$184 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 9/3. 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
5:34 am - 11:10 amSTL-SJO
6h 36m1 stop
$278American Airlines
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Wed, Sep 3 - Tue, Oct 14
American Airlines Logo
6:00 am - 11:59 pmSJO-STL
16h 59m1 stop
American Airlines Logo
4:55 pm - 11:10 amSTL-SJO
19h 15m2 stops
$283American Airlines
Find Deal
Thu, Sep 4 - Tue, Oct 14
United Airlines Logo
1:30 pm - 10:08 pmSJO-STL
7h 38m1 stop
United Airlines Logo
6:15 am - 12:26 pmSTL-SJO
7h 11m1 stop
$326United Airlines
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Thu, Sep 4 - Tue, Oct 14
Delta Logo
1:35 pm - 10:02 pmSJO-STL
7h 27m1 stop
Delta Logo
6:00 am - 11:48 amSTL-SJO
6h 48m1 stop
$327Delta
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Thu, Sep 4 - Tue, Oct 14
United Airlines Logo
1:30 pm - 10:08 pmSJO-STL
7h 38m1 stop
United Airlines Logo
12:25 pm - 12:26 pmSTL-SJO
25h 01m2 stops
$340United Airlines
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Fri, Jul 18 - Thu, Jul 31
Spirit Airlines Logo
11:24 am - 9:40 amSJO-STL
21h 16m1 stop
Spirit Airlines Logo
5:26 pm - 11:11 amSTL-SJO
18h 45m1 stop
$417Spirit Airlines
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Sun, Jul 6 - Tue, Jul 15
Spirit Airlines Logo
12:28 pm - 10:33 amSJO-STL
21h 05m1 stop
Spirit Airlines Logo
5:26 pm - 11:11 amSTL-SJO
18h 45m1 stop
$457Spirit Airlines
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Sun, Aug 10 - Fri, Aug 15
 Logo
7:30 am - 9:52 amSJO-STL
25h 22m3 stops
 Logo
2:27 pm - 10:32 amSTL-SJO
45h 05m3 stops
Sun, Aug 10 - Fri, Aug 15
 Logo
7:30 am - 9:52 amSJO-STL
25h 22m3 stops
 Logo
2:27 pm - 3:13 pmSTL-SJO
25h 46m2 stops
Sun, Aug 10 - Fri, Dec 12
Delta Logo
1:21 pm - 11:53 pmSJO-STL
9h 32m1 stop
Delta Logo
6:00 am - 12:52 pmSTL-SJO
6h 52m1 stop
$510Delta
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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 February, where tickets cost $397 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 $575 respectively. For one-way flights, the best month to travel is February with an average price of $397.

How far in advance should I book a flight to St. Louis?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights to St. Louis, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price, you should book around 4 weeks before departure. For the absolute cheapest price, our data suggests you should book 11 weeks before departure.


Good to know

Low seasonMarch
High seasonJuly
Cheapest flight$184
Best time to beat the crowds but there is an average 6% increase in price.
Most popular time to fly and prices are also 17% 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 1,596 direct flights from within Costa Rica to St. Louis. The most common day for departures is Friday, with 15% 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.

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 8801 reviews
6.6Food
7.7Boarding
7.3Comfort
8.1Crew
7.0Entertainment
Airline reviews

Gate agent did not hold flight for connection, provided no assistance to get new flight

2.0 MediocreJack, Jun 2025SAT - IAH
Read more United Airlines reviews

Gate agent did not hold flight for connection, provided no assistance to get new flight

Evidently, my seat had the only broken TV. I couldn’t plug it in, get it to come on, or watch anything, and of course, no one could fix it while we were on the plane. The service was good and the boarding was quick

United airlines, mediocre at best. No issues , nothing great . Worked for me

Efficient, calm when things were delayed and kept us regularly informed of what was happening.

it was so bad. I tried to board my flight from vancouver to saskatoon. And to my surprise they did not board me cause the flight was changed and no email was send to me. and on my boarding pass which i got from seattle says different flight. I did not knew anyone from Vancouver, air canada crew was rude, i asked for today flight but they were rude and i had early morning dental appointment in saskatoon. I was so much in pain and my whole day is wasted today. and i suffered alot. They did provide me hotel but they did not provide me any food. I am really really disappointed first time had so bad experience with air canada. I may think twice to book it again. If i can get any reply or any composition that would be great. Thanks

It was fine, definitely older planes with no charging or anything. There’s no entertainment set up on board, but it is nice that they allow you to access the in flight entertainment from your phone without having to pay for the Wi-Fi and they do offer free texting.

Boarding was mayhem. Late boarding by 15 minutes because of lack of staff (missing 1 flight attendant. We had to wait for an arrival of another plane before we could board). Flight was a little rough, but cannot blame on airlines.

Impressed with the service despite turbulence because of the weather. Both flights arrived before their scheduled times.

Very comfortable (upgraded to business class). The audio on my screen didn’t work, but I managed to play the audio through my phone while watching the screen.

Great experience…left a bit behind schedule but made up fir that in the air and landed 10 minutes early 😁

They cancelled my flight and downgraded me to economy and only gave me $250 for the downgrade

Loved the staff, boarding and drink options! Wish the comfort of the seat could have been better nevertheless

The flight crew were friendly and attentive. Food was good and they passed out ice cream and drinks awhile after Lunch was done. The ice cream was a nice treat! I found several movies to watch during the flight. There was many movies and tv shows to choose from. We flew Premium economy and there was enough leg room to be comfortable. The seats were also comfortable. I would fly AA again if the airfare isn’t expensive.

The chair cushions may need an upgrade. I have been noticing they are so worn out, thin so you’d sit in a dip 😄. Other than that, all was an enjoyable trip. Thanks AA!

I’m impressed that we were on time in Sacramento after having a late departure in Newark and our made it. The staff was friendly and warm.

Cramped seats. FAA should make airlines have more legroom, for even short people complain

5.5 hour delay with no explanation on why, along with no proactive effort to reaccomodate me.

It was one of my worst flight ever. First they were changing the gate for at least 4 times, changing from gate D7 to D12 to D44. Considering the size of the Miami Airport, we are talking about long distance and the train at the airport was not working. Then the flight was delayed around one hour. Then finally we boarded into the plane and when everybody was seated, there was an announcement that there is an issue with one of the tire of the plane, so we all had to get out of the plane with our belongings, to replace the tire. So we had around 2.5-hour delay

Most miserable flight ever. We waited almost 2 hours on the runway because the flight was oversold. American offered $1200 credit. Then there was some nonsense about weight distribution. Ridiculous. No food for 8 plus hours on the flight. I will be writing a letter.

Honestly, I haven’t flown American in years, probably due to the pandemic and my being unable to travel for certain periods in the last two years, but it was a good experience to dig out or obtain a new American Airlines account after many years of traveling for business with American in the past.

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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