cheapflights users on 12/26. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/266:28 pmSJU - ORD
1 stop8h 02mSpirit Airlines
Sun 1/45:45 amORD - SJU
Nonstop4h 41mSpirit Airlines
Deal found 12/26$223
This Kiwi.com deal was found by Cheapflights users on 12/26. 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 12/276:28 pmSJU - ORD
1 stop8h 02mMultiple Airlines
Wed 1/79:34 amORD - SJU
1 stop15h 39mMultiple Airlines
Deal found 12/26$251
This Kiwi.com deal was found by Cheapflights users on 12/26. 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 12/276:28 pmSJU - ORD
1 stop8h 02mMultiple Airlines
Fri 1/97:20 amORD - SJU
1 stop14h 24mMultiple Airlines
Deal found 12/26$254
This JetBlue deal was found by Cheapflights users on 12/26. 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.
Fri 12/262:21 pmSJU - ORD
1 stop9h 43mJetBlue
Tue 1/69:35 amORD - SJU
1 stop7h 48mJetBlue
Deal found 12/26$260
This Kiwi.com deal was found by Cheapflights users on 12/26. 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 12/276:28 pmSJU - ORD
1 stop8h 02mMultiple Airlines
Thu 1/83:32 pmORD - SJU
1 stop7h 27mMultiple Airlines
Deal found 12/26$265
This JetBlue deal was found by Cheapflights users on 12/26. 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.
Fri 12/262:21 pmSJU - ORD
1 stop9h 43mJetBlue
Sun 1/46:45 amORD - SJU
1 stop10h 04mJetBlue
Deal found 12/26$274
This JetBlue deal was found by Cheapflights users on 12/26. 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.
Sat 12/272:20 pmSJU - ORD
1 stop9h 44mJetBlue
Mon 1/56:45 amORD - SJU
1 stop7h 41mJetBlue
Deal found 12/26$277
This Kiwi.com deal was found by Cheapflights users on 12/26. 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 12/276:28 pmSJU - ORD
1 stop8h 02mSpirit Airlines
Wed 1/75:45 amORD - SJU
Nonstop4h 41mSpirit Airlines
Deal found 12/26$284
This Expedia deal was found by Cheapflights users on 12/27. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/318:08 pmSJU - ORD
Nonstop5h 17mMultiple Airlines
Sat 1/108:27 pmORD - SJU
1 stop10h 27mMultiple Airlines
Deal found 12/27$286
This Cheapflightsfares deal was found by Cheapflights users on 12/26. 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 12/298:08 pmSJU - ORD
Nonstop5h 17mSpirit Airlines
Sat 1/1012:17 pmORD - SJU
Nonstop4h 32mSpirit Airlines
Deal found 12/26$287
This SmartFares deal was found by Cheapflights users on 12/27. 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 12/312:21 pmSJU - ORD
1 stop9h 43mJetBlue
Sat 1/107:45 amORD - SJU
1 stop8h 20mJetBlue
Deal found 12/27$289
This American Airlines deal was found by Cheapflights users on 12/27. 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.
Wed 12/318:25 amSJU - ORD
1 stop7h 47mAmerican Airlines
Tue 1/63:00 pmORD - SJU
Nonstop4h 39mAmerican Airlines
Deal found 12/27$291

Find 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 December 28, 2025.

Round-trip from

$163
(eDestinos)

One-way from

$86
(Priceline)

Popular in

December

Cheapest in

February

Average price

$427

Good round-trip deal

$250 or less

Good one-way deal

$166 or less
From San Juan Luis Munoz Marin Intl to Illinois
Search Deals
One-way flight from San Juan Luis Munoz Marin Intl to Illinois
Search Deals
Highest demand for flights based on searches. 5% potential increase in price ($18 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($10 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals
Price to beat on a round-trip flight from San Juan Luis Munoz Marin Intl to Illinois.
Search Deals
Price to beat on a one-way flight from San Juan Luis Munoz Marin Intl to Illinois.
Search Deals

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 December 28, 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 JuanChicago

SJU - ORD

SJUORD

San Juan Luis Munoz Marin Intl

Wed 2/25

5:10 am-12:04 pm

1 stop8h 54m

Chicago O'Hare Intl

Wed 3/4

12:59 pm-12:29 am

1 stop9h 30m

$168

San JuanChicago

SJU - ORD

SJUORD

San Juan Luis Munoz Marin Intl

Tue 1/13

1:22 pm-4:37 pm

Nonstop5h 15m

Chicago O'Hare Intl

Wed 1/21

7:45 am-6:05 pm

1 stop8h 20m

$169

San JuanChicago

SJU - ORD

SJUORD

San Juan Luis Munoz Marin Intl

Fri 2/27

11:52 am-6:08 pm

1 stop8h 16m

Chicago O'Hare Intl

Sun 3/1

6:40 am-5:58 pm

1 stop9h 18m

$171

San JuanSt. Louis

SJU - STL

SJUSTL

San Juan Luis Munoz Marin Intl

Sat 1/24

4:36 pm-11:33 pm

1 stop8h 57m

Lambert-St Louis

Sat 1/31

5:42 pm-9:54 am

1 stop14h 12m

$176

San JuanSt. Louis

SJU - STL

SJUSTL

San Juan Luis Munoz Marin Intl

Thu 1/29

4:36 pm-11:33 pm

1 stop8h 57m

Lambert-St Louis

Mon 2/2

10:16 am-11:59 pm

1 stop11h 43m

$180

San JuanChicago

SJU - MDW

SJUMDW

San Juan Luis Munoz Marin Intl

Thu 1/29

4:22 pm-10:19 pm

1 stop7h 57m

Chicago Midway

Mon 2/2

1:00 pm-11:59 pm

1 stop8h 59m

$180

San JuanChicago

SJU - MDW

SJUMDW

San Juan Luis Munoz Marin Intl

Thu 2/19

4:25 pm-2:26 pm

1 stop24h 01m

Chicago Midway

Mon 2/23

9:22 pm-12:43 am

1 stop25h 21m

$180

San JuanChicago

SJU - ORD

SJUORD

San Juan Luis Munoz Marin Intl

Mon 2/23

3:53 am-3:52 pm

1 stop13h 59m

Chicago O'Hare Intl

Mon 3/2

2:13 pm-2:25 am

1 stop10h 12m

$180

San JuanChicago

SJU - ORD

SJUORD

San Juan Luis Munoz Marin Intl

Fri 2/6

9:25 am-7:31 pm

1 stop12h 06m

Chicago O'Hare Intl

Tue 2/10

9:40 am-7:23 pm

1 stop7h 43m

$182

San JuanChicago

SJU - ORD

SJUORD

San Juan Luis Munoz Marin Intl

Thu 1/15

11:06 am-7:36 pm

1 stop10h 30m

Chicago O'Hare Intl

Mon 1/19

10:15 am-7:26 pm

1 stop7h 11m

$190

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/26

Showing 1-10 of 60 results
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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 $121). Flying from San Juan Luis Munoz Marin Intl Airport to Illinois in June is currently the most expensive (average of $175). 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 December 28, 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 53% 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 February 10, 2025.

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. Sunday afternoons 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 December 28, 2025.

The most flights from SJU to USIL are scheduled on a Monday (12 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (12 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 December 28, 2025.
Get a feel of what it's like to fly with United Airlines, American Airlines, and JetBlue 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.
United Airlines
7.4
Good
9,114 reviews

Crew

8.1

Food

6.6

Comfort

7.3

Entertainment

7.1

Boarding

7.7

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Michelle,Dec 2025

DEN - MKE

I liked that the plane waited 5 minutes for a family whose incoming plane was late. This was the last flight of the day to MKE. Flight attendants actually checked in throughout the flight. Although, not really friendly. Happy to see screens on seat backs again. This is my first time not flying first class in over 10 years. It was economy plus.
United Airlines
7.4
Good
9,114 reviews
United Airlines
7.4
Good
9,114 reviews

Crew

8.1

Food

6.6

Comfort

7.3

Entertainment

7.1

Boarding

7.7

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Michelle,Dec 2025

DEN - MKE

I liked that the plane waited 5 minutes for a family whose incoming plane was late. This was the last flight of the day to MKE. Flight attendants actually checked in throughout the flight. Although, not really friendly. Happy to see screens on seat backs again. This is my first time not flying first class in over 10 years. It was economy plus.
American Airlines
7.2
Good
11,071 reviews
United Airlines
7.4
Good
9,114 reviews

Crew

8.1

Food

6.6

Comfort

7.3

Entertainment

7.1

Boarding

7.7

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Michelle,Dec 2025

DEN - MKE

I liked that the plane waited 5 minutes for a family whose incoming plane was late. This was the last flight of the day to MKE. Flight attendants actually checked in throughout the flight. Although, not really friendly. Happy to see screens on seat backs again. This is my first time not flying first class in over 10 years. It was economy plus.
JetBlue
7.2
Good
2,901 reviews
United Airlines
7.4
Good
9,114 reviews

Crew

8.1

Food

6.6

Comfort

7.3

Entertainment

7.1

Boarding

7.7

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Michelle,Dec 2025

DEN - MKE

I liked that the plane waited 5 minutes for a family whose incoming plane was late. This was the last flight of the day to MKE. Flight attendants actually checked in throughout the flight. Although, not really friendly. Happy to see screens on seat backs again. This is my first time not flying first class in over 10 years. It was economy plus.
Spirit Airlines
6.3
Okay
8,212 reviews
United Airlines
7.4
Good
9,114 reviews

Crew

8.1

Food

6.6

Comfort

7.3

Entertainment

7.1

Boarding

7.7

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Michelle,Dec 2025

DEN - MKE

I liked that the plane waited 5 minutes for a family whose incoming plane was late. This was the last flight of the day to MKE. Flight attendants actually checked in throughout the flight. Although, not really friendly. Happy to see screens on seat backs again. This is my first time not flying first class in over 10 years. It was economy plus.
Frontier
5.8
Fair
3,064 reviews
United Airlines
7.4
Good
9,114 reviews

Crew

8.1

Food

6.6

Comfort

7.3

Entertainment

7.1

Boarding

7.7

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Michelle,Dec 2025

DEN - MKE

I liked that the plane waited 5 minutes for a family whose incoming plane was late. This was the last flight of the day to MKE. Flight attendants actually checked in throughout the flight. Although, not really friendly. Happy to see screens on seat backs again. This is my first time not flying first class in over 10 years. It was economy plus.

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.

  • How long is the flight from San Juan Luis Munoz Marin Intl Airport to Illinois?

    A quick flight from San Juan Luis Munoz Marin Intl Airport to Illinois can take about 8h 54m. JetBlue provides one of the quickest options available for as low as $168. There are 2073 mi between San Juan Luis Munoz Marin Intl Airport and Illinois. This flight may include one or multiple stops.

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

    The cheapest airline one-way is JetBlue, with whom users have recently found tickets for as low as $71. However, be on the lookout for offers from Frontier and Spirit Airlines, as they are both options that can get you from San Juan Luis Munoz Marin Intl Airport to Illinois for a low price.

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

    While some choose either San Juan Luis Munoz Marin Intl - Chicago Midway or San Juan Luis Munoz Marin Intl - Lambert-St Louis, San Juan Luis Munoz Marin Intl - Chicago O'Hare Intl is the most popular route from San Juan Luis Munoz Marin Intl Airport to Illinois.

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

    Before booking your flight to Illinois from San Juan Luis Munoz Marin Intl Airport, check out the most reliable airlines to get you to your destination on time: Spirit Airlines (87%), Air Canada (82%), United Airlines( 82%).

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

    On average you can expect to pay $455 for a flight from San Juan Luis Munoz Marin Intl Airport to Illinois. The cheapest flight overall is $108 while the most popular route, (San Juan Luis Munoz Marin Intl - Chicago O'Hare Intl) is currently priced at $144.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Luis Munoz Marin Intl to Illinois 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 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 $121). Flying from San Juan Luis Munoz Marin Intl Airport to Illinois in June is currently the most expensive (average of $175). 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.

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Alternative routes for Luis Munoz Marin Intl to Illinois

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Top 7 airlines flying from Luis Munoz Marin Intl to Illinois

Discover the top 7 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 December 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest$120Average$228FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$137Average$278FlexibilityNo cancel feeOn-time65%
FrontierCheapest$138Average$258FlexibilityNo cancel feeOn-time62%
DeltaCheapest$162Average$538FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$254Average$486FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$277Average$484FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$419Average$566FlexibilityNo cancel feeOn-time63%

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