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

For one-way options, check prices for Spirit Airlines. According to our data, you can fly for as low as $133. Users have also found prices from $150 and $177 on Avianca and American Airlines, respectively.

How far in advance should I book a flight from Illinois to Costa Rica?

To save on the cost of your flight from Illinois to Costa Rica, book at least 27 days before your planned departure. Booking around this time can save you about 56% on the cost of this flight compared to booking a flight leaving this week. We have found prices from $392 if you need a flight within two weeks. For flights within the next 72 hours, you can find tickets from as low as $600.

What is the cheapest month to fly from Illinois to Costa Rica?

Our data shows that May tends to be the cheapest month to fly to Costa Rica from Illinois. Users have commonly found prices around $601 for the month, but tickets can be as low as $225. Due to multiple factors, prepare for potentially higher prices in December.

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.

$400+ Flights from Illinois to Costa Rica

Home Search by date Vacation packages Hotels Flight deals Car rental Travel tips & news

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

Most accurate provider	FlightHub 3 stars
Most trusted provider	FlightHub 3 stars
Round-trip from	$252 (Mytrip)
One-way from	$133 (Cheapflightsfares)
Popular in	December
Cheapest in	May
Average price	$634
Good round-trip deal	$635 or less
Good one-way deal	$357 or less

Provider with most accurate pricing for Chicago (CHI)-San José Juan Santamaria Intl flight deals.

Search Deals

Provider most trusted by Cheapflights users for Chicago (CHI)-San José Juan Santamaria Intl flights.

Search Deals

From Illinois to Costa Rica

Search Deals

One-way flight from Illinois to Costa Rica

Search Deals

Highest demand for flights based on searches. 11% potential increase in price ($77 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease ($14 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in April 2025

Search Deals

Price to beat on a round-trip flight from Illinois to Costa Rica.

Search Deals

Price to beat on a one-way flight from Illinois to Costa Rica.

Search Deals

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 April 2, 2025.

Tue 4/296:10 pmSTL - SJO

1 stop6h 40mSpirit Airlines

Wed 5/712:28 pmSJO - STL

1 stop19h 47mSpirit Airlines

Deal found 4/1

$252

Tue 4/295:41 pmSTL - SJO

1 stop17h 43mMultiple Airlines

Wed 5/711:32 amSJO - STL

1 stop11h 34mMultiple Airlines

Deal found 3/31

$291

Sat 5/311:45 amORD - SJO

2 stops24h 33mSpirit Airlines

Sat 5/1011:32 amSJO - ORD

1 stop10h 57mSpirit Airlines

Deal found 4/1

$333

Wed 6/43:45 pmORD - SJO

1 stop8h 30mAvianca

Tue 6/105:05 amSJO - ORD

1 stop10h 00mAvianca

Deal found 4/1

$334

Thu 4/247:33 pmORD - SJO

1 stop16h 45mMultiple Airlines

Sat 4/261:40 amSJO - ORD

1 stop10h 35mMultiple Airlines

Deal found 3/31

$337

Wed 5/77:10 amSTL - SJO

1 stop6h 59mAmerican Airlines

Wed 5/2811:59 pmSJO - STL

1 stop17h 22mAmerican Airlines

Deal found 4/1

$340

Fri 5/98:30 amMDW - SJO

1 stop28h 31mFrontier

Sat 5/171:24 pmSJO - MDW

1 stop23h 10mFrontier

Deal found 4/1

$380

Wed 6/116:00 amSTL - LIR

1 stop7h 00mDelta

Wed 6/181:25 pmLIR - STL

1 stop9h 17mDelta

Deal found 3/31

$385

Wed 6/115:30 amSTL - LIR

2 stops8h 45mAmerican Airlines

Wed 6/183:40 pmLIR - STL

1 stop16h 38mAmerican Airlines

Deal found 3/31

$389

Wed 4/27:51 amORD - SJO

1 stop9h 32mCopa Airlines

Thu 4/310:05 amSJO - ORD

1 stop13h 27mCopa Airlines

Deal found 4/1

$430

Wed 8/136:15 amMDW - SJO

1 stop7h 30mSouthwest

Wed 8/201:40 pmSJO - MDW

1 stop8h 40mSouthwest

Deal found 3/31

$438

Sat 4/1212:58 pmMDW - SJO

1 stop22h 26mMultiple Airlines

Sat 4/195:52 pmSJO - MDW

2 stops24h 43mMultiple Airlines

Deal found 3/31

$443

Best flights from Illinois to Costa Rica
Discover carefully curated flight deals from Illinois to Costa Rica that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 2, 2025.

Tue 4/296:10 pmSTL - SJO

1 stop6h 40mSpirit Airlines

Wed 5/712:28 pmSJO - STL

1 stop19h 47mSpirit Airlines

Deal found 4/1

$252

Tue 4/295:41 pmSTL - SJO

1 stop17h 43mMultiple Airlines

Wed 5/711:32 amSJO - STL

1 stop11h 34mMultiple Airlines

Deal found 3/31

$291

Wed 6/43:45 pmORD - SJO

1 stop8h 30mAvianca

Tue 6/105:05 amSJO - ORD

1 stop10h 00mAvianca

Deal found 4/1

$334

Wed 5/77:10 amSTL - SJO

1 stop6h 59mAmerican Airlines

Wed 5/2811:59 pmSJO - STL

1 stop17h 22mAmerican Airlines

Deal found 4/1

$340

Fri 5/98:30 amMDW - SJO

1 stop28h 31mFrontier

Sat 5/171:24 pmSJO - MDW

1 stop23h 10mFrontier

Deal found 4/1

$380

Wed 6/116:00 amSTL - LIR

1 stop7h 00mDelta

Wed 6/181:25 pmLIR - STL

1 stop9h 17mDelta

Deal found 3/31

$385

Sun 4/133:09 pmORD - SJO

1 stop17h 27mCopa Airlines

Sun 4/2010:57 amSJO - ORD

1 stop12h 35mCopa Airlines

Deal found 4/1

$438

Fri 6/68:25 amSTL - SJO

1 stop15h 14mUnited Airlines

Fri 6/205:30 amSJO - STL

1 stop15h 47mUnited Airlines

Deal found 4/1

$452

Wed 4/1610:25 amMDW - SJO

2 stops10h 15mSouthwest

Wed 4/231:10 pmSJO - MDW

1 stop8h 40mSouthwest

Deal found 4/1

$482

Fri 6/134:00 pmORD - LIR

1 stop21h 00mAir Canada

Sat 6/211:00 pmLIR - ORD

1 stop22h 54mAir Canada

Deal found 4/1

$599

Sat 4/262:07 pmORD - LIR

2 stops17h 13mAlaska Airlines

Sat 5/34:52 pmLIR - ORD

2 stops24h 09mAlaska Airlines

Deal found 4/1

$615

Sat 5/311:45 amORD - SJO

2 stops24h 33mSpirit Airlines

Sat 5/1011:32 amSJO - ORD

1 stop10h 57mSpirit Airlines

Deal found 4/1

$333

Last-minute flights from Illinois to Costa Rica
Discover last-minute flight deals from Illinois to Costa Rica. Data last updated April 2, 2025 and is based on user searches.

Wed 4/22:35 pmORD - SJO

1 stop9h 55mAvianca

Tue 4/84:45 pmSJO - ORD

1 stop19h 30mAvianca

Deal found 4/1

$367

Wed 4/27:51 amORD - SJO

1 stop9h 32mCopa Airlines

Thu 4/310:05 amSJO - ORD

1 stop13h 27mCopa Airlines

Deal found 4/1

$430

Wed 4/29:45 amORD - SJO

2 stops9h 54mAmerican Airlines

Thu 4/311:59 pmSJO - ORD

1 stop16h 35mAmerican Airlines

Deal found 4/1

$457

Mon 4/71:23 pmMDW - SJO

1 stop22h 27mMultiple Airlines

Sun 4/136:07 pmSJO - MDW

2 stops22h 42mMultiple Airlines

Deal found 4/1

$497

Mon 4/75:55 amMDW - SJO

1 stop8h 00mSouthwest

Mon 4/141:10 pmSJO - MDW

1 stop9h 25mSouthwest

Deal found 3/30

$589

Tue 4/89:50 pmORD - LIR

1 stop15h 05mUnited Airlines

Tue 4/151:20 pmLIR - ORD

1 stop9h 55mUnited Airlines

Deal found 4/1

$623

Tue 4/85:10 amORD - LIR

2 stops9h 06mAmerican Airlines

Tue 4/152:05 pmLIR - ORD

1 stop17h 20mAmerican Airlines

Deal found 4/1

$627

Thu 4/105:36 amORD - SJO

1 stop6h 42mSpirit Airlines

Wed 4/1612:23 pmSJO - ORD

1 stop10h 57mSpirit Airlines

Deal found 4/1

$352

Thu 4/102:35 pmORD - SJO

2 stops20h 30mAvianca

Mon 4/143:00 pmSJO - ORD

1 stop21h 15mAvianca

Deal found 4/1

$395

Fri 4/114:57 pmSTL - SJO

1 stop18h 27mMultiple Airlines

Fri 4/2511:35 amSJO - STL

1 stop11h 29mMultiple Airlines

Deal found 4/1

$376

Fri 4/119:54 amORD - SJO

1 stop25h 30mMultiple Airlines

Fri 4/1812:55 amSJO - ORD

2 stops13h 03mMultiple Airlines

Deal found 4/1

$379

Fri 4/116:15 amSTL - SJO

1 stop14h 22mUnited Airlines

Fri 4/251:30 pmSJO - STL

1 stop7h 39mUnited Airlines

Deal found 4/1

$539

One-way flights from Illinois to Costa Rica
Search for one-way flight options from Illinois to Costa Rica. Find affordable one-way fares based on user searches. Data last updated April 2, 2025.

Sun 5/114:35 pmORD - SJO

1 stop18h 52mSpirit Airlines

Deal found 4/1

$133

Wed 6/253:45 pmORD - SJO

2 stops17h 55mAvianca

Deal found 4/1

$150

Tue 5/209:55 amORD - SJO

1 stop13h 45mMultiple Airlines

Deal found 4/1

$157

Mon 6/235:31 amSTL - LIR

1 stop10h 09mAmerican Airlines

Deal found 4/1

$177

Mon 4/1410:28 amORD - SJO

2 stops8h 56mAmerican Airlines

Deal found 4/1

$205

Fri 6/206:16 pmORD - SJO

1 stop19h 21mFrontier

Deal found 4/1

$206

Mon 6/236:00 amMDW - SJO

1 stop7h 00mDelta

Deal found 4/1

$207

Sun 4/278:25 pmORD - LIR

1 stop17h 45mAir Canada

Deal found 4/1

$212

Wed 5/2112:21 pmMDW - SJO

2 stops24h 12mMultiple Airlines

Deal found 4/1

$217

Sat 6/146:00 amMDW - SJO

1 stop7h 37mFrontier

Deal found 3/31

$239

Sun 6/225:15 amMDW - SJO

1 stop7h 20mSouthwest

Deal found 4/1

$245

Thu 4/249:50 pmORD - SJO

1 stop15h 36mUnited Airlines

Deal found 4/1

$250

Cheapflights Fare Finder

Use the filters below to find and compare flights from Illinois to Costa Rica that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

St. LouisSan José

STL - SJO

STLSJO

Lambert-St Louis

Tue 4/29

6:10 pm-11:50 pm

1 stop6h 40m

San José Juan Santamaria Intl

Wed 5/7

12:28 pm-9:15 am

1 stop19h 47m

$252

St. LouisSan José

STL - SJO

STLSJO

Lambert-St Louis

Tue 4/29

5:41 pm-10:24 am

1 stop17h 43m

San José Juan Santamaria Intl

Wed 5/7

11:32 am-12:06 am

1 stop11h 34m

$291

ChicagoSan José

ORD - SJO

ORDSJO

Chicago O'Hare Intl

Sat 5/3

11:45 am-11:18 am

2 stops24h 33m

San José Juan Santamaria Intl

Sat 5/10

11:32 am-11:29 pm

1 stop10h 57m

$333

ChicagoSan José

ORD - SJO

ORDSJO

Chicago O'Hare Intl

Wed 6/4

3:45 pm-11:15 pm

1 stop8h 30m

San José Juan Santamaria Intl

Tue 6/10

5:05 am-4:05 pm

1 stop10h 00m

$334

ChicagoSan José

ORD - SJO

ORDSJO

Chicago O'Hare Intl

Thu 4/24

7:33 pm-11:18 am

1 stop16h 45m

San José Juan Santamaria Intl

Sat 4/26

1:40 am-1:15 pm

1 stop10h 35m

$337

St. LouisSan José

STL - SJO

STLSJO

Lambert-St Louis

Wed 5/7

7:10 am-1:09 pm

1 stop6h 59m

San José Juan Santamaria Intl

Wed 5/28

11:59 pm-6:21 pm

1 stop17h 22m

$340

ChicagoSan José

MDW - SJO

MDWSJO

Chicago Midway

Fri 5/9

8:30 am-12:01 pm

1 stop28h 31m

San José Juan Santamaria Intl

Sat 5/17

1:24 pm-1:34 pm

1 stop23h 10m

$380

St. LouisLiberia

STL - LIR

STLLIR

Lambert-St Louis

Wed 6/11

6:00 am-12:00 pm

1 stop7h 00m

Liberia

Wed 6/18

1:25 pm-11:42 pm

1 stop9h 17m

$385

St. LouisLiberia

STL - LIR

STLLIR

Lambert-St Louis

Wed 6/11

5:30 am-1:15 pm

2 stops8h 45m

Liberia

Wed 6/18

3:40 pm-9:18 am

1 stop16h 38m

$389

ChicagoSan José

ORD - SJO

ORDSJO

Chicago O'Hare Intl

Sun 4/13

3:09 pm-7:36 am

1 stop17h 27m

San José Juan Santamaria Intl

Sun 4/20

10:57 am-12:32 am

1 stop12h 35m

$438

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/1

Showing 1-10 of 54 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.

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?

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

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

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 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

7,897 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Delta

8.0

Very good

7,897 reviews

Delta

8.0

Very good

7,897 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Alaska Airlines

8.0

Very good

9,823 reviews

Delta

8.0

Very good

7,897 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Southwest

8.0

Very good

4,275 reviews

Delta

8.0

Very good

7,897 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Copa Airlines

7.6

Good

1,400 reviews

Delta

8.0

Very good

7,897 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Aeromexico

7.5

Good

1,700 reviews

Delta

8.0

Very good

7,897 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Related info for your journey

What are the cheapest airlines to fly from Illinois to Costa Rica one-way?
For one-way options, check prices for Spirit Airlines. According to our data, you can fly for as low as $133. Users have also found prices from $150 and $177 on Avianca and American Airlines, 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

Browse thousands of different options on Cheapflights for your next trip

Alternative routes for Illinois to Costa Rica

John F Kennedy Intl to San José flights

Newark to San José flights

John F Kennedy Intl to Panama City flights

Los Angeles to San Salvador flights

Los Angeles to Guatemala City flights

Newark to Panama City flights

Los Angeles to San José flights

John F Kennedy Intl to Guatemala City flights

John F Kennedy Intl to San Salvador flights

Dulles Intl to San Salvador flights

Dulles Intl to Panama City flights

Hobby to San Salvador flights

John F Kennedy Intl to Liberia flights

LaGuardia to San José flights

Dallas/Fort Worth to San Salvador flights

Newark to Liberia flights

George Bush Intcntl to San Salvador flights

LaGuardia to Panama City flights

Newark to Guatemala City flights

Dulles Intl to Guatemala City flights

San Francisco to San José flights

Hobby to Guatemala City flights

Los Angeles to Liberia flights

Newark to San Salvador flights

George Bush Intcntl to Guatemala City flights

Miami to Panama City flights

Fort Lauderdale to San José flights

Hobby to San José flights

Atlanta to Panama City flights

O'Hare Intl to Panama City flights

Dallas/Fort Worth to San José flights

Miami to San José flights

Orlando to San José flights

Dulles Intl to San José flights

Los Angeles to Panama City flights

Boston to San José flights

Orlando to Panama City flights

Ontario to San Salvador flights

Atlanta to San José flights

O'Hare Intl to Guatemala City flights

O'Hare Intl to San José flights

George Bush Intcntl to San José flights

Miami to Managua flights

LaGuardia to Guatemala City flights

Reagan-National to San Salvador flights

Reagan-National to San José flights

Baltimore to Panama City flights

Baltimore to San José flights

Los Angeles to Philip S.W.Goldson flights

Atlanta to San Salvador flights

Top 8 airlines flying from Illinois to Costa Rica

Airline	Cheapest	Average	Flexibility	On-time
Spirit Airlines	Cheapest$237	Average$407	FlexibilityNo cancel fee	On-time65%
Avianca	Cheapest$338	Average$482	FlexibilityNo cancel fee	On-time71%
JetBlue	Cheapest$345	Average$635	FlexibilityNo cancel fee	On-time62%
American Airlines	Cheapest$422	Average$739	FlexibilityNo cancel fee	On-time71%
Copa Airlines	Cheapest$428	Average$616	FlexibilityNo cancel fee	On-time70%
Delta	Cheapest$446	Average$784	FlexibilityNo cancel fee	On-timeN/A
Southwest	Cheapest$538	Average$697	FlexibilityNo cancel fee	On-time63%
United Airlines	Cheapest$564	Average$832	FlexibilityNo cancel fee	On-time69%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.

$133+ 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 5/11. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Illinois to Costa Rica with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

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 April 2, 2025.

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Good round-trip deal

Good one-way deal

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 April 2, 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 April 2, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Illinois to Costa Rica that are best for you.

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.

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?

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 April 2, 2025.

Rainfall in Costa Rica by month

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

Temperature in Costa Rica by month

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

Reviews of airlines servicing Costa Rica

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?

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

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

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

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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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

100% Free

Book with Flexibility

Travel Smart

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 April 2, 2025.