$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 9/7. 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, Sep 7 - Mon, Sep 14
Scandinavian Airlines Logo
3:42 pm - 1:30 am
STL
-
HEL
25h 48m
2 stops
Scandinavian Airlines Logo
6:10 am - 8:50 pm
HEL
-
STL
22h 40m
2 stops
$613Scandinavian Airlines
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
Wed, Apr 8 - Wed, Apr 15
Finnair Logo
5:21 pm - 2:15 pm
STL
-
HEL
12h 54m
1 stop
Finnair Logo
4:25 pm - 10:17 pm
HEL
-
STL
13h 52m
1 stop
$627Finnair
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
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, 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
$642Scandinavian Airlines
Wed, Apr 22 - Wed, Apr 29
United Airlines Logo
11:15 am - 6:55 pm
STL
-
HEL
23h 40m
2 stops
United Airlines Logo
6:35 am - 8:54 pm
HEL
-
STL
22h 19m
2 stops
$645United 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.

How long does a flight from St. Louis to Finland take?

The duration of a flight to Finland depends on your arrival airport. The shortest route to Finland from St. Louis is to Helsinki, which takes 17h 23m.

Good to know

Low seasonFebruary
Cheapest flight$613
Best time to beat the crowds with an average 30% 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.
7.6
FinnairOverall score based on 1371 reviews
7.7Boarding
7.5Comfort
6.7Food
8.2Crew
6.9Entertainment
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.

Dloght delayed by 2.5 hrs . Common theme in my last four american floghts

American continues to decline in their customer service and its beyond disappointing.

Mechanical issue delayed us 2hrs and then once we landed sat on tarmac for 30mins because someone left a vehicle in front of the gaye

The crew was excellent and overall the flight was good. No complaints.

I didn't end up taking this flight. I got up at 4am for a flight that was supposed to board at 6am - at 5:55am you delayed the flight to 10am. The airport is under construction so I switched to a later flight as I wasn't going to sit in the airport for 4 hours. They said the delay was due to the crew needing rest from a flight coming in late the night before - if that was the case then I think you should have delayed the flight much sooner so that passengers wouldn't get up so early and get to the airport to sit and wait.

Never had such a lazy first class attendant. Literally spent 60%+ of the flight playing games on her personal phone making up excuses of why she was unavailable.

The flight attendants and the service is getting worse by the day.

Not to have gotten delayed by 2+ hours for the fourth straight American flight. They're the worst.

Like all of the flights I took to get down to Dallas. They were delayed

Other than nearly three hour delay for maintenance issues, everything went smooth

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

Information on your arrival and departure airports