$207 Find Cheap Flights from Costa Rica to St. Louis

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight to St. Louis departing on 6/14. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to St. Louis

 
These are the airlines KAYAK users have selected most often from within our search results for flights to St. Louis, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results for flights to St. Louis, as well as popular online travel agencies
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Flight Deals

Cheap Flights from Costa Rica to St. Louis

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Costa Rica to St. Louis that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Costa Rica to St. Louis

Sun, Jun 7 - Fri, Jun 19
Frontier Logo
9:35 am - 11:57 pm
SJO
-
STL
13h 22m
1 stop
Frontier Logo
4:17 pm - 8:20 am
STL
-
SJO
17h 03m
1 stop
$370Frontier
Thu, Jul 23 - Tue, Aug 4
United Airlines Logo
12:30 am - 2:16 pm
SJO
-
STL
12h 46m
1 stop
United Airlines Logo
5:33 pm - 12:21 pm
STL
-
SJO
19h 48m
2 stops
$385United Airlines
Wed, Jul 22 - Sat, Aug 1
American Airlines Logo
3:38 pm - 10:24 am
SJO
-
STL
17h 46m
1 stop
American Airlines Logo
7:23 pm - 2:37 pm
STL
-
SJO
20h 14m
1 stop
$402American Airlines
Tue, Jul 21 - Wed, Jul 29
American Airlines Logo
12:50 pm - 10:24 am
SJO
-
STL
20h 34m
1 stop
American Airlines Logo
7:06 am - 2:37 pm
STL
-
SJO
8h 31m
1 stop
$404American Airlines
Wed, Jul 22 - Sat, Aug 1
American Airlines Logo
7:00 am - 9:21 pm
SJO
-
STL
13h 21m
2 stops
American Airlines Logo
7:23 pm - 2:37 pm
STL
-
SJO
20h 14m
1 stop
$406American Airlines
Tue, Jul 21 - Tue, Jul 28
American Airlines Logo
7:00 am - 11:32 pm
SJO
-
STL
15h 32m
2 stops
American Airlines Logo
7:06 am - 2:37 pm
STL
-
SJO
8h 31m
1 stop
$409American Airlines
Wed, Jul 29 - Thu, Aug 6
United Airlines Logo
12:30 am - 10:07 am
SJO
-
STL
8h 37m
1 stop
United Airlines Logo
8:35 pm - 12:21 pm
STL
-
SJO
16h 46m
2 stops
$417United Airlines
Thu, May 21 - Tue, Jun 2
Multiple Airlines Logo
9:35 am - 11:57 pm
SJO
-
STL
13h 22m
1 stop
Multiple Airlines Logo
4:19 pm - 3:11 pm
STL
-
SJO
23h 52m
1 stop
$422Multiple Airlines
Thu, May 21 - Thu, Jun 4
Multiple Airlines Logo
9:35 am - 11:57 pm
SJO
-
STL
13h 22m
1 stop
Multiple Airlines Logo
4:19 pm - 11:45 am
STL
-
SJO
20h 26m
2 stops
$433Multiple Airlines
Sun, Jun 7 - Fri, Jun 19
Frontier Logo
9:35 am - 10:53 am
SJO
-
STL
24h 18m
1 stop
Frontier Logo
8:08 pm - 8:20 am
STL
-
SJO
37h 12m
2 stops
$434Frontier
Booking Insights

KAYAK's insights & trends for flights to St. Louis

Get data-powered insights and trends for flights to St. Louis to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest flight to St. Louis?

These are the best round-trip prices found by users searching on KAYAK in the last 72 hours.

In the last 3 days, the cheapest flight deal to St. Louis was found on the route from San José, at $370 return. The most popular connection is from New York to St. Louis and KAYAK users have found round-trip deals for as low as $295 in the last 3 days.

What is the cheapest month to fly to St. Louis?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights to St. Louis, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights to St. Louis is October, where tickets cost $336 on average for return flights. On the other hand, the most expensive months are January and March, where the average cost of tickets from Costa Rica is $720 and $531 respectively. For one-way flights, the best month to travel is October with an average price of $336.

Good to know

Low seasonOctober
Cheapest flight$207
Best time to beat the crowds with an average 29% drop in price.
Most popular time to fly with an average 5% increase in price.
Flight from San José to St. Louis

FAQs - booking St. Louis flights

  • What is the cheapest flight to St. Louis?

    In the last 3 days, the cheapest flight deal to St. Louis was found on the route from San José, at $370 return. The most popular connection is from New York to St. Louis and KAYAK users have found round-trip deals for as low as $295 in the last 3 days.

  • How far is Lambert-St Louis Airport from central St. Louis?

    The city center of St. Louis is 13 miles from Lambert-St Louis Airport.

  • What is the name of St. Louis’s airport?

    There is only 1 airport in St. Louis, called Lambert-St Louis Airport (STL). It can also be referred to as Lambert Field, Lambert-St Louis, St. Louis Lambert, or St. Louis Lambert Intl.

  • How does KAYAK find such low prices on flights to St. Louis?

    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 to St. Louis.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket to St. Louis?

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

  • What is the Hacker Fare option on flights to St. Louis?

    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 to St. Louis 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 to St. Louis?

    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 to St. Louis up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

  • How many direct flights to St. Louis are there each week?

    Each week there are around 2,970 direct flights from within Costa Rica to St. Louis. The most common day for departures is Sunday, with 16% of flights taking off on this day.

Top tips for finding cheap flights to St. Louis

  • Enter your preferred departure airport and travel dates into the search form above to unlock the latest St. Louis flight deals.

Reviews of the top airlines flying from Costa Rica to St. Louis

 
See real verified KAYAK customer reviews for airlines flying to St. Louis. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline from Costa Rica to St. Louis. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with to St. Louis? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.4
United AirlinesOverall score based on 9677 reviews
7.1Entertainment
7.7Boarding
6.6Food
7.3Comfort
8.1Crew
Airline reviews

Flew steerage class. Short on leg room unless you pay more. No window unless you pay more. Etc. United is trying to squeeze every cent from you. It doesn’t make for any loyalty.

6.0 GoodAnonymous, Apr 2026
HND - SFO
Read more United Airlines reviews

Flew steerage class. Short on leg room unless you pay more. No window unless you pay more. Etc. United is trying to squeeze every cent from you. It doesn’t make for any loyalty.

Booked through Kayak Business, had a seat in middle and towards back due to booking rate, not comfortable.

Was great in general, try to respect time and excuses when slight changes have been made, appreciated!

A long delay. Don't travel late in the day.

Super friendly with lots of drink options an entertainment. Friendly crew.

Flight crew was super friendly and helpful. Food was frequent and honestly pretty good. Plenty of on-board entertainment. Economy seats are super cramped for such a long flight, but the crew allowed people to get up and stretch, and kids could wander with their parents, so we all made it work. Overall a very good experience.

Standard flight with a drinks and a snack- overall very quick flight. The flight attendants were very strict, bordered on rude.

Outstanding service, efficient & friendly crew, flight was safe, comfortable & on time

Outstanding service, great food, friendly & efficient crew, safe & comfortable flight

Staff were not attentive, wifi did not work, cut my head in the bathroom due to the position of the soap on the sink, had blood running down my face, told staff, they had no expression no sympathy, didn't even say "sorry", they said "oh we will have a look at that" about 10 mins later the purser brought me a bandaid, still no sorry.... Shocking

Left early arrived early..right amount of talking from pilots..of course had to love the biscuit and water!

I would like a refund for the extra cost the seat I paid for. An oversized person sat next to me and I couldn’t fit on my seat and had to move to another seat.

Boarding gate at LAX was too crowded—two gates next to one another

The flight was delayed about an hour for a maintenance specialist to approve the maintenance repair

This flight was delayed but it worked in my favor because my Atlanta to Dallas flight was delayed.

This was a hard flight. 3 delays out of OKC (1 on the Tarmac). Delay in Atlanta coming to Dallas. total travel time was the equivalent of driving from OKC to Atlanta.

Like: flights are on time, good boarding process Can improve: planes are old, improve entertainment and make space more comfortable

Had to wait for a gate for a long time, then waited on the run way for a long time before leaving. The actual flights part was good.

Poor... food was horrible, boarding very slow, service on board mediocre

The airplane was an old model, the overhead didn’t have enough room for people’s items and made boarding and boarding disappointing and stressful. Crew allowed passengers to bring more than the permitted baggage sizes.

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
O'Fallon
Wentzville
Farmington
Eureka
Litchfield
Grafton
Shrewsbury
Glencoe

Everything you need to know for your flight to St. Louis

Information on the airport you'll fly into in St. Louis