$166 Find Cheap Flights from St. Louis to Costa Rica

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from St. Louis to Costa Rica departing on 12/3. 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.
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Best Costa Rica Flight Deals

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours

San José
San José1 stop$296
Liberia
Liberia1 stop$446

Good to know

Low season

October

High season

January

Cheapest flight

$166
Best time to beat the crowds with an average 12% drop in price.
Most popular time to fly and prices are also 11% lower on average.
Flight from St. Louis to San José

FAQs - booking Costa Rica flights

  • How does KAYAK find such low prices on flights from St. Louis 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 St. Louis to Costa Rica.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Costa Rica from 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 from St. Louis 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 to Costa Rica with an airline and back to St. Louis with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from St. Louis 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 to Costa Rica from St. Louis up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

Top tips for finding cheap flights to Costa Rica

  • Morning departure is around 24% cheaper than an evening flight, on average*.
*Average of the lowest prices shown in KAYAK’s search results for departures within the next 30 days

Top 5 airlines serving from St. Louis to Costa Rica

Need help choosing which airline to fly with from St. Louis to Costa Rica? 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.
8.1
SouthwestOverall score based on 5005 reviews
7.2Food
8.2Boarding
8.7Crew
7.7Entertainment
8.1Comfort
Airline reviews

This was a nicer flight - not fully booked and so we were able to spread out.

10.0 ExcellentJohn, Nov 2024LAS - IND
Read more Southwest reviews

This was a nicer flight - not fully booked and so we were able to spread out.

We had a nice flight. Boarding was easy, our seats were comfortable and the on board service was pleasant.

Planes are aged. The wifi is unreliable and on many fights, no-existent. The flight attendants were very good.

I had a wonderful flight, but the only thing that annoyed me was how crowded TSA was. I still believe airports and all planes work together to bunch everyone together to drive up cost.

Easy to book and to get check in and get on and off.

The last 30 min or so, they put the heat on full. We thought we were being basted.

Excellent experience. WiFi worked on this leg of My trip

Flight was great, but golf bag never made it until later in the day. Even though I had a nonstop flight it was placed on a different one. They made it right with flight credits and I was able to get it the same day.

It seems as though the provisions are even less. Although SWA used to be an economy Airline, that isn't really the case anymore. I paid over $700. for a round trip to Denver and I could have flown just about any airline for the price. The drinks are now in a 6-ounce cup and with ice I'm sure a can would fill more than 2 cups. However, I am very proud of SWA for using paper rather than continuing to contribute to the millions of plastic cups being used each day. I've thought of this fr many years and am so glad to see it come to fruition, if not by only SWA so far.

Exceptional crew! Friendly and professional. Pleasant attitude and treated everyone with respect.

I sat in comfort plus. It was fine. Seats were comfortable. I got drinks and snacks.

Crew was nice. Flight was timely. Seats could be better as well as the food considering it’s first class.

Left on time and arrived early this extending our 31 minute transfer. Bags made it also!

Good and consistent Printer in lounge did not work for me :(

Most of my discomfort was going through TSA. However, the Delta seats had inadequate leg room and I tried my very best to connect to the wi-fi and it was a cumbersome process that finally gave me the info that I needed to sign in AFTER I had completed the flight...Why make it so difficult to use? That said I really really appreciate the pilot taking a little extra time to avoid a bad storm area and both landings in Atlanta and Orlando were flawless to my delight!!!

Delayed in taking off because no flight crew. The in seat entertainment was working properly.

All fine save for the abominable catering. Really gone downhill. We found it all inedible.

I upgraded to first class only to find out that I still had no access to the sky lounge without a sky miles card or AmEx (something that should be emphasized outside of the fine print!) Also, no food or drink service provided during the flight, so I basically paid 4x more just for “free” checked baggage and a bigger seat. Not worth it.

I appreciated friendly service from check-in, to boarding, to in-flight amenities! Attendants were accommodating and helpful. Thank you! Elaine

Delta was really good about being transparent with why we were delayed it’s just that’s the plane was really old and outdated and a lot of the comfort and amenities we know Delta to have did not shine through

There was no USB plug in my section of the plane. So I could not charge my phone. Also, there was no screen to watch movie or anything like that. Wish I had known that in advance, I would’ve brought my iPad.

Had a crying baby and a toddler behind me so it was difficult to get comfortable. Searing was tight even for a relatively small person like myself (5’8” 155). Fast flight but arrived so early the gate assigned was still occupied by another plane so we had to wait for about 20-25 minutes to get reassigned to a new gate and get over there.

Best part: It’s operated by All Nippon Airways. It’s quite literally comfortable, reliable and respected from boarding to landing each and every time. It’s perfection without extremity in lavishness — it’s how flying should always be!

The flight attendants were unhelpful. It was a packed flight, and usually a flight attendant would help find a spot in the bin for your carry on or shift things around. Neither made any effort to do so. Also, I had to then check my bag. I was told it would be on the carousel in YYZ, but it came up on the jetway. So lucky I saw others standing around for their bags. I would have walked straight past this and on to the carousel. They could have at least told me that they had given me wrong information. Very unsatisfactory.

Made all groups except 2 check despite ample bin space. Inflight WiFi and entertainment didn’t work most of the time.

The check-in process is not the best They should have agents in site to help with any problem especially a rebook. Why does one have to get on the phone when there were at least 8 agents around that could have help?! Flying is stressful as it is and having someone willing to do their customer service will ease some of the stress.

It was a good flight. Nothing comes to mind about how it could have been better. It was a newer plane, seemed like a great upgrade from your older ones. Staff was very good as well.

Seats are smaller and harder than other airlines we have travels with. Food was edible but no good. The sandwich was the only thing I would eat again. They did have a lot of movies to watch.

boarding was uneventful. Snack was pathetic. A tiny fruit bar. Entertainment was limited to just select movies on your own tablet or phone. No live TV. I recently flew Jetblue and they had unlimited snacks and live satellite TV the entire flight. My seat was an exit seat, 20A. It was super uncomfortable. It felt cramped and the middle seat was taken up by a large woman who pushed into my shoulder and arm. Horrible flight.

I liked that the flight to Kosice was on time, the service was excellent and we arrived to Vienna early. The only thing I did not like, is that I had to pay for my suitcase $75. Bummer

Finding the gate was very confusing. Our boarding pass listed one gate and the staff verbally told us a different gate.

Plenty of overhead space but forced to check my carry-ons both legs

My flight attendant was attentive! The elderly person next to me was flatulent and the flight attendant could see that I was in distress and brought me some face masks

It was as expected for such a short flight. No complaints

The departing flight from Newark to Charlotte was fine. It was the returning flight from Charlotte to Newark that was awful. We had scheduled an 8:35pm return flight time. We got delayed TEN times all the way to 5am in the morning! We were told over 4 different excuses as to why the flight kept getting delayed. First it was the flight crew needed to rest, then it was something technical with the plane, then it was something with air traffic control, and finally it was because they couldn’t find a captain and had to wait until the morning so the captain could get some rest. It was terrible sleeping overnight in the airport. They offered a $12 meal voucher. That was it! And the only place open in the middle of the night was Dunkin’ Donuts who didn’t even accept the voucher. They should have cancelled the flight much earlier on in the evening instead of just stringing us along hour by hour with more delays. Not professional and unacceptable. There was no refund for inconvenience. I probably will not be flying American Airlines again.

This leg they tried and did well with what they had to work from.

It was nice being on a flight that had working wifi. The boarding was quick - why don’t all airlines have small boarding groups window to aisle? Makes so much sense!!! I was disappointed to be the first person stopped to have to gate check my carryon. Especially when there was plenty of overhead space at the back! But I get it…keeps it moving. Crew was nice.

The flight was as good as it gets when flying. On time departure and arrival plus no lost luggage.

My boarding pass wouldn't pull up in the app very easily and had to really dig through my email. That caused a delay in TSA..

Packed commercial flight was as comfortable as can be expected

Boarding was slow the scanner broke mid through boarding and they had to manually do it

Average, boarding was ok, the eye scanner broken mid way through boarding they ahd to do it manually. Did not eat any food, Not even water was offered for free.

Boarding attendant was rude. Crew on the plan were more interested in talking amongst themselves and did not ask parentage if they needed anything or even walk down the isles.

Flight was ok with exception of the multiple delays. As with all Spirit flights, the sights are extremely uncomfortable and lack leg space. However, the price savings is the plus.

WiFi didn’t work despite paying for it. Crew was nice.

I upgraded my ticket at the ticket counter and was not informed of the huge bottleneck at TSA pre check. It took me over an hour to get through the line at this small airport and although I ran to the gate and reached it prior to scheduled departure, it had already pushed pack. I missed the flight. Spirit rebooked me on a flight to Orlando that evening, which would require me to then rent a car and drive to FLL. For scheduling reasons, I determined it be would better to rent a car in Pensacola and drive it to my destination in FLL. Spirit called me that evening and asked me if I was going to board the plane. I explained no, for scheduling reasons. The person apologized and said I would receive a refund, but I have not heard back. Certainly, I ought to be refunded the upgrade I paid for at the counter.

The staff from LAX to New Orleans were rude but the staff from New Orleans to LAX were nice!

Did what they needed to do. Brought us from point A to point B timely and without issue. Boarding through deplaning smooth.

Direct 2.5 hour flight good. Free snacks and coffee, water, or soft drinks not available...bad.

Atlanta airport gate area floor and nearly all seats disgusting. Spirit airlines crew fantastic!!

Book cheap flights from St. Louis to Costa Rica

Recent round-trip flight deals

1/28Tue
1 stopSpirit Airlines
9h 11mSTL-SJO
2/3Mon
1 stopSpirit Airlines
12h 46mSJO-STL
$296
2/2Sun
1 stopSpirit Airlines
9h 11mSTL-SJO
2/10Mon
1 stopSpirit Airlines
12h 46mSJO-STL
$354
2/4Tue
1 stopSpirit Airlines
9h 11mSTL-SJO
2/12Wed
1 stopSpirit Airlines
28h 58mSJO-STL
$359
12/4Wed
1 stop
18h 26mSTL-SJO
12/11Wed
1 stop
11h 01mSJO-STL
$380
2/3Mon
1 stopAmerican Airlines
18h 06mSTL-SJO
2/12Wed
1 stopAmerican Airlines
16h 17mSJO-STL
$386
12/4Wed
2 stops
31h 51mSTL-SJO
12/11Wed
1 stop
25h 57mSJO-STL
$389
2/3Mon
2 stopsAmerican Airlines
11h 07mSTL-SJO
2/11Tue
2 stopsAmerican Airlines
11h 22mSJO-STL
$391
4/23Wed
1 stopUnited Airlines
14h 22mSTL-SJO
4/30Wed
1 stopUnited Airlines
7h 36mSJO-STL
$476
4/26Sat
2 stopsUnited Airlines
17h 45mSTL-SJO
4/30Wed
2 stopsUnited Airlines
24h 15mSJO-STL
$481
4/20Sun
2 stopsSouthwest
14h 20mSTL-SJO
4/26Sat
2 stopsSouthwest
12h 15mSJO-STL
$614

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Recent one-way flight deals

12/3Tue
1 stopSpirit Airlines
7h 40mSTL-SJO
$166
1/7Tue
1 stopSpirit Airlines
8h 27mSTL-SJO
$168
3/26Wed
1 stopDelta
6h 40mSTL-SJO
$174
12/4Wed
2 stops
31h 51mSTL-SJO
$184
12/3Tue
1 stop
18h 26mSTL-SJO
$201
2/23Sun
2 stopsAmerican Airlines
17h 55mSTL-LIR
$207
1/30Thu
1 stopAmerican Airlines
18h 01mSTL-LIR
$213
3/29Sat
2 stopsUnited Airlines
17h 30mSTL-SJO
$219
3/26Wed
2 stopsUnited Airlines
13h 55mSTL-SJO
$225
12/1Sun
1 stopDelta
8h 44mSTL-SJO
$379

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Last minute flights from St. Louis to Costa Rica

Last minute flight, train and bus deals

11/24Sun
multi-stopSpirit Airlines
18h 10mSTL-SJO
11/25Mon
multi-stopSpirit Airlines
14h 30mSJO-STL
$624
11/24Sun
multi-stopSpirit Airlines
18h 10mSTL-SJO
11/25Mon
multi-stopSpirit Airlines
14h 30mSJO-STL
$630
11/24Sun
multi-stopSpirit Airlines
7h 40mSTL-SJO
11/25Mon
multi-stopSpirit Airlines
14h 30mSJO-STL
$638
11/24Sun
multi-stopSpirit Airlines
7h 40mSTL-SJO
11/25Mon
multi-stopSpirit Airlines
14h 30mSJO-STL
$643
11/24Sun
multi-stop
28h 01mSTL-SJO
11/26Tue
multi-stop
30h 24mSJO-STL
$660
11/24Sun
multi-stop
18h 10mSTL-SJO
11/26Tue
multi-stop
24h 54mSJO-STL
$672
11/23Sat
multi-stop
7h 40mSTL-SJO
11/25Mon
multi-stop
21h 18mSJO-STL
$684
11/23Sat
multi-stopSpirit Airlines
7h 40mSTL-SJO
11/25Mon
multi-stopSpirit Airlines
26h 55mSJO-STL
$688
11/24Sun
multi-stopUnited Airlines
14h 24mSTL-SJO
11/26Tue
multi-stopUnited Airlines
7h 52mSJO-STL
$736
11/24Sun
multi-stopUnited Airlines
17h 45mSTL-SJO
12/2Mon
multi-stopUnited Airlines
9h 10mSJO-STL
$741

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Everything you need to know for your flight from St. Louis to Costa Rica

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