$88+ 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 3/26. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — SJO
Feb 25 — Mar 41
1 adult, Economy
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Find cheap flights from Illinois to Costa Rica 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 Illinois to Costa Rica
Keep the following information in mind while searching for Illinois to Costa Rica flight deals. Data was last updated February 20, 2025.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $249 (FlightHub) |
One-way from | $88 (Cheapflightsfares) |
Popular in | December |
Cheapest in | May |
Average price | $637 |
Good round-trip deal | $696 or less |
Good one-way deal | $300 or less |
Find flight deals from Illinois to Costa Rica
Cheapest flights from Illinois to Costa RicaExplore 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 February 20, 2025.
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 February 20, 2025.
This FlightHub deal was found by Cheapflights users on 2/19. 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.
Tue 4/16:47 pmSTL - SJO
1 stop17h 34mSpirit Airlines
Mon 4/712:50 amSJO - STL
1 stop16h 02mSpirit Airlines
Deal found 2/19![Spirit Airlines logo]()
$249
This Kiwi.com deal was found by Cheapflights users on 2/20. 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 4/16:47 pmSTL - SJO
1 stop17h 34mMultiple Airlines
Mon 4/78:46 amSJO - STL
2 stops32h 06mMultiple Airlines
Deal found 2/20![Multiple Airlines logo]()
$320
This FlightHub deal was found by Cheapflights users on 2/19. 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.
Sat 3/15:45 pmORD - SJO
1 stop17h 39mSpirit Airlines
Tue 3/1812:50 amSJO - ORD
2 stops17h 06mSpirit Airlines
Deal found 2/19![Spirit Airlines logo]()
$327
This Kiwi.com deal was found by Cheapflights users on 2/19. 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.
Mon 3/247:25 amMDW - SJO
2 stops28h 56mMultiple Airlines
Tue 4/111:55 amSJO - MDW
1 stop10h 29mMultiple Airlines
Deal found 2/19![Multiple Airlines logo]()
$331
This CheapOair deal was found by Cheapflights users on 2/19. 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.
Mon 2/2412:48 amORD - SJO
1 stop13h 09mMultiple Airlines
Wed 3/51:50 amSJO - ORD
1 stop14h 37mMultiple Airlines
Deal found 2/19![Multiple Airlines logo]()
$332
This American Airlines deal was found by Cheapflights users on 2/19. 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.
Tue 4/15:10 amSTL - SJO
1 stop17h 49mAmerican Airlines
Tue 4/86:05 amSJO - STL
1 stop15h 14mAmerican Airlines
Deal found 2/19![American Airlines logo]()
$428
This JetBlue deal was found by Cheapflights users on 2/19. 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 2/2811:44 amORD - SJO
1 stop10h 04mJetBlue
Tue 3/411:44 pmSJO - ORD
1 stop10h 59mJetBlue
Deal found 2/19![JetBlue logo]()
$431
This Copa Airlines deal was found by Cheapflights users on 2/20. 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.
Sat 3/153:09 pmORD - SJO
1 stop17h 25mCopa Airlines
Thu 3/205:51 amSJO - ORD
1 stop17h 36mCopa Airlines
Deal found 2/20![Copa Airlines logo]()
$436
This Cheapflightsfares deal was found by Cheapflights users on 2/19. 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 2/281:35 pmORD - SJO
1 stop19h 45mAvianca
Mon 3/32:15 amSJO - ORD
1 stop10h 00mAvianca
Deal found 2/19![Avianca logo]()
$460
This United Airlines deal was found by Cheapflights users on 2/19. 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.
Thu 4/108:40 amSTL - LIR
1 stop6h 43mUnited Airlines
Tue 4/153:25 pmLIR - STL
1 stop17h 31mUnited Airlines
Deal found 2/19![United Airlines logo]()
$489
This American Airlines deal was found by Cheapflights users on 2/20. 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.
Mon 4/77:03 pmSTL - LIR
2 stops19h 02mAmerican Airlines
Mon 4/142:26 pmLIR - STL
2 stops17h 04mAmerican Airlines
Deal found 2/20![American Airlines logo]()
$493
This United Airlines deal was found by Cheapflights users on 2/20. 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.
Wed 6/115:55 pmSTL - SJO
1 stop19h 31mUnited Airlines
Thu 6/1911:13 amSJO - STL
1 stop10h 02mUnited Airlines
Deal found 2/20![United Airlines logo]()
$505
Find flights from Illinois to Costa Rica within your budget
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 February 20, 2025.
Fly from
Illinois
Fly to
Costa Rica
Route
Depart
Return
Price
St. LouisSan José
STL - SJO
STLSJO
Lambert-St Louis
Tue 4/1
6:47 pm-11:21 am
1 stop17h 34m
San José Juan Santamaria Intl
Mon 4/7
12:50 am-5:52 pm
1 stop16h 02m
$249
St. LouisSan José
STL - SJO
STLSJO
Lambert-St Louis
Tue 3/4
4:00 pm-12:21 pm
1 stop20h 21m
San José Juan Santamaria Intl
Tue 3/11
11:30 am-11:49 pm
1 stop11h 19m
$280
ChicagoSan José
ORD - SJO
ORDSJO
Chicago O'Hare Intl
Sat 3/1
5:45 pm-11:24 am
1 stop17h 39m
San José Juan Santamaria Intl
Tue 3/18
12:50 am-6:56 pm
2 stops17h 06m
$327
ChicagoSan José
MDW - SJO
MDWSJO
Chicago Midway
Mon 3/24
7:25 am-11:21 am
2 stops28h 56m
San José Juan Santamaria Intl
Tue 4/1
11:55 am-11:24 pm
1 stop10h 29m
$331
ChicagoSan José
ORD - SJO
ORDSJO
Chicago O'Hare Intl
Tue 5/6
5:10 am-11:18 am
1 stop7h 08m
San José Juan Santamaria Intl
Fri 5/16
1:41 pm-11:32 pm
1 stop8h 51m
$331
St. LouisSan José
STL - SJO
STLSJO
Lambert-St Louis
Tue 4/1
5:10 am-9:59 pm
1 stop17h 49m
San José Juan Santamaria Intl
Tue 4/8
6:05 am-10:19 pm
1 stop15h 14m
$428
ChicagoSan José
ORD - SJO
ORDSJO
Chicago O'Hare Intl
Fri 2/28
11:44 am-9:48 pm
1 stop10h 04m
San José Juan Santamaria Intl
Tue 3/4
11:44 pm-10:43 am
1 stop10h 59m
$431
ChicagoSan José
ORD - SJO
ORDSJO
Chicago O'Hare Intl
Sat 3/15
3:09 pm-7:34 am
1 stop17h 25m
San José Juan Santamaria Intl
Thu 3/20
5:51 am-12:27 am
1 stop17h 36m
$436
ChicagoSan José
ORD - SJO
ORDSJO
Chicago O'Hare Intl
Fri 2/28
1:35 pm-9:20 am
1 stop19h 45m
San José Juan Santamaria Intl
Mon 3/3
2:15 am-12:15 pm
1 stop10h 00m
$460
St. LouisSan José
STL - SJO
STLSJO
Lambert-St Louis
Thu 4/10
6:15 am-12:26 pm
1 stop7h 11m
San José Juan Santamaria Intl
Thu 4/17
1:30 pm-9:56 am
1 stop19h 26m
$475
Showing 1-10 of 55 results
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.
Travel insights for flights from Illinois to Costa Rica
Get recent, data-driven insights about flights from Illinois to Costa Rica including ideal travel times, pricing trends, and more.
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 February 20, 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 February 20, 2025.
Get a feel of what it's like to fly with Southwest, Delta and Alaska Airlines 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.
Entertainment
7.6
Boarding
8.2
Food
7.1
Comfort
8.1
Overall
8.1
Crew
8.7
Reviews
1 / 20
2.0
MediocreAnonymous,Feb 2025
MCO - STL
Entertainment
7.6
Boarding
8.2
Food
7.1
Comfort
8.1
Overall
8.1
Crew
8.7
Reviews
1 / 20
2.0
MediocreAnonymous,Feb 2025
MCO - STL
Entertainment
7.6
Boarding
8.2
Food
7.1
Comfort
8.1
Overall
8.1
Crew
8.7
Reviews
1 / 20
2.0
MediocreAnonymous,Feb 2025
MCO - STL
Entertainment
7.6
Boarding
8.2
Food
7.1
Comfort
8.1
Overall
8.1
Crew
8.7
Reviews
1 / 20
2.0
MediocreAnonymous,Feb 2025
MCO - STL
Entertainment
7.6
Boarding
8.2
Food
7.1
Comfort
8.1
Overall
8.1
Crew
8.7
Reviews
1 / 20
2.0
MediocreAnonymous,Feb 2025
MCO - STL
Entertainment
7.6
Boarding
8.2
Food
7.1
Comfort
8.1
Overall
8.1
Crew
8.7
Reviews
1 / 20
2.0
MediocreAnonymous,Feb 2025
MCO - STL
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.
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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.
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 February 20, 2025.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$238 | Average$393 | FlexibilityNo cancel fee | On-time65% | |
| Cheapest$337 | Average$469 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$345 | Average$623 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$422 | Average$736 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$446 | Average$770 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$459 | Average$642 | FlexibilityNo cancel fee | On-time70% | |
| Cheapest$538 | Average$671 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$582 | Average$848 | FlexibilityNo cancel fee | On-time69% |