$361 Find Cheap Flights from St. Louis to Finland

This is the cheapest round-trip flight price found by a KAYAK user in the last 72 hours by searching for a flight from St. Louis to Finland departing on 5/1. 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

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Flight Deals

Book Cheap St. Louis to Finland Plane Tickets

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from St. Louis to Finland 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 St. Louis to Finland

Fri, May 1 - Thu, May 14
Multiple Airlines Logo
8:54 am - 2:15 pm
STL
-
HEL
21h 21m
1 stop
Multiple Airlines Logo
5:15 pm - 11:13 am
HEL
-
STL
25h 58m
1 stop
$819Multiple Airlines
Fri, May 1 - Mon, May 4
Multiple Airlines Logo
5:21 pm - 2:15 pm
STL
-
HEL
12h 54m
1 stop
Multiple Airlines Logo
4:40 pm - 7:33 pm
HEL
-
STL
34h 53m
2 stops
$1,015Multiple Airlines
Fri, May 1 - Thu, May 14
Delta Logo
1:46 pm - 5:40 pm
STL
-
HEL
19h 54m
2 stops
Delta Logo
7:00 am - 2:31 pm
HEL
-
STL
15h 31m
2 stops
$1,021Delta
Fri, May 1 - Mon, May 4
American Airlines Logo
2:33 pm - 2:15 pm
STL
-
HEL
15h 42m
1 stop
American Airlines Logo
4:25 pm - 10:17 pm
HEL
-
STL
13h 52m
1 stop
$1,037American Airlines
Fri, May 1 - Thu, May 14
United Airlines Logo
9:21 am - 1:10 pm
STL
-
HEL
19h 49m
2 stops
United Airlines Logo
1:50 pm - 1:25 pm
HEL
-
STL
31h 35m
1 stop
$1,111United Airlines
Thu, May 21 - Thu, May 28
British Airways Logo
11:18 am - 10:40 pm
STL
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HEL
27h 22m
2 stops
British Airways Logo
12:35 pm - 9:42 pm
HEL
-
STL
17h 07m
1 stop
$1,113British Airways
Mon, Jun 22 - Tue, Jun 30
American Airlines Logo
5:00 pm - 2:15 pm
STL
-
HEL
13h 15m
1 stop
American Airlines Logo
12:30 pm - 11:59 pm
HEL
-
STL
19h 29m
2 stops
$1,163American Airlines
Mon, Jun 22 - Tue, Jun 30
American Airlines Logo
5:40 pm - 3:00 pm
STL
-
HEL
13h 20m
2 stops
American Airlines Logo
12:30 pm - 11:59 pm
HEL
-
STL
19h 29m
2 stops
$1,183American Airlines
Wed, Jul 1 - Wed, Jul 15
United Airlines Logo
6:00 am - 6:55 pm
STL
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HEL
28h 55m
2 stops
United Airlines Logo
6:35 am - 9:26 pm
HEL
-
STL
22h 51m
2 stops
$1,233United Airlines
Fri, May 1 - Mon, May 4
KLM Logo
5:35 pm - 5:40 pm
STL
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HEL
16h 05m
2 stops
KLM Logo
7:00 am - 9:19 pm
HEL
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STL
22h 19m
2 stops
$1,243KLM
Booking Insights

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

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

Which airlines provide the cheapest flights from St. Louis to Finland?

The cheapest round-trip price for the route for each airline clicked by KAYAK users in the last 72 hours.

In the past 3 days, the cheapest round-trip tickets from St. Louis to Finland were found on Delta ($1,021) and United Airlines ($1,111).

Good to know

Low seasonFebruary
Cheapest flight$819
Best time to beat the crowds with an average 30% drop in price.
Most popular time to fly with an average 40% increase in price.
Flight from St. Louis to Helsinki

FAQs - booking Finland flights

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

    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 Finland.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from St. Louis to Finland 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 Finland?

    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 from St. Louis to Finland 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 from St. Louis to Finland?

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

Reviews of the top airlines flying from St. Louis to Finland

 
Need help choosing which airline to fly with from St. Louis to Finland? 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.
7.7
FinnairOverall score based on 1381 reviews
7.7Boarding
7.5Comfort
6.9Entertainment
8.2Crew
6.7Food
Airline reviews

Positive: It was refreshingly easy and polite check-in and boarding staff. Flight was on time and Helsinki is a very well-signposted airport. Shopping was nice as well. Flight was not full and I had lots of space in economy. Flight was perfectly on time. Negative: Food and drink not very good, but that it is normal on any airline. Didn't expect anything else.

8.0 ExcellentFiruz, Feb 2026
HEL - ICN
Read more Finnair reviews

Positive: It was refreshingly easy and polite check-in and boarding staff. Flight was on time and Helsinki is a very well-signposted airport. Shopping was nice as well. Flight was not full and I had lots of space in economy. Flight was perfectly on time. Negative: Food and drink not very good, but that it is normal on any airline. Didn't expect anything else.

Business seating is soooo uncomfortable. You can sit straight up or lay down. You need pillows behind you because the back doesn’t lay down. Those are need to “prop” you up. The chair has no padding whatsoever. Food was gross. I’ve eaten on Finnair before and the food was exceptional. This time it gave 2 people in our party diarrhea. It was the chicken dish. I took 2 bites and didn’t eat anything more. The flight attendants were nice. You needed an additional lounge in Terminal D at DFW Airport. After waiting 40 minutes to enter, we finally gave up and went to a bar across from the club doors. I’m unsure if I’ll ever book a Finnair flight again.

Very good seat, very comfortable, good food, and good service.

It was a good flight, very comfortable seats for sleeping in business class. Probably the most comfortable business class seat I've ever had (20+ times in business class on various airlines). Service was good, but the only downside is my screen didn't work and it had to be reset multiple times to get it to shut off. I had to block my eyes because the screen was white almost the entire flight and I wore an eye mask when I slept. But when eating and reading in my seat, my eyes hurt because the only way to turn the screen off was reset it and the screen would only be off for a few minutes at a time.

Everything was wonderful! AirBus seats are more comfortable to sleep in as compared to the Boeing planes.

Great. It was awesome to have boarding from the front and back of the plane as it made the process go very quickly

It was okay. The airplane was a little smaller than a flight from Thailand to Helsinki.

Wish that everyone would board the back of the plane first. Also let kids on first. The gate wasn’t open at arrival and we waited 45 minutes to takeoff. They made up for time in the air.

This was an absolutely exceptional flight. The flight attendants were extremely attentive and very friendly. They seemed to go out of their way to make us comfortable and to make sure that we had everything we needed., We were in business and were very happy with the size and the details for our pods. We would definitely recommend Finnair and will definitely be flying with them again.

We had an excellent trip with Finnair. This was our first time and we’re very pleased. The only issue was with the boarding - it was a little bit confusing and needs a little bit of streamlining.

Same plane as RDU to LGA — internet not working. Pilot issue of some sort at end of prior flight - I was on same plane for my connection. Late/delayed —

Good flight, seated and had a water within 5 minutes. Crew was hospitable.

Message about flight cancelation was received late due to being in the air. No explanation, just canceled and booked on morning flight. We had to stay in the airport overnight because there was no transportation offered to get to the hotel that AA had available. Actual inflight was fine.

I didn't go from Reno to Phoenix I ended up going from Reno to Dallas to Tucson because my flight rebooked because my Amtrak was late I tried notifying you guys I also don't know what you ask me about my flight because you guys didn't book my flight

Delays experienced in boarding/take off due to incoming plane delayed. However, the boarding time/depart time in the app was significantly delayed in providing these updates. Usually not updated until an hour after we should have already boarded. Poorly managed.

Bag drop was very disorganized in Miami. All main cabin passengers were shunted to just a few lanes and they had an equal number of lanes for first class passengers but there was nobody on those lines. They did nothing to bring the main cab and passengers over to the open lines and they just had employees standing there and doing nothing

there are no options s for snack besides cookies would ve nice to have a salty option n

We did not have enough time to make our connecting flight. As a result, we were put onto a different airline for our second leg. The different airline was NOT comparable to British Airlines, and our arrival was significantly delayed. The actual flight on BA was amazing.

We left at 1030 am pacific from LA and supposed to land at 7 pm Eastern in NY. They made a detour, stopped in Philadelphia and didn’t land till 1130 PM Eastern!!! Worst flight experience with no pilot communication with no explanation as to what was going on. Everyone was very frustrated to say the least.

Going non stop to lax like I paid for. Not stopping in MCI for gas. Too long of delays

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

Information on your arrival and departure airports