$304 Find Cheap Flights from St. Louis to Finland

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 Finland departing on 8/25. 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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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, Sep 7 - Mon, Sep 14
Scandinavian Airlines Logo
3:42 pm - 8:25 pm
STL
-
HEL
20h 43m
2 stops
Scandinavian Airlines Logo
6:10 am - 8:50 pm
HEL
-
STL
22h 40m
2 stops
$699Scandinavian Airlines
Sun, Apr 19 - Tue, May 5
American Airlines Logo
4:30 pm - 2:15 pm
STL
-
HEL
13h 45m
1 stop
American Airlines Logo
4:25 pm - 11:46 pm
HEL
-
STL
15h 21m
1 stop
$726American Airlines
Mon, Sep 7 - Mon, Sep 14
Scandinavian Airlines Logo
1:30 pm - 8:35 pm
STL
-
HEL
23h 05m
3 stops
Scandinavian Airlines Logo
6:10 am - 11:37 pm
HEL
-
STL
25h 27m
2 stops
$728Scandinavian Airlines
Mon, Aug 24 - Sun, Aug 30
Scandinavian Airlines Logo
3:42 pm - 8:25 pm
STL
-
HEL
20h 43m
2 stops
Scandinavian Airlines Logo
4:00 pm - 11:37 pm
HEL
-
STL
39h 37m
2 stops
$734Scandinavian Airlines
Thu, May 7 - Thu, May 14
American Airlines Logo
12:27 pm - 10:45 am
STL
-
HEL
14h 18m
1 stop
American Airlines Logo
4:25 pm - 11:47 am
HEL
-
STL
27h 22m
1 stop
$777American Airlines
Mon, Aug 24 - Sun, Aug 30
Multiple Airlines Logo
10:14 am - 10:45 am
STL
-
HEL
16h 31m
1 stop
Multiple Airlines Logo
4:25 pm - 11:51 pm
HEL
-
STL
15h 26m
1 stop
$790Multiple Airlines
Mon, Sep 7 - Mon, Sep 14
Lufthansa Logo
6:55 pm - 6:55 pm
STL
-
HEL
16h 00m
2 stops
Lufthansa Logo
6:15 pm - 1:25 pm
HEL
-
STL
27h 10m
1 stop
$800Lufthansa
Fri, May 8 - Fri, May 15
American Airlines Logo
12:27 pm - 10:45 am
STL
-
HEL
14h 18m
1 stop
American Airlines Logo
4:25 pm - 11:56 pm
HEL
-
STL
15h 31m
1 stop
$837American Airlines
Sun, Apr 19 - Tue, May 5
British Airways Logo
8:03 pm - 9:00 pm
STL
-
HEL
16h 57m
2 stops
British Airways Logo
12:35 pm - 7:30 pm
HEL
-
STL
14h 55m
1 stop
$849British Airways
Mon, Aug 24 - Sun, Aug 30
Multiple Airlines Logo
12:10 pm - 1:10 pm
STL
-
HEL
17h 00m
2 stops
Multiple Airlines Logo
6:15 pm - 1:25 pm
HEL
-
STL
27h 10m
1 stop
$860Multiple 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 British Airways ($849) and Delta ($849).

Good to know

Low seasonFebruary
Cheapest flight$304
Best time to beat the crowds with an average 29% drop in price.
Most popular time to fly with an average 41% 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 1374 reviews
7.5Comfort
8.2Crew
7.7Boarding
6.9Entertainment
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.

The flight changed gates multiple times and flight had to be delayed multiple times

We called Kayak for a change due to the TSA situation in Atlanta. What we got was a canceled return flight (in error) and we had to find the mistake. Not happy with Kayak who blamed it on AA.

Tv screens and movie selection v good. Friendly staff. They were really worried about max capacity and room for carryons. That is never fun but i had no problem finding space when I boarded.

I was in last row so that is never great bc the person in front of me leaned his seat all the way back into me.

Delayed for mechanical and no updates on what was happening and how long the delay might be.

My flight from LGA was cancelled and my rebooked flight from JFK was delayed numerous times. I will now be getting home after 2am.

Flight was delayed half hour before boarding, but when I checked flight aware the plane that would Pick us up had a delay of more than an hour. AA should let us know in advance to avoid waiting several hours in the airport

On the return flight, arriving in Denver we sat on the tarmac in Denver for over 20 minutes.

Typical AA - late by 90+ mn. Gate changed twice... Changed the departure time 6 times No explanation, no communication on reasons for delay I travel with AA twice a year... and it is consistently very poor.. I will continue to use AA only when i have to.

The flight attendant in business class was excellent! Professional, friendly and attentive.

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

Information on your arrival and departure airports