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Cheap flights from Costa Rica to Illinois from $165

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Costa Rica to Illinois departing on 4/22. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Costa Rica to Illinois

Recent round-trip flight deals from Costa Rica to Illinois

Enter your travel dates to find the best prices.
Multiple Airlines Logo
12:19 pm - 11:22 am
SJO
-
ORD
22h 03m
1 stop
Multiple Airlines Logo
1:27 pm - 11:15 am
ORD
-
SJO
22h 48m
1 stop
$282Multiple Airlines
Tue, Apr 14 - Mon, Apr 20
Multiple Airlines Logo
12:20 pm - 10:54 pm
SJO
-
ORD
9h 34m
1 stop
Multiple Airlines Logo
1:27 pm - 11:15 am
ORD
-
SJO
22h 48m
1 stop
$286Multiple Airlines
Fri, Apr 17 - Tue, Apr 21
Spirit Airlines Logo
12:20 pm - 12:14 am
SJO
-
ORD
10h 54m
1 stop
Spirit Airlines Logo
5:34 pm - 11:15 am
ORD
-
SJO
18h 41m
1 stop
$299Spirit Airlines
Fri, Apr 24 - Mon, Apr 27
Spirit Airlines Logo
12:20 pm - 12:14 am
SJO
-
ORD
10h 54m
1 stop
Spirit Airlines Logo
5:05 am - 11:15 am
ORD
-
SJO
7h 10m
1 stop
$302Spirit Airlines
Wed, Apr 29 - Sun, May 10
United Airlines Logo
11:13 am - 10:28 pm
SJO
-
STL
10h 15m
1 stop
United Airlines Logo
6:00 am - 10:11 am
STL
-
SJO
29h 11m
1 stop
$328United Airlines
Thu, Apr 23 - Mon, Apr 27
Southwest Logo
1:10 pm - 10:20 pm
SJO
-
STL
8h 10m
1 stop
Southwest Logo
8:35 am - 7:00 pm
STL
-
SJO
11h 25m
1 stop
$337Southwest
Wed, Apr 15 - Tue, Apr 21
American Airlines Logo
2:22 pm - 10:16 am
SJO
-
STL
18h 54m
1 stop
American Airlines Logo
11:06 am - 7:07 pm
STL
-
SJO
9h 01m
1 stop
$345American Airlines
Wed, May 6 - Sun, May 10
American Airlines Logo
6:30 am - 11:46 pm
SJO
-
STL
16h 16m
2 stops
American Airlines Logo
5:51 am - 7:07 pm
STL
-
SJO
14h 16m
2 stops
$371American Airlines
Tue, May 5 - Fri, May 15
United Airlines Logo
7:55 am - 8:39 am
SJO
-
STL
23h 44m
2 stops
United Airlines Logo
8:15 pm - 12:21 pm
STL
-
SJO
17h 06m
2 stops
$392United Airlines
Wed, May 6 - Sun, May 10
Southwest Logo
9:00 am - 5:30 pm
SJO
-
MDW
7h 30m
1 stop
Southwest Logo
5:35 am - 12:10 pm
MDW
-
SJO
7h 35m
1 stop
$411Southwest
Wed, May 13 - Mon, May 18

JetBlue flights from Costa Rica to Illinois

Our best JetBlue deals on Costa Rica to Illinois flight tickets
JetBlue
Apr 15
LIR2:55 pmLiberia
17h 05m
1 stop
ORD9:00 amChicago O'Hare Intl
Apr 20
ORD8:31 amChicago O'Hare Intl
28h 24m
2 stops
LIR11:55 amLiberia
$539
JetBlue
Mar 4
SJO7:00 amSan José Juan Santamaria Intl
15h 31m
1 stop
MDW10:31 pmChicago Midway
Mar 8
MDW6:00 amChicago Midway
6h 55m
1 stop
SJO11:55 amSan José Juan Santamaria Intl
$723

Spirit Airlines flights from Costa Rica to Illinois

Our best Spirit Airlines deals on Costa Rica to Illinois flight tickets
Spirit Airlines
Apr 24
SJO12:20 pmSan José Juan Santamaria Intl
10h 54m
1 stop
ORD12:14 amChicago O'Hare Intl
Apr 27
ORD5:34 pmChicago O'Hare Intl
18h 41m
1 stop
SJO11:15 amSan José Juan Santamaria Intl
$299
Spirit Airlines
Apr 29
SJO12:20 pmSan José Juan Santamaria Intl
10h 54m
1 stop
ORD12:14 amChicago O'Hare Intl
May 10
ORD5:05 amChicago O'Hare Intl
7h 10m
1 stop
SJO11:15 amSan José Juan Santamaria Intl
$302
Spirit Airlines
May 6
SJO12:20 pmSan José Juan Santamaria Intl
10h 54m
1 stop
ORD12:14 amChicago O'Hare Intl
May 13
ORD5:05 amChicago O'Hare Intl
7h 10m
1 stop
SJO11:15 amSan José Juan Santamaria Intl
$309

momondo 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, momondo users made 832,500 searches. Data last updated February 27, 2026.
Use the filters below to find and compare flights from Costa Rica to Illinois that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

San JoséChicago

SJO - ORD

SJOORD

San José Juan Santamaria Intl

Tue 4/14

12:19 pm-11:22 am

1 stop22h 03m

Chicago O'Hare Intl

Mon 4/20

1:27 pm-11:15 am

1 stop22h 48m

$282

San JoséChicago

SJO - ORD

SJOORD

San José Juan Santamaria Intl

Fri 4/17

12:20 pm-10:54 pm

1 stop9h 34m

Chicago O'Hare Intl

Tue 4/21

1:27 pm-11:15 am

1 stop22h 48m

$286

San JoséChicago

SJO - ORD

SJOORD

San José Juan Santamaria Intl

Fri 4/24

12:20 pm-12:14 am

1 stop10h 54m

Chicago O'Hare Intl

Mon 4/27

5:34 pm-11:15 am

1 stop18h 41m

$299

San JoséChicago

SJO - ORD

SJOORD

San José Juan Santamaria Intl

Wed 4/29

12:20 pm-12:14 am

1 stop10h 54m

Chicago O'Hare Intl

Sun 5/10

5:05 am-11:15 am

1 stop7h 10m

$302

San JoséSt. Louis

SJO - STL

SJOSTL

San José Juan Santamaria Intl

Thu 4/23

11:13 am-10:28 pm

1 stop10h 15m

Lambert-St Louis

Mon 4/27

6:00 am-10:11 am

1 stop29h 11m

$328

San JoséSt. Louis

SJO - STL

SJOSTL

San José Juan Santamaria Intl

Wed 4/15

1:10 pm-10:20 pm

1 stop8h 10m

Lambert-St Louis

Tue 4/21

8:35 am-7:00 pm

1 stop11h 25m

$337

San JoséSt. Louis

SJO - STL

SJOSTL

San José Juan Santamaria Intl

Wed 5/6

2:22 pm-10:16 am

1 stop18h 54m

Lambert-St Louis

Sun 5/10

11:06 am-7:07 pm

1 stop9h 01m

$345

San JoséSt. Louis

SJO - STL

SJOSTL

San José Juan Santamaria Intl

Tue 5/5

6:30 am-11:46 pm

2 stops16h 16m

Lambert-St Louis

Fri 5/15

5:51 am-7:07 pm

2 stops14h 16m

$371

San JoséSt. Louis

SJO - STL

SJOSTL

San José Juan Santamaria Intl

Wed 5/6

7:55 am-8:39 am

2 stops23h 44m

Lambert-St Louis

Sun 5/10

8:15 pm-12:21 pm

2 stops17h 06m

$392

San JoséChicago

SJO - MDW

SJOMDW

San José Juan Santamaria Intl

Wed 5/13

9:00 am-5:30 pm

1 stop7h 30m

Chicago Midway

Mon 5/18

5:35 am-12:10 pm

1 stop7h 35m

$411

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 Illinois from

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

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 Illinois?

The cheapest month to fly to Illinois from Costa Rica is in January. Flight prices, which tend to average around $369, are often lower during this time because this is during the off-season. If you aren’t able to travel to Illinois during the month of January, then flying in October is also cheap. Prices for this month can be found on momondo for an average of $412.

What is the cheapest day to depart on your flight to Illinois?

The cheapest day to depart from Costa Rica to Illinois is on a Thursday when prices can be found for as low as $428. Flights from Costa Rica to Illinois on a Sunday will generally be more expensive and average around $584. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

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

Our most recent data shows that the best time of day to fly to Illinois is in the morning. Flights from Costa Rica to Illinois during this time can be as low as $463. Flights at noon are often more expensive with an average ticket price of $466.

What is the cheapest Costa Rica to Illinois flight route?

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

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

You are more likely to see cheaper flights to Illinois from Costa Rica when booking weeks ahead of your departure date. In general, you can expect to find flights to Illinois for around $444 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Illinois from Costa Rica for as low as $374 on momondo.

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

There are 3 cabin classes available to choose from on Costa Rica to Illinois 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 Costa Rica to Illinois flights?

No. A direct flight is the cheapest option for a flight between Costa Rica to Illinois.

Cheap Costa Rica to Illinois flight deals and tips

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

Best Price Found

$203

Fastest flight time

5h 19m

Direct flights

Every day

Airports in Illinois

98 airports
The best one-way flight to Illinois from Costa Rica in the past 72 hours is $203. The best round-trip flight deal from Costa Rica to Illinois found on momondo in the last 72 hours is $368.
The fastest flight from Costa Rica to Illinois takes 5h 19m
Direct flights go from Costa Rica to Illinois every day.
There are 98 airports in Illinois. From Costa Rica there are direct flights to Chicago O'Hare Intl (ORD).
Search flight deals

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

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

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

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

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Costa Rica to Illinois.

  • What documentation or ID do you need to fly to Illinois?

    The travel and health documents you'll need for your trip to Illinois 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 Illinois. 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 Costa Rica to Illinois?

Best airlines flying from Costa Rica to Illinois

Compare and see reviews for airlines that fly from Costa Rica to Illinois with momondo
Airline
Rating
Free Cancellation
Price
Spirit AirlinesPriceFrom $179Free CancellationRating
6.3
8,493 reviews
Search Spirit Airlines flights
Copa AirlinesPriceFrom $189Free CancellationRating
7.5
1,557 reviews
Search Copa Airlines flights
AviancaPriceFrom $249Free CancellationRating
6.5
2,495 reviews
Search Avianca flights
American AirlinesPriceFrom $332Free CancellationRating
7.1
11,367 reviews
Search American Airlines flights
United AirlinesPriceFrom $400Free CancellationRating
7.4
9,362 reviews
Search United Airlines flights
SouthwestPriceFrom $463Free CancellationRating
8.0
4,303 reviews
Search Southwest flights

Why use momondo?

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

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Costa Rica to Illinois. momondo saves you time and could save you money on your trip.

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

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

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

Once all potential Costa Rica to Illinois flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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

If you are not ready to book a flight from Costa Rica to Illinois now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Illinois and let you know when they change.

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