To save on the cost of your flight from Illinois to Costa Rica, book at least 52 days before your planned departure. Booking around this time can save you about 15% on the cost of this flight compared to booking a flight leaving this week. We have found prices from $478 if you need a flight within two weeks. For flights within the next 72 hours, you can find tickets from as low as $668.
Our data shows that September tends to be the cheapest month to fly to Costa Rica from Illinois. Users have commonly found prices around $628 for the month, but tickets can be as low as $228. Due to multiple factors, prepare for potentially higher prices in December.
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.
Fly from
Fly to
Budget
$240 - $543
Route
Depart
Return
Price
Lambert-St LouisSan José Juan Santamaria Intl
STL - SJO
STLSJO
Lambert-St Louis
Thu 5/16
1 stop14h 51m
San José Juan Santamaria Intl
Wed 5/22
1 stop15h 30m
Lambert-St LouisSan José Juan Santamaria Intl
STL - SJO
STLSJO
Lambert-St Louis
Sun 4/28
1 stop15h 08m
San José Juan Santamaria Intl
Thu 5/2
1 stop7h 12m
Lambert-St LouisSan José Juan Santamaria Intl
STL - SJO
STLSJO
Lambert-St Louis
Tue 5/14
1 stop14h 30m
San José Juan Santamaria Intl
Wed 5/22
1 stop15h 30m
Chicago MidwaySan José Juan Santamaria Intl
MDW - SJO
MDWSJO
Chicago Midway
Mon 5/6
2 stops28h 06m
San José Juan Santamaria Intl
Sat 5/11
1 stop12h 20m
Chicago MidwaySan José Juan Santamaria Intl
MDW - SJO
MDWSJO
Chicago Midway
Fri 5/3
2 stops36h 20m
San José Juan Santamaria Intl
Tue 5/7
1 stop12h 50m
Chicago MidwaySan José Juan Santamaria Intl
MDW - SJO
MDWSJO
Chicago Midway
Wed 8/21
1 stop25h 58m
San José Juan Santamaria Intl
Sun 8/25
1 stop10h 09m
Lambert-St LouisSan José Juan Santamaria Intl
STL - SJO
STLSJO
Lambert-St Louis
Fri 5/10
1 stop7h 32m
San José Juan Santamaria Intl
Wed 5/15
1 stop8h 07m
Moline Quad-CitySan José Juan Santamaria Intl
MLI - SJO
MLISJO
Moline Quad-City
Sat 5/11
1 stop19h 37m
San José Juan Santamaria Intl
Wed 5/15
1 stop14h 16m
Lambert-St LouisSan José Juan Santamaria Intl
STL - SJO
STLSJO
Lambert-St Louis
Sat 6/22
1 stop17h 24m
San José Juan Santamaria Intl
Tue 7/2
1 stop15h 44m
No data available for this route at this time. Please check back soon.
Boarding
Overall
Crew
Entertainment
Food
Comfort
Reviews
Paid a lot for our exit row seats and they weren’t that roomy.
Boarding
Overall
Crew
Entertainment
Food
Comfort
Reviews
Paid a lot for our exit row seats and they weren’t that roomy.
Boarding
Overall
Crew
Entertainment
Food
Comfort
Reviews
Paid a lot for our exit row seats and they weren’t that roomy.
Boarding
Overall
Crew
Entertainment
Food
Comfort
Reviews
Paid a lot for our exit row seats and they weren’t that roomy.
Boarding
Overall
Crew
Entertainment
Food
Comfort
Reviews
Paid a lot for our exit row seats and they weren’t that roomy.
Boarding
Overall
Crew
Entertainment
Food
Comfort
Reviews
Paid a lot for our exit row seats and they weren’t that roomy.
Cheapflights helps you search for flights from Illinois to Costa Rica via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.
By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Costa Rica from Illinois.
Certainly. Search results for flights to Costa Rica from Illinois shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.
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