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Cheap flights from Illinois to Costa Rica from $82

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Illinois to Costa Rica departing on 9/17. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Cheap round-trip flights

Spirit Airlines Logo
9:24 pm - 12:30 pmORD-SJO
16h 06m2 stops
Spirit Airlines Logo
1:35 pm - 1:03 amSJO-ORD
11h 28m1 stop
$285Spirit Airlines
Find Deal
Sat, Nov 1 - Tue, Nov 4
Delta Logo
9:00 am - 10:15 pmSTL-SJO
13h 15m1 stop
Delta Logo
7:00 am - 3:58 pmSJO-STL
8h 58m1 stop
$286Delta
Find Deal
Tue, Nov 18 - Tue, Nov 25
Spirit Airlines Logo
11:37 am - 11:14 amORD-SJO
24h 37m2 stops
Spirit Airlines Logo
12:19 pm - 10:42 amSJO-ORD
21h 23m2 stops
$286Spirit Airlines
Find Deal
Sat, Sep 13 - Sat, Sep 20
American Airlines Logo
5:28 am - 11:49 amSTL-LIR
7h 21m1 stop
American Airlines Logo
2:02 pm - 9:14 amLIR-STL
18h 12m1 stop
$287American Airlines
Find Deal
Mon, Sep 29 - Fri, Oct 3
American Airlines Logo
6:10 am - 7:42 pmSTL-SJO
14h 32m2 stops
American Airlines Logo
6:00 am - 11:59 pmSJO-STL
16h 59m1 stop
$290American Airlines
Find Deal
Tue, Sep 23 - Thu, Sep 25
Logo
11:57 am - 10:27 amORD-SJO
23h 30m2 stops
Logo
7:30 am - 10:18 amSJO-ORD
25h 48m3 stops
$306
Find Deal
Sat, Sep 13 - Wed, Sep 17
United Airlines Logo
6:15 am - 6:16 pmSTL-SJO
12h 01m1 stop
United Airlines Logo
6:30 am - 4:35 pmSJO-STL
10h 05m1 stop
$320United Airlines
Find Deal
Mon, Jan 12 - Sat, Jan 17
Logo
7:29 pm - 3:13 pmORD-SJO
20h 44m2 stops
Logo
1:19 pm - 11:42 pmSJO-ORD
10h 23m1 stop
$331
Find Deal
Sun, Oct 12 - Wed, Nov 5
United Airlines Logo
6:15 am - 7:37 pmSTL-SJO
14h 22m1 stop
United Airlines Logo
7:55 am - 10:00 pmSJO-STL
13h 05m1 stop
$357United Airlines
Find Deal
Fri, Oct 10 - Tue, Oct 14
Frontier Logo
6:10 am - 12:24 pmMDW-SJO
7h 14m1 stop
Frontier Logo
1:53 pm - 10:08 amSJO-MDW
19h 15m1 stop
$408Frontier
Find Deal
Sat, Aug 23 - Sat, Aug 30

Spirit Airlines flights from Illinois to Costa Rica

Our best Spirit Airlines deals on Illinois to Costa Rica flight tickets
Spirit Airlines
Nov 1
ORD9:24 pmChicago O'Hare Intl
16h 06m
2 stops
SJO12:30 pmSan José Juan Santamaria Intl
Nov 4
SJO1:35 pmSan José Juan Santamaria Intl
11h 28m
1 stop
ORD1:03 amChicago O'Hare Intl
$285
Find similar
Spirit Airlines
Sep 13
ORD11:37 amChicago O'Hare Intl
24h 37m
2 stops
SJO11:14 amSan José Juan Santamaria Intl
Sep 20
SJO12:19 pmSan José Juan Santamaria Intl
21h 23m
2 stops
ORD10:42 amChicago O'Hare Intl
$286
Find similar
Spirit Airlines
Nov 1
ORD9:24 pmChicago O'Hare Intl
16h 06m
2 stops
SJO12:30 pmSan José Juan Santamaria Intl
Nov 4
SJO1:35 pmSan José Juan Santamaria Intl
29h 41m
2 stops
ORD7:16 pmChicago O'Hare Intl
$287
Find similar

Delta flights from Illinois to Costa Rica

Our best Delta deals on Illinois to Costa Rica flight tickets
Delta
Nov 18
STL9:00 amLambert-St Louis
13h 15m
1 stop
SJO10:15 pmSan José Juan Santamaria Intl
Nov 25
SJO7:00 amSan José Juan Santamaria Intl
8h 58m
1 stop
STL3:58 pmLambert-St Louis
$286
Find similar
Delta
Sep 1
STL6:00 amLambert-St Louis
7h 00m
1 stop
LIR12:00 pmLiberia
Oct 1
LIR1:25 pmLiberia
7h 35m
1 stop
STL10:00 pmLambert-St Louis
$295
Find similar
Delta
Nov 27
STL8:30 amLambert-St Louis
13h 45m
1 stop
SJO10:15 pmSan José Juan Santamaria Intl
Dec 5
SJO7:00 amSan José Juan Santamaria Intl
16h 39m
1 stop
STL11:39 pmLambert-St Louis
$306
Find similar

momondo 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, momondo users made 832,500 searches. Data last updated August 18, 2025.
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

Sat 11/1

9:24 pm-12:30 pm

2 stops16h 06m

San José Juan Santamaria Intl

Tue 11/4

1:35 pm-1:03 am

1 stop11h 28m

$285

St. LouisSan José

STL - SJO

STLSJO

Lambert-St Louis

Tue 11/18

9:00 am-10:15 pm

1 stop13h 15m

San José Juan Santamaria Intl

Tue 11/25

7:00 am-3:58 pm

1 stop8h 58m

$286

ChicagoSan José

ORD - SJO

ORDSJO

Chicago O'Hare Intl

Sat 9/13

11:37 am-11:14 am

2 stops24h 37m

San José Juan Santamaria Intl

Sat 9/20

12:19 pm-10:42 am

2 stops21h 23m

$286

St. LouisLiberia

STL - LIR

STLLIR

Lambert-St Louis

Mon 9/29

5:28 am-11:49 am

1 stop7h 21m

Liberia

Fri 10/3

2:02 pm-9:14 am

1 stop18h 12m

$287

St. LouisSan José

STL - SJO

STLSJO

Lambert-St Louis

Tue 9/23

6:10 am-7:42 pm

2 stops14h 32m

San José Juan Santamaria Intl

Thu 9/25

6:00 am-11:59 pm

1 stop16h 59m

$290

ChicagoSan José

ORD - SJO

ORDSJO

Chicago O'Hare Intl

Sat 9/13

11:57 am-10:27 am

2 stops23h 30m

San José Juan Santamaria Intl

Wed 9/17

7:30 am-10:18 am

3 stops25h 48m

$306

St. LouisSan José

STL - SJO

STLSJO

Lambert-St Louis

Mon 1/12

6:15 am-6:16 pm

1 stop12h 01m

San José Juan Santamaria Intl

Sat 1/17

6:30 am-4:35 pm

1 stop10h 05m

$320

ChicagoSan José

ORD - SJO

ORDSJO

Chicago O'Hare Intl

Sun 10/12

7:29 pm-3:13 pm

2 stops20h 44m

San José Juan Santamaria Intl

Wed 11/5

1:19 pm-11:42 pm

1 stop10h 23m

$331

St. LouisSan José

STL - SJO

STLSJO

Lambert-St Louis

Fri 10/10

6:15 am-7:37 pm

1 stop14h 22m

San José Juan Santamaria Intl

Tue 10/14

7:55 am-10:00 pm

1 stop13h 05m

$357

ChicagoSan José

MDW - SJO

MDWSJO

Chicago Midway

Sat 8/23

6:10 am-12:24 pm

1 stop7h 14m

San José Juan Santamaria Intl

Sat 8/30

1:53 pm-10:08 am

1 stop19h 15m

$408

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Costa Rica from

How to get the cheapest flight ticket from Illinois to Costa Rica

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Costa Rica?

The cheapest month to fly to Costa Rica from Illinois is in September. Flight prices, which tend to average around $445, are often lower during this time because this is during the off-season. If you’re not able to fly to Costa Rica in September, then July is your next best option. Flight prices from Illinois to Costa Rica during July average around $455.

What is the cheapest day to depart on your flight to Costa Rica?

According to our data, Tuesday is the cheapest day to fly to Costa Rica from Illinois. The lowest ticket price found for a Tuesday departure recently was $541. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. If your travel schedule is flexible, try to avoid departing on a Saturday because tickets tend to average around $822. These prices are subject to change though, so be sure to set up a Price Alert for flights to Costa Rica.

What is the cheapest time of day to depart on your flight to Costa Rica?

In the evening is the cheapest time of day to fly from Illinois to Costa Rica when you can find flight prices for as low as $436. Flying to Costa Rica in the evening is an ideal time because this is during off-peak travel hours. Flights to Costa Rica are more costly in the morning, with an average ticket price of $767. Departure times in the morning fall within the peak daily travel times, which is why tickets can be more expensive.

What is the cheapest Illinois to Costa Rica flight route?

Fly from Chicago O'Hare Intl to San José Juan Santamaria Intl for the best Illinois - Costa Rica flight prices

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

You are more likely to see cheaper flights to Costa Rica from Illinois when booking weeks ahead of your departure date. In general, you can expect to find flights to Costa Rica for around $601 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Costa Rica from Illinois for as low as $457 on momondo.

What cabin class options are available on Illinois to Costa Rica flights?

There are 3 cabin classes available to choose from on Illinois to Costa Rica flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Illinois to Costa Rica flights?

You could potentially save up to 40% on your flight if you consider stops on a Illinois to Costa Rica flight.

Cheap Illinois to Costa Rica flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Illinois to Costa Rica

Best Price Found

$82

Fastest flight time

5h 07m

Direct flights

Every day

Airports in Costa Rica

2 airports
The best one-way flight to Costa Rica from Illinois in the past 72 hours is $82. The best round-trip flight deal from Illinois to Costa Rica found on momondo in the last 72 hours is $285.
The fastest flight from Illinois to Costa Rica takes 5h 07m
Direct flights go from Illinois to Costa Rica every day.
There are 2 airports near Costa Rica: Liberia (LIR), San José Juan Santamaria Intl (SJO)
Search flight deals

  • When did momondo last update prices for flights from Illinois to Costa Rica?

    Prices for flights from Illinois to Costa Rica are refreshed on a daily basis.

  • How many operators does momondo search for flights from Illinois to Costa Rica?

  • How old do you have to be to fly from Illinois to Costa Rica?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Illinois to Costa Rica.

  • What documentation or ID do you need to fly to Costa Rica?

    The travel and health documents you'll need for your trip to Costa Rica may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Costa Rica. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular plane model from Illinois to Costa Rica?

Best airlines flying from Illinois to Costa Rica

Compare and see reviews for airlines that fly from Illinois to Costa Rica with momondo
Airline
Rating
Free Cancellation
Price
Spirit AirlinesPriceFrom $275Free CancellationRating
6.3
8,038 reviews
Search Spirit Airlines flights
AviancaPriceFrom $319Free CancellationRating
6.7
2,407 reviews
Search Avianca flights
Copa AirlinesPriceFrom $343Free CancellationRating
7.5
1,510 reviews
Search Copa Airlines flights
SouthwestPriceFrom $431Free CancellationRating
8.0
4,246 reviews
Search Southwest flights
JetBluePriceFrom $432Free CancellationRating
7.2
2,915 reviews
Search JetBlue flights
DeltaPriceFrom $438Free CancellationRating
8.0
7,981 reviews
Search Delta flights
American AirlinesPriceFrom $444Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
United AirlinesPriceFrom $470Free CancellationRating
7.4
8,925 reviews
Search United Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from Illinois to Costa Rica?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Costa Rica from Illinois.

Can I find flights from Illinois to Costa Rica with flexible booking policies on momondo?

Yes. All flights to Costa Rica from Illinois on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from Illinois to Costa Rica?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Costa Rica from Illinois.

I’m not ready to book a flight from Illinois to Costa Rica right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to Costa Rica from Illinois. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

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