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Cheap flights from Costa Rica to Illinois from $154

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 5/14. 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

Discover deals from 900+ travel sites with momondo.

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.
Spirit Airlines Logo
1:00 pm - 9:54 am
SJO
-
ORD
19h 54m
2 stops
Spirit Airlines Logo
7:33 pm - 11:45 am
ORD
-
SJO
17h 12m
1 stop
$331Spirit Airlines
Fri, May 8 - Thu, May 14
Multiple Airlines Logo
1:00 pm - 11:59 pm
SJO
-
ORD
9h 59m
1 stop
Multiple Airlines Logo
7:33 pm - 11:45 am
ORD
-
SJO
17h 12m
1 stop
$340Multiple Airlines
Fri, May 8 - Thu, May 14
Frontier Logo
9:35 am - 12:14 am
SJO
-
STL
13h 39m
1 stop
Frontier Logo
4:10 pm - 8:20 am
STL
-
SJO
17h 10m
1 stop
$349Frontier
Thu, Jul 9 - Thu, Jul 16
Frontier Logo
9:35 am - 7:55 am
SJO
-
ORD
21h 20m
2 stops
Frontier Logo
5:11 pm - 8:19 am
ORD
-
SJO
16h 08m
1 stop
$360Frontier
Mon, Jun 1 - Sat, Jun 6
United Airlines Logo
12:30 am - 5:42 pm
SJO
-
STL
16h 12m
1 stop
United Airlines Logo
1:13 pm - 10:11 am
STL
-
SJO
21h 58m
2 stops
$443United Airlines
Wed, Jul 22 - Tue, Aug 4
American Airlines Logo
2:02 pm - 11:57 pm
SJO
-
STL
8h 55m
1 stop
American Airlines Logo
7:06 am - 10:38 pm
STL
-
SJO
16h 32m
1 stop
$449American Airlines
Wed, Jul 22 - Wed, Jul 29
American Airlines Logo
11:41 pm - 4:33 pm
SJO
-
STL
15h 52m
1 stop
American Airlines Logo
7:31 am - 6:33 pm
STL
-
SJO
12h 02m
2 stops
$453American Airlines
Wed, Jul 22 - Wed, Jul 29
United Airlines Logo
1:25 pm - 12:20 pm
SJO
-
STL
21h 55m
2 stops
United Airlines Logo
10:23 am - 12:21 pm
STL
-
SJO
26h 58m
2 stops
$459United Airlines
Wed, Sep 23 - Wed, Sep 30
Southwest Logo
9:00 am - 9:30 pm
SJO
-
MDW
11h 30m
1 stop
Southwest Logo
6:15 am - 12:45 pm
MDW
-
SJO
7h 30m
1 stop
$468Southwest
Fri, Sep 25 - Tue, Sep 29
Southwest Logo
9:00 am - 9:00 pm
SJO
-
MDW
11h 00m
2 stops
Southwest Logo
7:40 am - 6:40 pm
MDW
-
SJO
12h 00m
2 stops
$473Southwest
Fri, Sep 25 - Tue, Sep 29

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Spirit Airlines flights from Costa Rica to Illinois

Our best Spirit Airlines deals on Costa Rica to Illinois flight tickets
Spirit Airlines
May 8
SJO1:00 pmSan José Juan Santamaria Intl
19h 54m
2 stops
ORD9:54 amChicago O'Hare Intl
May 14
ORD7:33 pmChicago O'Hare Intl
17h 12m
1 stop
SJO11:45 amSan José Juan Santamaria Intl
$331
Spirit Airlines
Apr 24
SJO12:38 pmSan José Juan Santamaria Intl
9h 29m
2 stops
ORD11:07 pmChicago O'Hare Intl
Apr 29
ORD7:15 pmChicago O'Hare Intl
17h 18m
1 stop
SJO11:33 amSan José Juan Santamaria Intl
$352
Spirit Airlines
May 11
SJO1:00 pmSan José Juan Santamaria Intl
9h 15m
1 stop
ORD11:15 pmChicago O'Hare Intl
May 15
ORD5:05 amChicago O'Hare Intl
7h 40m
1 stop
SJO11:45 amSan José Juan Santamaria Intl
$361

Frontier flights from Costa Rica to Illinois

Our best Frontier deals on Costa Rica to Illinois flight tickets
Frontier
Jul 9
SJO9:35 amSan José Juan Santamaria Intl
13h 39m
1 stop
STL12:14 amLambert-St Louis
Jul 16
STL4:10 pmLambert-St Louis
17h 10m
1 stop
SJO8:20 amSan José Juan Santamaria Intl
$349
Frontier
Jun 1
SJO9:35 amSan José Juan Santamaria Intl
21h 20m
2 stops
ORD7:55 amChicago O'Hare Intl
Jun 6
ORD5:11 pmChicago O'Hare Intl
16h 08m
1 stop
SJO8:19 amSan José Juan Santamaria Intl
$360
Frontier
Jun 28
SJO9:35 amSan José Juan Santamaria Intl
22h 46m
1 stop
ORD9:21 amChicago O'Hare Intl
Jul 8
ORD5:30 pmChicago O'Hare Intl
15h 50m
1 stop
SJO8:20 amSan José Juan Santamaria Intl
$370

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 April 17, 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

Cheapest round-trip

San JoséChicago

SJO - ORD

SJOORD

San José Juan Santamaria Intl

Fri 5/8

1:00 pm-9:54 am

2 stops19h 54m

Chicago O'Hare Intl

Thu 5/14

7:33 pm-11:45 am

1 stop17h 12m

$331

San JoséChicago

SJO - ORD

SJOORD

San José Juan Santamaria Intl

Fri 5/8

1:00 pm-11:59 pm

1 stop9h 59m

Chicago O'Hare Intl

Thu 5/14

7:33 pm-11:45 am

1 stop17h 12m

$340

San JoséSt. Louis

SJO - STL

SJOSTL

San José Juan Santamaria Intl

Thu 7/9

9:35 am-12:14 am

1 stop13h 39m

Lambert-St Louis

Thu 7/16

4:10 pm-8:20 am

1 stop17h 10m

$349

San JoséChicago

SJO - ORD

SJOORD

San José Juan Santamaria Intl

Mon 6/1

9:35 am-7:55 am

2 stops21h 20m

Chicago O'Hare Intl

Sat 6/6

5:11 pm-8:19 am

1 stop16h 08m

$360

San JoséSt. Louis

SJO - STL

SJOSTL

San José Juan Santamaria Intl

Wed 7/22

12:30 am-5:42 pm

1 stop16h 12m

Lambert-St Louis

Tue 8/4

1:13 pm-10:11 am

2 stops21h 58m

$443

San JoséSt. Louis

SJO - STL

SJOSTL

San José Juan Santamaria Intl

Wed 7/22

2:02 pm-11:57 pm

1 stop8h 55m

Lambert-St Louis

Wed 7/29

7:06 am-10:38 pm

1 stop16h 32m

$449

San JoséSt. Louis

SJO - STL

SJOSTL

San José Juan Santamaria Intl

Wed 7/22

11:41 pm-4:33 pm

1 stop15h 52m

Lambert-St Louis

Wed 7/29

7:31 am-6:33 pm

2 stops12h 02m

$453

San JoséSt. Louis

SJO - STL

SJOSTL

San José Juan Santamaria Intl

Wed 9/23

1:25 pm-12:20 pm

2 stops21h 55m

Lambert-St Louis

Wed 9/30

10:23 am-12:21 pm

2 stops26h 58m

$459
Quickest round-trip

San JoséChicago

SJO - MDW

SJOMDW

San José Juan Santamaria Intl

Fri 9/25

9:00 am-9:30 pm

1 stop11h 30m

Chicago Midway

Tue 9/29

6:15 am-12:45 pm

1 stop7h 30m

$468

San JoséChicago

SJO - MDW

SJOMDW

San José Juan Santamaria Intl

Fri 9/25

9:00 am-9:00 pm

2 stops11h 00m

Chicago Midway

Tue 9/29

7:40 am-6:40 pm

2 stops12h 00m

$473

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
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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 $371, 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 $409.

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 Tuesday when prices can be found for as low as $429. Flights from Costa Rica to Illinois on a Sunday will generally be more expensive and average around $511. 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 at noon. Flights from Costa Rica to Illinois during this time can be as low as $464. Flights in the morning are often more expensive with an average ticket price of $469.

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 $462 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 $392 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.

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

$336

Fastest flight time

5h 27m

Direct flights

Thu, Fri and Sun

Airports in Illinois

98 airports
The best one-way flight to Illinois from Costa Rica in the past 72 hours is $336. The best round-trip flight deal from Costa Rica to Illinois found on momondo in the last 72 hours is $470.
The fastest flight from Costa Rica to Illinois takes 5h 27m
Direct flights go from Costa Rica to Illinois on Thursday, Friday and Sunday. There are no airlines offering direct flights.
There are 98 airports in Illinois. From Costa Rica there are direct flights to Chicago O'Hare Intl (ORD).
Search flight deals

Frequently asked questions about flying from Costa Rica to Illinois

  • 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
8,621 reviews
Search Spirit Airlines flights
Copa AirlinesPriceFrom $189Free CancellationRating
7.5
1,576 reviews
Search Copa Airlines flights
AviancaPriceFrom $249Free CancellationRating
6.5
2,514 reviews
Search Avianca flights
American AirlinesPriceFrom $332Free CancellationRating
7.1
11,603 reviews
Search American Airlines flights
United AirlinesPriceFrom $387Free CancellationRating
7.4
9,605 reviews
Search United Airlines flights
SouthwestPriceFrom $463Free CancellationRating
8.0
4,331 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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