$121 Find Cheap Flights from Illinois to Costa Rica

1 adult
1 adult, Economy

KAYAK searches hundreds of travel sites at once for deals on flights to Costa Rica

Travelers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

Save 22% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Bundle and saveSave money when you bundle your flight + hotel.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Useful Info

Good to know

Low seasonSeptember
High seasonDecember
Cheapest flight$121
Best time to beat the crowds with an average 18% drop in price.
Most popular time to fly with an average 49% increase in price.
Flight from Chicago Midway Airport to San José

FAQs for booking flights from Illinois to Costa Rica

  • How does KAYAK find such low prices on flights from Illinois to Costa Rica?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Illinois to Costa Rica.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Illinois to Costa Rica?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Illinois to Costa Rica is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Illinois to Costa Rica?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly from Illinois to Costa Rica with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Illinois to Costa Rica?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying from Illinois to Costa Rica up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

  • Which is the cheapest airport to fly into in Costa Rica?

    Prices will differ depending on the departure airport, but generally, the cheapest airport to fly to in Costa Rica is San José Juan Santamaria Intl Airport (SJO), with an average flight price of $267.

  • What is the cheapest day to fly to Costa Rica?

    Based on KAYAK data, the cheapest day to fly to Costa Rica is Tuesday where round-trip tickets can be as cheap as $581. On the other hand, the most expensive day to fly is Saturday, where round-trip prices are $820 on average.

  • What is the cheapest time of day to fly to Costa Rica?

    The cheapest time of day to fly to Costa Rica is generally at night, when round-trip flights cost $436 on average. Morning departures are around 35% more expensive than evening flights, on average. The most expensive time of day to fly to Costa Rica is generally in the morning, which is peak travel time and where the average cost of a ticket is $769.

  • What is the cheapest flight to Costa Rica?

    The cheapest ticket to Costa Rica from Illinois found in the last 72 hours was to Liberia, at $430 round-trip. The most popular route is Chicago O'Hare Intl Airport (ORD) to San José (SJO) and the cheapest round-trip airline ticket found on this route in the last 72 hours was $441.

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

    The cheapest month for flights from Illinois to Costa Rica is May, when tickets cost $672 (return) on average. On the other hand, the most expensive months are December and March, when the average cost of round-trip tickets is $1,146 and $916 respectively.

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

    To get a below average price on the flight from Illinois to Costa Rica, you should book around 2 weeks before departure. For the absolute cheapest price, our data suggests you should book 9 weeks before departure.

  • How long is the flight to Costa Rica?

    An average nonstop flight from Illinois to Costa Rica takes 7h 45m, covering a distance of 2126 miles. The shortest route is Chicago O'Hare Intl Airport (ORD) to Liberia (LIR) with an average flight time of 5h 01m.

  • What are the most popular destinations in Costa Rica?

    Based on KAYAK flight searches, the most popular destination is San José (58% of total searches to Costa Rica). The next most popular destination is Liberia (42%).

Book cheap flights from Illinois to Costa Rica

Recent round-trip flight deals

9/9Tue
1 stopDelta
7h 00mSTL-LIR
9/16Tue
1 stopDelta
7h 35mLIR-STL
$295
11/1Sat
2 stops
16h 25mORD-SJO
11/7Fri
1 stop
12h 40mSJO-ORD
$303
10/18Sat
2 stopsSpirit Airlines
15h 25mORD-SJO
10/21Tue
2 stopsSpirit Airlines
21h 27mSJO-ORD
$306
8/19Tue
1 stopSpirit Airlines
16h 00mORD-SJO
8/26Tue
1 stopSpirit Airlines
9h 55mSJO-ORD
$313
12/3Wed
1 stopCopa Airlines
17h 26mORD-SJO
12/13Sat
1 stopCopa Airlines
15h 55mSJO-ORD
$337
10/23Thu
3 stopsCopa Airlines
26h 45mORD-SJO
10/31Fri
1 stopCopa Airlines
13h 48mSJO-ORD
$342
9/9Tue
2 stopsAmerican Airlines
12h 30mSTL-SJO
9/16Tue
1 stopAmerican Airlines
11h 48mSJO-STL
$344
11/18Tue
1 stopAmerican Airlines
6h 56mSTL-SJO
11/25Tue
1 stopAmerican Airlines
14h 41mSJO-STL
$345
7/19Sat
1 stopUnited Airlines
7h 53mSTL-LIR
7/22Tue
1 stopUnited Airlines
11h 10mLIR-STL
$345
7/19Sat
2 stopsUnited Airlines
17h 30mSTL-LIR
7/22Tue
1 stopUnited Airlines
11h 10mLIR-STL
$368

Search by stops

Search by airline

Search by price

Recent one-way flight deals

8/2Sat
1 stopFrontier
7h 11mMDW-SJO
$121
10/18Sat
2 stopsSpirit Airlines
15h 25mORD-SJO
$128
8/16Sat
1 stop
9h 17mORD-SJO
$146
8/20Wed
1 stop
9h 17mORD-SJO
$151
8/17Sun
1 stopAmerican Airlines
7h 29mSTL-SJO
$154
10/25Sat
1 stopAmerican Airlines
26h 07mSTL-SJO
$166
10/24Fri
1 stopDelta
6h 48mSTL-SJO
$174
12/30Tue
2 stopsUnited Airlines
28h 37mSTL-SJO
$205
12/30Tue
1 stopDelta
6h 45mSTL-SJO
$212
12/28Sun
1 stopUnited Airlines
15h 24mORD-LIR
$352

Search by stops

Search by airline

Search by price

Last minute flights from Illinois to Costa Rica

Last minute flight, train and bus deals

7/10Thu
multi-stopAvianca
15h 25mORD-SJO
7/17Thu
multi-stopAvianca
17h 25mSJO-ORD
$227
7/10Thu
multi-stopAvianca
15h 25mORD-SJO
7/15Tue
multi-stopAvianca
34h 20mSJO-ORD
$275
7/9Wed
multi-stopCopa Airlines
18h 13mORD-SJO
7/11Fri
multi-stopCopa Airlines
15h 11mSJO-ORD
$405
7/10Thu
multi-stopCopa Airlines
26h 45mORD-SJO
7/14Mon
multi-stopCopa Airlines
15h 11mSJO-ORD
$410
7/8Tue
multi-stop
9h 02mORD-SJO
7/22Tue
multi-stop
10h 47mSJO-ORD
$437
7/12Sat
multi-stopFrontier
8h 30mORD-SJO
7/19Sat
multi-stopFrontier
8h 42mSJO-ORD
$443
7/11Fri
multi-stopFrontier
19h 15mORD-SJO
7/19Sat
multi-stopFrontier
19h 38mSJO-ORD
$448
7/8Tue
multi-stopAmerican Airlines
17h 35mSTL-SJO
7/10Thu
multi-stopAmerican Airlines
8h 19mSJO-STL
$456
7/8Tue
multi-stopAmerican Airlines
15h 01mSTL-SJO
7/10Thu
multi-stopAmerican Airlines
13h 01mSJO-STL
$460
7/8Tue
multi-stop
9h 02mORD-SJO
7/22Tue
multi-stop
18h 40mSJO-ORD
$467

Search by stops

Search by airline

Search by price

Everything you need to know for your flight to Costa Rica

Cabin class types available on flights to Illinois

Cabin classes available on flights to Illinois. Prices are the lowest found on KAYAK over the last 7 days. Price and availability is not guaranteed.
First Class flights to Costa Ricafrom $905
Business Class flights to Costa Ricafrom $1,174
Prem Econ Class flights to Costa Ricafrom $1,344
Economy Class flights to Costa Ricafrom $430

Not what you’re looking for? Find thousands of other hotels, flights, car rentals and package deals with KAYAK.