$378 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 5/15. 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, Feb 2 - Tue, Feb 17
Multiple Airlines Logo
11:55 am - 11:00 pm
STL
-
HEL
27h 05m
2 stops
Multiple Airlines Logo
12:30 pm - 7:29 pm
HEL
-
STL
14h 59m
1 stop
$421Multiple Airlines
Mon, Mar 30 - Mon, Apr 6
Finnair Logo
11:46 am - 9:00 pm
STL
-
HEL
25h 14m
2 stops
Finnair Logo
4:25 pm - 9:11 pm
HEL
-
STL
12h 46m
1 stop
$480Finnair
Mon, Mar 30 - Mon, Apr 6
Finnair Logo
11:46 am - 10:45 am
STL
-
HEL
14h 59m
1 stop
Finnair Logo
4:25 pm - 9:11 pm
HEL
-
STL
12h 46m
1 stop
$484Finnair
Mon, Feb 2 - Tue, Feb 17
Multiple Airlines Logo
7:00 am - 1:55 pm
STL
-
HEL
22h 55m
1 stop
Multiple Airlines Logo
12:30 pm - 7:29 pm
HEL
-
STL
14h 59m
1 stop
$552Multiple Airlines
Mon, May 18 - Mon, May 25
British Airways Logo
12:11 pm - 9:00 pm
STL
-
HEL
24h 49m
2 stops
British Airways Logo
7:30 pm - 8:26 pm
HEL
-
STL
32h 56m
2 stops
$650British Airways
Sat, Mar 14 - Sun, Mar 22
Lufthansa Logo
7:00 pm - 4:40 pm
STL
-
HEL
38h 40m
2 stops
Lufthansa Logo
7:35 pm - 11:51 pm
HEL
-
STL
35h 16m
2 stops
$710Lufthansa
Sat, Mar 14 - Sun, Mar 22
British Airways Logo
6:57 pm - 3:15 pm
STL
-
HEL
37h 18m
2 stops
British Airways Logo
12:30 pm - 10:58 pm
HEL
-
STL
17h 28m
1 stop
$728British Airways
Sun, May 17 - Sun, May 24
Multiple Airlines Logo
1:00 pm - 1:10 pm
STL
-
HEL
40h 10m
2 stops
Multiple Airlines Logo
6:45 am - 1:25 pm
HEL
-
STL
14h 40m
1 stop
$753Multiple Airlines
Mon, May 18 - Sun, May 24
United Airlines Logo
7:30 am - 1:10 pm
STL
-
HEL
21h 40m
2 stops
United Airlines Logo
6:45 am - 1:25 pm
HEL
-
STL
14h 40m
1 stop
$758United Airlines
Sun, May 17 - Mon, May 25
Air Canada Logo
1:00 pm - 1:10 pm
STL
-
HEL
40h 10m
2 stops
Air Canada Logo
6:00 am - 8:05 pm
HEL
-
STL
46h 05m
2 stops
$777Air Canada
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 Lufthansa ($480) and Finnair ($480).

Find deals

Good to know

Low seasonFebruary
Cheapest flight$378
Best time to beat the crowds with an average 38% drop in price.
Most popular time to fly with an average 25% 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 11153 reviews
7.2Comfort
6.9Entertainment
7.5Boarding
6.4Food
8.0Crew
Airline reviews

The seat cushions were very worn so they were extremely uncomfortable.

4.0 OkayLouesa, Jan 2026
DFW - PHL
Read more American Airlines reviews

The seat cushions were very worn so they were extremely uncomfortable.

Delayed, no updates, had a rewards number but was not working

The seats from lax to DFW was so tight that I could not move my legs . No WiFi and had to pay . Not a good selection of entertainment

AA should improve their in air internet & entertainment options. Seems unreasonable to charge $20/hr and should have some form of free connections. The entertainment options are also pretty limited, movies are outdated and the series only show 3-5 episodes.

The professionals have excellent customer service, the seats don´t have enough space.

We were upgraded to First Class and it was a great flight

Amazing I love American. I’ll never fly anyone else if I can help it.

I love American. I’ll never fly anyone else if I can help it.

Flight delay and multiple gate changes including a change near boarding time to another terminal, which in DFW is a pain. Pre-boarding delay and also a further delay on the ground after boarding. About an hour and a half total delay.

On the plus side, crew was attentive, drinks were cold, and in-flight entertainment selection was better than some other airlines. On the negative aide, Plane was delayed almost an hour, either no announcements from the gate crew. Biscoff cookies are gross, appreciate airlines that give a choice. Also, crew had no personality or enthusiasm at all.

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

Information on your arrival and departure airports

St. Louis (STL)