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 $127. Users have also found prices from $174 and $182 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 $604.

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 $604 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.

$403+ Flights from Illinois to Costa Rica

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Cheap flight deals from Illinois to Costa Rica

Most accurate provider	AranGrant 3 stars
Most trusted provider	AranGrant 3 stars
Round-trip from	$331 (FlightHub)
One-way from	$127 (Mytrip)
Popular in	December
Cheapest in	May
Average price	$646
Good round-trip deal	$559 or less
Good one-way deal	$225 or less

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

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

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From Illinois to Costa Rica

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One-way flight from Illinois to Costa Rica

Search Deals

Highest demand for flights based on searches. 10% potential increase in price ($73 potential increase over avg. RT price).

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Cheapest flight prices on average. 2% potential price decrease ($13 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in April 2025

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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.

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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 April 30, 2025.

Tue 5/275:05 amORD - SJO

1 stop7h 28mSpirit Airlines

Sun 6/112:28 pmSJO - ORD

2 stops10h 01mSpirit Airlines

Deal found 4/29

$331

Mon 5/125:05 amORD - SJO

1 stop7h 28mMultiple Airlines

Thu 5/2211:32 amSJO - ORD

1 stop11h 48mMultiple Airlines

Deal found 4/28

$332

Wed 6/43:45 pmORD - SJO

2 stops17h 55mAvianca

Sat 7/268:00 pmSJO - ORD

2 stops17h 25mAvianca

Deal found 4/29

$340

Mon 11/34:07 pmSTL - SJO

1 stop6h 53mAmerican Airlines

Fri 11/73:00 pmSJO - STL

1 stop17h 52mAmerican Airlines

Deal found 4/28

$342

Wed 6/115:35 pmSTL - SJO

1 stop18h 02mMultiple Airlines

Tue 6/1711:32 amSJO - STL

1 stop11h 21mMultiple Airlines

Deal found 4/28

$343

Thu 6/128:25 amSTL - SJO

1 stop15h 14mUnited Airlines

Thu 6/195:30 amSJO - STL

1 stop10h 23mUnited Airlines

Deal found 4/28

$362

Mon 6/29:12 pmMDW - SJO

1 stop14h 15mMultiple Airlines

Mon 6/95:52 amSJO - MDW

2 stops13h 25mMultiple Airlines

Deal found 4/28

$369

Wed 6/115:25 amSTL - LIR

1 stop7h 20mAmerican Airlines

Wed 6/183:40 pmLIR - STL

1 stop16h 38mAmerican Airlines

Deal found 4/28

$385

Thu 7/173:07 pmORD - SJO

1 stop17h 28mCopa Airlines

Sun 7/202:29 pmSJO - ORD

1 stop8h 51mCopa Airlines

Deal found 4/29

$393

Mon 6/26:15 amSTL - LIR

1 stop9h 08mUnited Airlines

Sun 6/81:03 pmLIR - STL

1 stop8h 44mUnited Airlines

Deal found 4/28

$405

Tue 8/1910:10 pmORD - LIR

2 stops14h 34mAmerican Airlines

Tue 8/2612:50 pmLIR - ORD

1 stop10h 07mAmerican Airlines

Deal found 4/29

$416

Thu 6/125:35 pmMLI - LIR

2 stops21h 48mUnited Airlines

Thu 6/191:20 pmLIR - MLI

2 stops26h 28mUnited Airlines

Deal found 4/28

$419

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 30, 2025.

Tue 5/275:05 amORD - SJO

1 stop7h 28mSpirit Airlines

Sun 6/112:28 pmSJO - ORD

2 stops10h 01mSpirit Airlines

Deal found 4/29

$331

Mon 5/125:05 amORD - SJO

1 stop7h 28mMultiple Airlines

Thu 5/2211:32 amSJO - ORD

1 stop11h 48mMultiple Airlines

Deal found 4/28

$332

Wed 6/43:45 pmORD - SJO

2 stops17h 55mAvianca

Sat 7/268:00 pmSJO - ORD

2 stops17h 25mAvianca

Deal found 4/29

$340

Wed 5/75:12 amSTL - SJO

1 stop8h 57mAmerican Airlines

Wed 5/286:03 amSJO - STL

1 stop15h 16mAmerican Airlines

Deal found 4/29

$368

Thu 7/173:07 pmORD - SJO

1 stop17h 28mCopa Airlines

Sun 7/202:29 pmSJO - ORD

1 stop8h 51mCopa Airlines

Deal found 4/29

$393

Mon 6/25:00 amSTL - LIR

2 stops10h 23mUnited Airlines

Sun 6/81:03 pmLIR - STL

1 stop8h 44mUnited Airlines

Deal found 4/28

$405

Tue 8/196:00 amORD - LIR

1 stop7h 00mDelta

Tue 8/261:25 pmLIR - ORD

1 stop9h 30mDelta

Deal found 4/29

$425

Thu 9/259:15 amMDW - SJO

2 stops10h 40mSouthwest

Tue 9/301:40 pmSJO - MDW

1 stop8h 40mSouthwest

Deal found 4/29

$451

Wed 5/287:00 amORD - LIR

2 stops24h 20mAlaska Airlines

Wed 6/411:20 amLIR - ORD

2 stops17h 20mAlaska Airlines

Deal found 4/29

$603

Mon 5/195:45 pmSTL - SJO

1 stop17h 42mMultiple Airlines

Sun 5/2511:32 amSJO - STL

1 stop11h 20mMultiple Airlines

Deal found 4/29

$342

Wed 6/115:25 amSTL - LIR

1 stop7h 20mAmerican Airlines

Wed 6/183:40 pmLIR - STL

1 stop16h 38mAmerican Airlines

Deal found 4/28

$385

Fri 8/153:35 pmORD - LIR

2 stops21h 25mAir Canada

Sat 8/231:00 pmLIR - ORD

1 stop17h 59mAir Canada

Deal found 4/28

$821

Last-minute flights from Illinois to Costa Rica
Discover last-minute flight deals from Illinois to Costa Rica. Data last updated April 30, 2025 and is based on user searches.

Wed 4/307:51 amORD - SJO

1 stop15h 02mCopa Airlines

Wed 5/72:29 pmSJO - ORD

1 stop9h 05mCopa Airlines

Deal found 4/29

$430

Sat 5/35:00 amORD - SJO

1 stop9h 19mAmerican Airlines

Mon 5/51:50 pmSJO - ORD

1 stop9h 06mAmerican Airlines

Deal found 4/29

$443

Mon 5/51:45 amORD - SJO

1 stop22h 29mMultiple Airlines

Tue 5/1312:28 pmSJO - ORD

1 stop9h 36mMultiple Airlines

Deal found 4/28

$358

Mon 5/59:50 pmORD - SJO

1 stop15h 36mUnited Airlines

Sat 5/106:35 amSJO - ORD

1 stop15h 32mUnited Airlines

Deal found 4/28

$533

Mon 5/55:15 amORD - LIR

1 stop10h 08mUnited Airlines

Mon 5/123:25 pmLIR - ORD

1 stop17h 46mUnited Airlines

Deal found 4/29

$790

Tue 5/67:47 pmORD - SJO

1 stop16h 46mSpirit Airlines

Tue 5/1312:28 pmSJO - ORD

1 stop9h 36mSpirit Airlines

Deal found 4/28

$368

Tue 5/67:54 amORD - SJO

1 stop9h 28mCopa Airlines

Wed 5/215:52 amSJO - ORD

1 stop17h 42mCopa Airlines

Deal found 4/29

$430

Tue 5/68:05 amORD - SJO

2 stops11h 30mAmerican Airlines

Wed 5/212:15 pmSJO - ORD

1 stop8h 41mAmerican Airlines

Deal found 4/29

$448

Tue 5/62:35 pmORD - SJO

1 stop9h 55mAvianca

Tue 5/201:55 amSJO - ORD

1 stop34h 20mAvianca

Deal found 4/29

$465

Wed 5/75:12 amSTL - SJO

1 stop8h 57mAmerican Airlines

Wed 5/286:03 amSJO - STL

1 stop15h 16mAmerican Airlines

Deal found 4/29

$368

Wed 5/78:45 amMDW - SJO

1 stop11h 55mSouthwest

Wed 5/148:45 amSJO - MDW

1 stop10h 30mSouthwest

Deal found 4/27

$482

Wed 5/76:30 amMDW - LIR

1 stop7h 40mSouthwest

Wed 5/142:05 pmLIR - MDW

1 stop7h 45mSouthwest

Deal found 4/27

$692

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 30, 2025.

Tue 6/1710:46 amORD - SJO

1 stop24h 51mSpirit Airlines

Deal found 4/29

$127

Tue 5/209:55 amORD - SJO

1 stop13h 45mMultiple Airlines

Deal found 4/29

$146

Sat 7/269:12 pmMDW - SJO

1 stop16h 28mMultiple Airlines

Deal found 4/29

$169

Fri 7/253:45 pmORD - SJO

1 stop18h 35mAvianca

Deal found 4/29

$174

Mon 6/238:05 pmSTL - LIR

2 stops18h 10mAmerican Airlines

Deal found 4/28

$182

Sat 5/246:45 pmMLI - SJO

2 stops17h 48mMultiple Airlines

Deal found 4/28

$189

Mon 5/198:05 amMDW - SJO

2 stops12h 35mSouthwest

Deal found 4/29

$205

Sun 5/119:45 amORD - SJO

2 stops9h 50mAmerican Airlines

Deal found 4/29

$205

Fri 8/16:00 amMDW - SJO

1 stop6h 56mDelta

Deal found 4/29

$207

Wed 5/76:00 amSTL - LIR

1 stop7h 00mDelta

Deal found 4/29

$212

Sun 6/155:35 amORD - LIR

1 stop7h 25mDelta

Deal found 4/29

$217

Mon 6/238:25 amSTL - LIR

1 stop6h 58mUnited Airlines

Deal found 4/28

$222

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

ChicagoSan José

ORD - SJO

ORDSJO

Chicago O'Hare Intl

Tue 5/27

5:05 am-11:33 am

1 stop7h 28m

San José Juan Santamaria Intl

Sun 6/1

12:28 pm-11:29 pm

2 stops10h 01m

$331

ChicagoSan José

ORD - SJO

ORDSJO

Chicago O'Hare Intl

Mon 5/12

5:05 am-11:33 am

1 stop7h 28m

San José Juan Santamaria Intl

Thu 5/22

11:32 am-12:20 am

1 stop11h 48m

$332

ChicagoSan José

ORD - SJO

ORDSJO

Chicago O'Hare Intl

Wed 6/4

3:45 pm-8:40 am

2 stops17h 55m

San José Juan Santamaria Intl

Sat 7/26

8:00 pm-2:25 pm

2 stops17h 25m

$340

St. LouisSan José

STL - SJO

STLSJO

Lambert-St Louis

Mon 5/19

5:45 pm-10:27 am

1 stop17h 42m

San José Juan Santamaria Intl

Sun 5/25

11:32 am-11:52 pm

1 stop11h 20m

$342

St. LouisSan José

STL - SJO

STLSJO

Lambert-St Louis

Fri 10/3

4:49 pm-9:25 am

2 stops17h 36m

San José Juan Santamaria Intl

Fri 10/10

12:55 pm-8:55 am

2 stops19h 00m

$366

ChicagoSan José

MDW - SJO

MDWSJO

Chicago Midway

Mon 6/2

9:12 pm-10:27 am

1 stop14h 15m

San José Juan Santamaria Intl

Mon 6/9

5:52 am-8:17 pm

2 stops13h 25m

$369

St. LouisLiberia

STL - LIR

STLLIR

Lambert-St Louis

Wed 6/11

5:25 am-11:45 am

1 stop7h 20m

Liberia

Wed 6/18

3:40 pm-9:18 am

1 stop16h 38m

$385

ChicagoSan José

ORD - SJO

ORDSJO

Chicago O'Hare Intl

Thu 7/17

3:07 pm-7:35 am

1 stop17h 28m

San José Juan Santamaria Intl

Sun 7/20

2:29 pm-12:20 am

1 stop8h 51m

$393

St. LouisLiberia

STL - LIR

STLLIR

Lambert-St Louis

Mon 6/2

6:15 am-2:23 pm

1 stop9h 08m

Liberia

Sun 6/8

1:03 pm-10:47 pm

1 stop8h 44m

$405

ChicagoLiberia

ORD - LIR

ORDLIR

Chicago O'Hare Intl

Tue 8/19

10:10 pm-11:44 am

2 stops14h 34m

Liberia

Tue 8/26

12:50 pm-11:57 pm

1 stop10h 07m

$416

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/29

Showing 1-10 of 52 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

7,929 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

7,929 reviews

Delta

8.0

Very good

7,929 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

9,961 reviews

Delta

8.0

Very good

7,929 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

4,295 reviews

Delta

8.0

Very good

7,929 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

7.5

Good

1,411 reviews

Delta

8.0

Very good

7,929 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

1,698 reviews

Delta

8.0

Very good

7,929 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 $127. Users have also found prices from $174 and $182 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

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Top 8 airlines flying from Illinois to Costa Rica

Airline	Cheapest	Average	Flexibility	On-time
Spirit Airlines	Cheapest$249	Average$416	FlexibilityNo cancel fee	On-time65%
Avianca	Cheapest$337	Average$488	FlexibilityNo cancel fee	On-time71%
JetBlue	Cheapest$345	Average$635	FlexibilityNo cancel fee	On-time62%
Copa Airlines	Cheapest$416	Average$617	FlexibilityNo cancel fee	On-time70%
American Airlines	Cheapest$422	Average$731	FlexibilityNo cancel fee	On-time71%
Delta	Cheapest$442	Average$795	FlexibilityNo cancel fee	On-timeN/A
Southwest	Cheapest$479	Average$666	FlexibilityNo cancel fee	On-time63%
United Airlines	Cheapest$544	Average$838	FlexibilityNo cancel fee	On-time69%

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$127+ 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 6/17. 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

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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 April 30, 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 30, 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 30, 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 30, 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

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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 30, 2025.