$137 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 9/2. 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

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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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

Wed, Sep 3 - Tue, Oct 14
American Airlines Logo
6:00 am - 11:59 pmSJO-STL
16h 59m1 stop
American Airlines Logo
8:49 am - 6:16 pmSTL-SJO
10h 27m1 stop
$226American Airlines
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Wed, Sep 3 - Tue, Oct 14
American Airlines Logo
6:00 am - 9:10 pmSJO-STL
14h 10m2 stops
American Airlines Logo
8:49 am - 6:16 pmSTL-SJO
10h 27m1 stop
$230American Airlines
Find Deal
Wed, Sep 3 - Tue, Oct 14
American Airlines Logo
6:00 am - 9:10 pmSJO-STL
14h 10m2 stops
American Airlines Logo
6:25 am - 6:16 pmSTL-SJO
12h 51m2 stops
$306American Airlines
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Wed, Sep 3 - Tue, Oct 14
Spirit Airlines Logo
12:18 pm - 9:40 amSJO-STL
20h 22m1 stop
Spirit Airlines Logo
10:35 am - 11:14 amSTL-SJO
25h 39m1 stop
$310Spirit Airlines
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Thu, Sep 4 - Sun, Oct 12
United Airlines Logo
7:55 am - 9:57 amSJO-STL
25h 02m1 stop
United Airlines Logo
6:15 am - 7:37 pmSTL-SJO
14h 22m1 stop
$320United Airlines
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Sat, Sep 6 - Tue, Oct 14
Spirit Airlines Logo
12:19 pm - 9:40 amSJO-STL
20h 21m1 stop
Spirit Airlines Logo
10:35 am - 11:14 amSTL-SJO
25h 39m1 stop
$323Spirit Airlines
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Thu, Sep 4 - Sun, Oct 12
United Airlines Logo
7:55 am - 6:58 pmSJO-STL
10h 03m1 stop
United Airlines Logo
6:15 am - 7:37 pmSTL-SJO
14h 22m1 stop
$326United Airlines
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Wed, Aug 27 - Tue, Sep 2
Southwest Logo
8:50 am - 8:00 pmSJO-STL
10h 10m1 stop
Southwest Logo
7:45 am - 6:55 pmSTL-SJO
12h 10m1 stop
$329Southwest
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Thu, Aug 28 - Wed, Sep 3
 Logo
9:35 am - 10:08 pmSJO-STL
11h 33m2 stops
 Logo
8:20 am - 6:45 pmSTL-SJO
11h 25m2 stops
Wed, Sep 3 - Mon, Oct 13
 Logo
12:18 pm - 9:40 amSJO-STL
20h 22m1 stop
 Logo
2:22 pm - 10:27 amSTL-SJO
21h 05m1 stop
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 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 August, where tickets cost $407 on average for return flights. On the other hand, the most expensive months are April and November, where the average cost of tickets from Costa Rica is $676 and $607 respectively. For one-way flights, the best month to travel is August with an average price of $407.


Good to know

Low seasonMarch
Cheapest flight$137
Best time to beat the crowds but there is an average 4% increase in price.
Most popular time to fly and prices are also 1% lower on average.
Flight from San José to St. Louis

FAQs - booking St. Louis flights

  • 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.

  • What is the cheapest day to fly to St. Louis?

    Based on KAYAK data, the cheapest day to fly to St. Louis is Tuesday where round-trip tickets can be as cheap as $420. On the other hand, the most expensive day to fly is Monday, where round-trip prices are $690 on average.

  • 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.

  • What is the cheapest time of day to fly to St. Louis?

    The cheapest time of day to fly to St. Louis is generally in the morning, when round-trip flights cost $479 on average. The most expensive time of day to fly to St. Louis is generally in the evening, which is peak travel time and where the average cost of a ticket is $561.

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

    Each week there are around 1,509 direct flights from within Costa Rica to St. Louis. The most common day for departures is Sunday, with 17% 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 8896 reviews
8.1Crew
6.6Food
7.7Boarding
7.3Comfort
7.1Entertainment
Airline reviews

Was on time until within 1 hour of flight-how does that happen? Staff very friendly.

8.0 ExcellentHal, Jul 2025IAD - MSY
Read more United Airlines reviews

Was on time until within 1 hour of flight-how does that happen? Staff very friendly.

Had one staff that was not pleasant. Seems they are stressed with too many people to care for.

Weather delay in Chicago?. No sense of urgency to make connection in Chicago for our connecting flight that wasn't delayed. Connection was missed.

Ok. Get a different kosher caterer. The food was odd.

Food was terrible. Crew was kind but skipped over my row for providing sandwiches and beverages.

Our flight was understandably diverted to a small regional airport in Laramie, Wyoming due to weather conditions, which I fully recognize and appreciate. However, the low rating stems from the experience that followed: passengers remained on board for over an hour without the option to deplane and stretch, despite the aircraft being stationary. Although the pilot opened the cabin door, only he was permitted to exit. Meanwhile, passengers grew increasingly uncomfortable as warm summer air entered the cabin through the open door, and being in the second row meant we were impacted immediately. While the flight attendants made efforts to keep everyone at ease, I believe allowing passengers to deplane briefly, given the extended delay, would have significantly improved the overall experience.

I never flew. Flight was canceled. DIA worst airport in the country. Avoid at all costs.

Lost luggage, they need a baggage service representative available all times in Atlanta

Our experience on United Airlines was extremely poor. The plane was extremely cold throughout our entire flight- which multiple people complained about- and we had to wait 2 hours to get a blanket which was too thin and barely helped warm us up. As well as this, none of the entertainment features were working so we had to sit through a roughly 10 hour flight with nothing to keep our attention, including the actual flight path screen. It was an extremely disappointing experience and I would hope that this gets fixed if we ever choose United Airlines again.

I really enjoyed flying with United airlines amazing experience , good customer service and great food

Very poor delay in dfw was really bad n long

Our flight was 1.5 hours delayed. There was no weather for the inbound flight, so I don't understand why. This meant a VERY late arrival and only a quick nap before my morning flight.

Because of rescheduling, they had to put me on a flight that didn't go through Dallas

It was very difficult to stretch my knee out and I am very short. I also had a torn tendon in my knee which made it extra uncomfortable anyways. My husband is 6'2" and I can't imagine him flying in that plane.

3 hour weather delay followed by 1 hour (and counting) maintenance delay. UGH!

Couldn’t get the door on the plane to close leading to a nearly 2 hour delay. But, hey at least they didn’t cancel the flight.

Very clean and comfortable cabin. Amazing Mediterranean salad for lunch before landing. Great range of films to watch. Really quiet and easy to sleep on the flight also. The initial food was a bit weird: odd fried chicken pieces in some weird white gloop, but that would be my lack of cultural knowledge on the grub. Salad more than made up for it at the other end. Staff were super attentive and helpful. Great and easy flight

International baggage recheck process in Philadelphia was a disaster. Waited 1 hour and 45 minutes to receive our bags. Waited 15 minutes to recheck bags, flight notification boards were blank so we asked an AA representative for our connecting gate and we were directed to the wrong terminal and gate. Our connection window was over 3 hours and we made our flight by 5 minutes. We pulled away from the gate and sat on the runway for 1 1/2 hours. 1 of our 4 bags didn’t make it to Phoenix. The mobile app for lost baggage didn’t work, the AA rep had to manually fix.

I miss my flight and they could not rebook me that day because the other flight was full, and for the next day I had to pay a whole new fee again which I think is unprofessional

Flight was cancelled 3 hrs AFTER etd. Thetefore Missed connection from JFK to New Zealand . No accommodation provided… This cost ne aporox 1000 USD in extra expenses and turned whst should have been a 24 hr trip ftom Boston - New Zealand into a VERY expensive , late 70+ hr nightmare … Complete nonsense!!!

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

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

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