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$132+ Cheap flights from Illinois to Costa Rica

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 7/6. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — SJO
Jun 20 — Jun 271
Fri 6/20
Fri 6/27
1 adult, Economy
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Cheap flight deals from Illinois to Costa Rica

Keep the following information in mind while searching for Illinois to Costa Rica flight deals. Data was last updated June 15, 2025.

Round-trip from

$286
(Delta)

One-way from

$132
(United Airlines)

Popular in

December

Cheapest in

July

Average price

$557

Good round-trip deal

$493 or less

Good one-way deal

$202 or less
From Illinois to Costa Rica
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One-way flight from Illinois to Costa Rica
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Highest demand for flights based on searches. 9% potential increase in price ($62 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($12 potential savings vs. average RT price).
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Average for round-trip flights in June 2025
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Price to beat on a round-trip flight from Illinois to Costa Rica.
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Price to beat on a one-way flight from Illinois to Costa Rica.
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Find flight deals from Illinois to Costa Rica

Cheapest flights from Illinois to Costa Rica
Explore the most affordable flight options available from Illinois to Costa Rica. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 15, 2025.

This Delta deal was found by Cheapflights users on 6/14. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/176:00 amSTL - SJO
1 stop6h 52mDelta
Wed 11/267:00 amSJO - STL
1 stop11h 02mDelta
Deal found 6/14$286
This Mytrip deal was found by Cheapflights users on 6/14. 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.
Tue 7/810:46 amORD - SJO
2 stops25h 25mSpirit Airlines
Tue 7/2211:24 amSJO - ORD
2 stops19h 26mSpirit Airlines
Deal found 6/14$305
This Copa Airlines deal was found by Cheapflights users on 6/13. 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 Copa Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/207:54 amORD - SJO
1 stop9h 40mCopa Airlines
Sun 10/2610:05 amSJO - ORD
1 stop13h 16mCopa Airlines
Deal found 6/13$310
This Trip.com deal was found by Cheapflights users on 6/14. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/87:56 amORD - SJO
1 stop8h 17mMultiple Airlines
Tue 7/225:05 amSJO - ORD
1 stop10h 00mMultiple Airlines
Deal found 6/14$314
This American Airlines deal was found by Cheapflights users on 6/14. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/18:01 pmSTL - LIR
2 stops19h 09mAmerican Airlines
Wed 11/51:55 pmLIR - STL
1 stop9h 06mAmerican Airlines
Deal found 6/14$315
This American Airlines deal was found by Cheapflights users on 6/13. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/256:05 pmSTL - SJO
2 stops18h 05mAmerican Airlines
Sat 12/136:34 amSJO - STL
2 stops12h 30mAmerican Airlines
Deal found 6/13$337
This Southwest deal was found by Cheapflights users on 6/13. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/35:40 amSTL - SJO
1 stop6h 20mSouthwest
Tue 8/128:50 amSJO - STL
1 stop10h 10mSouthwest
Deal found 6/13$340
This Booking.com deal was found by Cheapflights users on 6/14. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/253:45 pmORD - SJO
1 stop8h 30mAvianca
Thu 7/315:05 amSJO - ORD
1 stop10h 00mAvianca
Deal found 6/14$373
This United Airlines deal was found by Cheapflights users on 6/12. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/295:00 amSTL - LIR
1 stop7h 53mUnited Airlines
Tue 7/811:49 amLIR - STL
1 stop11h 10mUnited Airlines
Deal found 6/12$385
This American Airlines deal was found by Cheapflights users on 6/14. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/39:51 amORD - SJO
2 stops10h 51mAmerican Airlines
Mon 9/812:12 pmSJO - ORD
2 stops10h 36mAmerican Airlines
Deal found 6/14$386
This United Airlines deal was found by Cheapflights users on 6/14. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/166:43 pmSTL - SJO
2 stops16h 42mUnited Airlines
Wed 11/2612:35 pmSJO - STL
2 stops23h 38mUnited Airlines
Deal found 6/14$390
This Southwest deal was found by Cheapflights users on 6/14. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/245:00 amMDW - SJO
1 stop8h 00mSouthwest
Mon 10/271:30 pmSJO - MDW
1 stop10h 15mSouthwest
Deal found 6/14$403

Cheapflights Fare Finder

Customize your flight search to find flights from Illinois to Costa Rica 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 June 15, 2025.
Use the filters below to find and compare flights from Illinois to Costa Rica that are best for you.

Fly from

Illinois

Fly to

Costa Rica

Route

Depart

Return

Price

St. LouisSan José

STL - SJO

STLSJO

Lambert-St Louis

Mon 11/17

6:00 am-12:52 pm

1 stop6h 52m

San José Juan Santamaria Intl

Wed 11/26

7:00 am-6:02 pm

1 stop11h 02m

$286

ChicagoSan José

ORD - SJO

ORDSJO

Chicago O'Hare Intl

Tue 7/8

10:46 am-11:11 am

2 stops25h 25m

San José Juan Santamaria Intl

Tue 7/22

11:24 am-7:50 am

2 stops19h 26m

$305

ChicagoSan José

ORD - SJO

ORDSJO

Chicago O'Hare Intl

Tue 7/8

7:49 pm-10:29 am

1 stop15h 40m

San José Juan Santamaria Intl

Tue 7/22

5:05 am-4:05 pm

1 stop10h 00m

$310

St. LouisLiberia

STL - LIR

STLLIR

Lambert-St Louis

Sat 11/1

8:01 pm-2:10 pm

2 stops19h 09m

Liberia

Wed 11/5

1:55 pm-8:15 am

2 stops18h 20m

$315

St. LouisSan José

STL - SJO

STLSJO

Lambert-St Louis

Sat 10/25

6:05 pm-11:10 am

2 stops18h 05m

San José Juan Santamaria Intl

Sat 12/13

6:34 am-7:04 pm

2 stops12h 30m

$337

St. LouisSan José

STL - SJO

STLSJO

Lambert-St Louis

Sun 8/3

5:40 am-11:00 am

1 stop6h 20m

San José Juan Santamaria Intl

Tue 8/12

8:50 am-8:00 pm

1 stop10h 10m

$340

ChicagoSan José

ORD - SJO

ORDSJO

Chicago O'Hare Intl

Fri 6/27

3:07 pm-7:35 am

1 stop17h 28m

San José Juan Santamaria Intl

Sun 7/6

6:07 pm-1:42 pm

1 stop18h 35m

$356

ChicagoSan José

ORD - SJO

ORDSJO

Chicago O'Hare Intl

Fri 7/25

3:45 pm-11:15 pm

1 stop8h 30m

San José Juan Santamaria Intl

Thu 7/31

5:05 am-4:05 pm

1 stop10h 00m

$373

St. LouisLiberia

STL - LIR

STLLIR

Lambert-St Louis

Sun 6/29

5:00 am-11:53 am

1 stop7h 53m

Liberia

Tue 7/8

11:49 am-11:59 pm

1 stop11h 10m

$385

ChicagoSan José

ORD - SJO

ORDSJO

Chicago O'Hare Intl

Wed 9/3

9:51 am-7:42 pm

2 stops10h 51m

San José Juan Santamaria Intl

Mon 9/8

12:12 pm-11:48 pm

2 stops10h 36m

$386

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/12

Showing 1-10 of 55 results
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Best time to book a flight from Illinois to Costa Rica

Have a flexible travel schedule? Discover the best time to fly to Costa Rica 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 Costa Rica

What is the cheapest month to book a flight from Illinois to Costa Rica?

Currently, September is the cheapest month in which you can book a flight from Illinois to Costa Rica (average of $398). Flying from Illinois to Costa Rica in March is currently the most expensive (average of $555). 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 CR?

Find hourly flight availability from Illinois to Costa Rica. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated June 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 Costa Rica as you normally would.

Rainfall in Costa Rica by month

Plan your trip to Costa Rica by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Costa Rica ranges from 0.0 - 11.8 inches per month. September is typically the wettest month, when rainfall can reach 11.8 in. February is typically the driest time to visit Costa Rica when rainfall is around 0.0 in.

Temperature in Costa Rica by month

Plan your trip to Costa Rica by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Costa Rica, use this chart to help with planning. For those seeking warmer temperatures, April is the ideal time of year to visit, when temperatures reach an average of 69.8 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 64.4 F).

Reviews of airlines servicing Costa Rica

Get insights into the airlines that provide service to Costa Rica. 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 Costa Rica. Reviews last updated June 15, 2025.
Get a feel of what it's like to fly with Delta, Alaska Airlines and Southwest from Illinois to Costa Rica by reading reviews from past customers. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,963 reviews

Food

7.3

Overall

8.0

Entertainment

7.9

Comfort

7.9

Boarding

8.2

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,963 reviews
Delta
8.0
Very good
7,963 reviews

Food

7.3

Overall

8.0

Entertainment

7.9

Comfort

7.9

Boarding

8.2

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Alaska Airlines
8.0
Very good
10,000 reviews
Delta
8.0
Very good
7,963 reviews

Food

7.3

Overall

8.0

Entertainment

7.9

Comfort

7.9

Boarding

8.2

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Southwest
8.0
Very good
4,285 reviews
Delta
8.0
Very good
7,963 reviews

Food

7.3

Overall

8.0

Entertainment

7.9

Comfort

7.9

Boarding

8.2

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Copa Airlines
7.5
Good
1,451 reviews
Delta
8.0
Very good
7,963 reviews

Food

7.3

Overall

8.0

Entertainment

7.9

Comfort

7.9

Boarding

8.2

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Aeromexico
7.5
Good
1,710 reviews
Delta
8.0
Very good
7,963 reviews

Food

7.3

Overall

8.0

Entertainment

7.9

Comfort

7.9

Boarding

8.2

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Related info for your journey

Find useful and relevant information for your journey from Illinois to Costa Rica. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What are the cheapest airlines to fly from Illinois to Costa Rica one-way?

    For one-way options, check prices for United Airlines. According to our data, you can fly for as low as $132. Users have also found prices from $132 and $135 on Spirit Airlines and Frontier, respectively.

  • Can I find deals for flights from Illinois to Costa Rica that include hotel bookings?

    Yes. In addition to deals on Illinois to Costa Rica flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Illinois to Costa Rica?

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

  • Can I find deals for business class flights from Illinois to Costa Rica?

    Yes. Cheapflights offers flight deals from Illinois to Costa Rica 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 Costa Rica?

    Currently, September is the cheapest month in which you can book a flight from Illinois to Costa Rica (average of $398). Flying from Illinois to Costa Rica in March is currently the most expensive (average of $555). 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

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Alternative routes for Illinois to Costa Rica

See prices for flight routes from nearby airports that may be better suited for you.
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Top 8 airlines flying from Illinois to Costa Rica

Discover the top 8 airlines that operate flights from Illinois to Costa Rica. 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 June 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$274Average$438FlexibilityNo cancel feeOn-time65%
AviancaCheapest$323Average$462FlexibilityNo cancel feeOn-time71%
JetBlueCheapest$345Average$635FlexibilityNo cancel feeOn-time62%
Copa AirlinesCheapest$376Average$607FlexibilityNo cancel feeOn-time70%
DeltaCheapest$408Average$724FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$446Average$736FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$479Average$668FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$493Average$813FlexibilityNo cancel feeOn-time69%

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