$613 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 4/27. 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

Mon, Apr 27 - Tue, May 12
Finnair Logo
5:21 pm - 2:15 pm
STL
-
HEL
12h 54m
1 stop
Finnair Logo
4:25 pm - 10:19 pm
HEL
-
STL
13h 54m
1 stop
$613Finnair
Tue, Apr 21 - Tue, Apr 28
American Airlines Logo
7:12 am - 10:45 am
STL
-
HEL
19h 33m
1 stop
American Airlines Logo
12:20 pm - 7:30 pm
HEL
-
STL
15h 10m
1 stop
$623American Airlines
Tue, Apr 21 - Tue, Apr 28
Finnair Logo
12:27 pm - 10:45 am
STL
-
HEL
14h 18m
1 stop
Finnair Logo
12:20 pm - 7:30 pm
HEL
-
STL
15h 10m
1 stop
$631Finnair
Tue, Apr 21 - Tue, Apr 28
Iberia Logo
2:33 pm - 3:25 pm
STL
-
HEL
16h 52m
2 stops
Iberia Logo
12:20 pm - 10:59 pm
HEL
-
STL
18h 39m
1 stop
$632Iberia
Tue, Apr 21 - Tue, Apr 28
American Airlines Logo
12:27 pm - 2:00 pm
STL
-
HEL
17h 33m
2 stops
American Airlines Logo
12:20 pm - 10:59 pm
HEL
-
STL
18h 39m
1 stop
$635American Airlines
Tue, Apr 21 - Tue, Apr 28
American Airlines Logo
2:33 pm - 2:00 pm
STL
-
HEL
15h 27m
2 stops
American Airlines Logo
12:20 pm - 11:46 pm
HEL
-
STL
19h 26m
2 stops
$637American Airlines
Mon, Apr 27 - Tue, May 12
KLM Logo
5:35 pm - 5:40 pm
STL
-
HEL
16h 05m
2 stops
KLM Logo
7:00 am - 4:10 pm
HEL
-
STL
17h 10m
2 stops
$639KLM
Tue, Apr 21 - Tue, Apr 28
KLM Logo
1:46 pm - 1:05 pm
STL
-
HEL
15h 19m
2 stops
KLM Logo
1:55 pm - 11:36 pm
HEL
-
STL
17h 41m
2 stops
$640KLM
Mon, Mar 30 - Mon, Apr 6
Air France Logo
5:59 pm - 5:40 pm
STL
-
HEL
15h 41m
2 stops
Air France Logo
7:00 am - 9:06 pm
HEL
-
STL
22h 06m
2 stops
$650Air France
Sun, Apr 19 - Sun, Apr 26
American Airlines Logo
12:27 pm - 2:15 pm
STL
-
HEL
17h 48m
1 stop
American Airlines Logo
12:35 pm - 10:59 pm
HEL
-
STL
18h 24m
1 stop
$681American Airlines
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 KLM ($639) and United Airlines ($740).

Good to know

Low seasonFebruary
Cheapest flight$613
Best time to beat the crowds with an average 32% drop in price.
Most popular time to fly with an average 36% 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.
7.6
FinnairOverall score based on 1370 reviews
6.7Food
6.9Entertainment
8.2Crew
7.5Comfort
7.7Boarding
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.

The baggage claim experience was poor. The plane crew and the AA app said that checked baggage in CLT would be at carousel 7 but the sign at Baggage Claim said carousel 1. The carousel 1 sign had the correct flight # listed above the belt. But the luggage never came. I went to an AA baggage claim office after about 1 hour and the clerk directed me to another AA room that was poorly marked, with a closed door and no obvious way to know what to do. Finally someone opened the door and my bag was inside. The clerk was totally unable to explain why.

They are rarely on time! Very hard to plan your travels when flights or connections keep getting delayed.

Flight delay for mechanical. Inbound arrived on time. No one said why mechanical delay.

Forced to check bags. Crew uninterested in collecting trash. Unclean seats.

why would I bother with this airline and pick seats when I am asked to move for a weight imbalance

Flight pulled out on time but sat on runway for 30 mins. It was extremely cold in the aircraft despite wearing a winter coat. Surprisingly they had a vegetarian meal but could have some better snack choices for a 8 hour flight.

We had a male flight attendant who was super attentive and wonderful! Very professional. I have both gluten and dairy intolerance, and was only able to get a gluten free part, and not the dairy free part of the meal. Easy to order ahead of time and I appreciate being able to do that.

Snow delayed boarding several times, which I understand happens. Issue I had was that after we did board, pilot told us we were going to roll out to be de-iced, then on our way. We were de-iced once, taxied to the tarmac and then stopped. Sat for another 30 minutes or so, the another de-icing. Then we rolled out to a parking spot, only to sit for another hour due to a traffic stop in DCA, which I'm confident they knew would happen before we boarded. Pilot gave no updates other than we had to hold, attendants did speak to the crew, but when asked, said the pilot would be updating us. We on the ground in the plane waiting for over 2 hours. They did communicate that bathrooms would be open, but no other news until we left. Would have been better to be up front about status.

Good crew and flight was on time. It’s a small plane with limited overhead luggage space. They said the overhead space was full and I had to check my bag. There was still space when I got on. Waiting for my checked luggage added 30 minutes to my trip. Not the end of the world but also not great.

My seat was assigned last row behind restrooms No legroom’s I’m very Pettit Still was not comfortable Food choice was excellent

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

Information on your arrival and departure airports