$470 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 3/30. 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, Mar 30 - Tue, Apr 14
Finnair Logo
11:22 am - 11:50 am
STL
-
HEL
16h 28m
1 stop
Finnair Logo
12:35 pm - 7:30 pm
HEL
-
STL
14h 55m
1 stop
$470Finnair
Mon, Mar 30 - Tue, Apr 14
Multiple Airlines Logo
11:41 am - 2:00 pm
STL
-
HEL
18h 19m
1 stop
Multiple Airlines Logo
12:35 pm - 11:46 pm
HEL
-
STL
19h 11m
2 stops
$475Multiple Airlines
Mon, Mar 30 - Tue, Apr 14
KLM Logo
5:25 pm - 5:40 pm
STL
-
HEL
16h 15m
2 stops
KLM Logo
7:00 am - 8:42 pm
HEL
-
STL
21h 42m
2 stops
$495KLM
Tue, Mar 31 - Tue, Apr 7
United Airlines Logo
10:00 am - 6:55 pm
STL
-
HEL
24h 55m
2 stops
United Airlines Logo
7:05 am - 8:25 am
HEL
-
STL
33h 20m
2 stops
$500United Airlines
Tue, Mar 31 - Tue, Apr 7
United Airlines Logo
4:30 pm - 6:55 pm
STL
-
HEL
18h 25m
2 stops
United Airlines Logo
2:05 pm - 1:25 pm
HEL
-
STL
31h 20m
1 stop
$511United Airlines
Mon, Apr 13 - Sun, Apr 26
American Airlines Logo
9:34 am - 10:45 am
STL
-
HEL
17h 11m
1 stop
American Airlines Logo
12:35 pm - 10:59 pm
HEL
-
STL
18h 24m
1 stop
$534American Airlines
Mon, Apr 13 - Sun, Apr 26
United Airlines Logo
6:05 pm - 6:55 pm
STL
-
HEL
16h 50m
2 stops
United Airlines Logo
6:45 am - 1:25 pm
HEL
-
STL
14h 40m
1 stop
$540United Airlines
Mon, Apr 13 - Sun, Apr 26
United Airlines Logo
6:05 pm - 6:55 pm
STL
-
HEL
16h 50m
2 stops
United Airlines Logo
6:45 am - 3:24 pm
HEL
-
STL
16h 39m
2 stops
$548United Airlines
Sat, Apr 4 - Sat, Apr 11
United Airlines Logo
8:00 am - 1:00 pm
STL
-
HEL
21h 00m
2 stops
United Airlines Logo
6:45 am - 8:25 am
HEL
-
STL
33h 40m
2 stops
$612United Airlines
Sun, May 17 - Wed, May 27
Finnair Logo
5:21 pm - 2:15 pm
STL
-
HEL
12h 54m
1 stop
Finnair Logo
4:25 pm - 11:54 pm
HEL
-
STL
15h 29m
1 stop
$673Finnair
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 Finnair ($470) and KLM ($495).

Find deals

Good to know

Low seasonFebruary
Cheapest flight$470
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 airline 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.
7.2
American AirlinesOverall score based on 11304 reviews
7.5Boarding
6.4Food
6.9Entertainment
7.2Comfort
8.0Crew
Airline reviews

No Snacks or Entertainment. The flight was short, snacks should still be given.

8.0 ExcellentTonya, Feb 2026
ORD - SDF
Read more American Airlines reviews

No Snacks or Entertainment. The flight was short, snacks should still be given.

We lost a day of our vacation because AA did not get the plane to the gate on time. Even though the gate attendant was very clear that it was not weather related, AA would do nothing because there was some snow that day. They basically said the gate attendant was wrong even though she was on the front line of the situation and they were not.

See prior comment about how Kayak mishandled my reservation and delayed my arrival by 6 hours.

American Airlines was great and worked very hard to change my ticket so I could get an earlier, direct flight back to Dallas. However, I was informed that Kayak made mistakes with my itinerary and classified my ticket as desiring to be on the earlier flight instead of taking the necessary step of calling AA to get me on the standby list. This ended up keeping me from being added to the standby list and delayed me getting home by 6 hours. I am happy to discuss this further with Kayak so they can correct their procedures so this won't happen again.

The flight was fine. It's the satellite terminal that supports American eagle flights is what sucks. There is only one food option and everything there is way overpriced. I mean I know it's airport pricing, but it's even crazier than that. I bought a sandwich in a plastic container for $18.

Overall it was a good flight. Because we traveled on a Saturday we were upgraded to FC since my wife and I are both Executive Platinum. The only areas for improvement we noted are better snack assortment and perhaps a little nicer plane as American is flying some older planes now. Everything else on this flight was excellent, which is frankly not the norm for American since we have had multiple issues on prior AA flights.

The smell from the bathroom kept wafting through the cabin. It made people sick.

The flight was really crowded. Flight attendants were just ok.

Boarding delayed 20 minutes for no reason, no wifi, in flight entertainment, or snacks / waters?

Didn't get a seat assignment until the last minute even though i picked a seat.

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

Information on your arrival and departure airports

St. Louis (STL)