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$124+ Cheap flights from Costa Rica 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 8/30. Fares are subject to change and may not be available on all flights or dates of travel.
SJO — ORD
ago. 5 — ago. 121
mar. 8/5
mar. 8/12
1 adult, Economy
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Cheap flight deals from Costa Rica to Illinois

Keep the following information in mind while searching for Costa Rica to Illinois flight deals. Data was last updated julio 31, 2025.

Round-trip from

$226
(American Airlines)

One-way from

$124
(FlightHub)

Popular in

December

Cheapest in

August

Average price

$467

Good round-trip deal

$446 or less

Good one-way deal

$253 or less
From Costa Rica to Illinois
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One-way flight from Costa Rica to Illinois
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Highest demand for flights based on searches. 2% potential increase in price ($13 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($8 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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Price to beat on a round-trip flight from Costa Rica to Illinois.
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Price to beat on a one-way flight from Costa Rica to Illinois.
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Find flight deals from Costa Rica to Illinois

Cheapest flights from Costa Rica to Illinois
Explore the most affordable flight options available from Costa Rica to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on julio 31, 2025.

This American Airlines 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 9/36:00 amSJO - STL
1 stop16h 59mAmerican Airlines
mar. 10/148:49 amSTL - SJO
1 stop10h 27mAmerican Airlines
Deal found 7/29$226
This Mytrip deal was found by Cheapflights users on 7/31. 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.
lun. 9/227:30 amSJO - ORD
1 stop13h 28mMultiple Airlines
sáb. 9/2711:37 amORD - SJO
2 stops24h 37mMultiple Airlines
Deal found 7/31$265
This FlightHub deal was found by Cheapflights users on 7/31. 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.
jue. 9/411:37 amSJO - ORD
1 stop9h 21mSpirit Airlines
sáb. 9/611:57 amORD - SJO
2 stops23h 30mSpirit Airlines
Deal found 7/31$266
This FlightHub deal was found by Cheapflights users on 7/30. 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.
mié. 9/312:18 pmSJO - STL
1 stop20h 22mSpirit Airlines
mar. 10/1410:35 amSTL - SJO
1 stop25h 39mSpirit Airlines
Deal found 7/30$310
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 9/47:55 amSJO - STL
1 stop25h 02mUnited Airlines
dom. 10/126:15 amSTL - SJO
1 stop14h 22mUnited Airlines
Deal found 7/29$320
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 8/278:50 amSJO - STL
1 stop10h 10mSouthwest
mar. 9/27:45 amSTL - SJO
1 stop12h 10mSouthwest
Deal found 7/29$329
This Mytrip deal was found by Cheapflights users on 7/31. 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.
sáb. 8/91:47 pmSJO - MDW
1 stop23h 00mFrontier
sáb. 12/66:00 amMDW - SJO
1 stop7h 32mFrontier
Deal found 7/31$351
This Avianca 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 Avianca is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 8/289:35 amSJO - STL
2 stops11h 33mMultiple Airlines
mié. 9/38:20 amSTL - SJO
2 stops11h 25mMultiple Airlines
Deal found 7/29$380
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 9/241:40 pmSJO - MDW
1 stop8h 40mSouthwest
mar. 9/306:25 amMDW - SJO
1 stop13h 30mSouthwest
Deal found 7/29$384
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 10/151:20 pmLIR - ORD
1 stop9h 54mUnited Airlines
vie. 10/179:44 pmORD - LIR
1 stop18h 41mUnited Airlines
Deal found 7/28$387
This Mytrip 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 9/1111:37 amSJO - MDW
3 stops28h 06mMultiple Airlines
lun. 9/1512:50 pmMDW - SJO
3 stops22h 37mMultiple Airlines
Deal found 7/29$414
This American Airlines deal was found by Cheapflights users on 7/31. 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.
vie. 9/52:02 pmLIR - ORD
1 stop18h 45mAmerican Airlines
dom. 9/147:25 pmORD - LIR
1 stop17h 24mAmerican Airlines
Deal found 7/31$475

Cheapflights Fare Finder

 
Customize your flight search to find flights from Costa Rica 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 julio 31, 2025.
Use the filters below to find and compare flights from Costa Rica to Illinois that are best for you.

Fly from

Costa Rica

Fly to

Illinois

Route

Depart

Return

Price

San JoséSt. Louis

SJO - STL

SJOSTL

San José Juan Santamaria Intl

mié. 9/3

6:00 am-11:59 pm

1 stop16h 59m

Lambert-St Louis

mar. 10/14

8:49 am-6:16 pm

1 stop10h 27m

$226

San JoséChicago

SJO - ORD

SJOORD

San José Juan Santamaria Intl

lun. 9/22

7:30 am-9:58 pm

1 stop13h 28m

Chicago O'Hare Intl

sáb. 9/27

11:37 am-11:14 am

2 stops24h 37m

$265

San JoséChicago

SJO - ORD

SJOORD

San José Juan Santamaria Intl

jue. 9/4

11:37 am-9:58 pm

1 stop9h 21m

Chicago O'Hare Intl

sáb. 9/6

11:57 am-10:27 am

2 stops23h 30m

$266

San JoséSt. Louis

SJO - STL

SJOSTL

San José Juan Santamaria Intl

mié. 9/3

12:18 pm-9:40 am

1 stop20h 22m

Lambert-St Louis

mar. 10/14

10:35 am-11:14 am

1 stop25h 39m

$310

San JoséSt. Louis

SJO - STL

SJOSTL

San José Juan Santamaria Intl

jue. 9/4

7:55 am-9:57 am

1 stop25h 02m

Lambert-St Louis

dom. 10/12

6:15 am-7:37 pm

1 stop14h 22m

$320

San JoséSt. Louis

SJO - STL

SJOSTL

San José Juan Santamaria Intl

mié. 8/27

8:50 am-8:00 pm

1 stop10h 10m

Lambert-St Louis

mar. 9/2

7:45 am-6:55 pm

1 stop12h 10m

$329

San JoséChicago

SJO - MDW

SJOMDW

San José Juan Santamaria Intl

sáb. 8/9

1:47 pm-1:47 pm

1 stop23h 00m

Chicago Midway

sáb. 12/6

6:00 am-1:32 pm

1 stop7h 32m

$351

San JoséSt. Louis

SJO - STL

SJOSTL

San José Juan Santamaria Intl

jue. 8/28

9:35 am-10:08 pm

2 stops11h 33m

Lambert-St Louis

mié. 9/3

8:20 am-6:45 pm

2 stops11h 25m

$380

San JoséChicago

SJO - MDW

SJOMDW

San José Juan Santamaria Intl

mié. 9/24

1:40 pm-11:20 pm

1 stop8h 40m

Chicago Midway

mar. 9/30

6:25 am-6:55 pm

1 stop13h 30m

$384

LiberiaChicago

LIR - ORD

LIRORD

Liberia

mié. 10/15

1:20 pm-12:14 am

1 stop9h 54m

Chicago O'Hare Intl

vie. 10/17

9:44 pm-3:25 pm

1 stop18h 41m

$387

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/31

Showing 1-10 of 32 results
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Best time to book a flight from Costa Rica to Illinois

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

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

Currently, August is the cheapest month in which you can book a flight from Costa Rica to Illinois (average of $245). Flying from Costa Rica 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 CR to IL?

Find hourly flight availability from Costa Rica 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 julio 31, 2025.

When flying from Costa Rica 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.

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 julio 31, 2025.
Read reviews from past customers who have flown Alaska Airlines, Southwest, and Delta from Costa Rica to Illinois. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Boarding

8.1

Food

7.1

Crew

8.5

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

YEG - SEA

Alaska airline excellent airline pilot smooth, landing, crew staff very nice friendly behave
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Boarding

8.1

Food

7.1

Crew

8.5

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

YEG - SEA

Alaska airline excellent airline pilot smooth, landing, crew staff very nice friendly behave
Southwest
8.0
Very good
4,246 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Boarding

8.1

Food

7.1

Crew

8.5

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

YEG - SEA

Alaska airline excellent airline pilot smooth, landing, crew staff very nice friendly behave
Delta
8.0
Very good
7,981 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Boarding

8.1

Food

7.1

Crew

8.5

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

YEG - SEA

Alaska airline excellent airline pilot smooth, landing, crew staff very nice friendly behave
United Airlines
7.4
Good
8,900 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Boarding

8.1

Food

7.1

Crew

8.5

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

YEG - SEA

Alaska airline excellent airline pilot smooth, landing, crew staff very nice friendly behave
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Boarding

8.1

Food

7.1

Crew

8.5

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

YEG - SEA

Alaska airline excellent airline pilot smooth, landing, crew staff very nice friendly behave

Related info for your journey

Find useful and relevant information for your journey from Costa Rica to Illinois. 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 Costa Rica to Illinois one-way?

    The cheapest airlines for a one-way flight from Costa Rica to Illinois are Spirit Airlines ($124), American Airlines ($137), and Frontier ($180).

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

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

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

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

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

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

    Currently, August is the cheapest month in which you can book a flight from Costa Rica to Illinois (average of $245). Flying from Costa Rica 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.

See more FAQs

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Alternative routes for Costa Rica to Illinois

See prices for flight routes from nearby airports that may be better suited for you.
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San José to John F Kennedy Intl flights
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San José to San Francisco flights
San José to George Bush Intcntl flights
San Pedro Sula to Hobby flights
Guatemala City to Ontario flights
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Top 6 airlines flying from Costa Rica to Illinois

Discover the top 6 airlines that operate flights from Costa Rica 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 julio 31, 2025.
AirlineCheapestAverageFlexibilityOn-time
AviancaCheapest$261Average$462FlexibilityNo cancel feeOn-time71%
Spirit AirlinesCheapest$266Average$414FlexibilityNo cancel feeOn-time65%
Copa AirlinesCheapest$314Average$486FlexibilityNo cancel feeOn-time70%
American AirlinesCheapest$340Average$481FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$425Average$527FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$436Average$630FlexibilityNo cancel feeOn-time69%

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