$475 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 3/29. 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

Sun, Mar 29 - Tue, Apr 14
Multiple Airlines Logo
8:00 am - 2:15 pm
STL
-
HEL
22h 15m
1 stop
Multiple Airlines Logo
12:35 pm - 11:46 pm
HEL
-
STL
19h 11m
2 stops
$475Multiple Airlines
Wed, Apr 1 - Wed, Apr 8
American Airlines Logo
9:37 am - 2:15 pm
STL
-
HEL
20h 38m
1 stop
American Airlines Logo
4:25 pm - 11:46 pm
HEL
-
STL
15h 21m
1 stop
$484American Airlines
Wed, Apr 1 - Wed, Apr 8
American Airlines Logo
1:39 pm - 2:00 pm
STL
-
HEL
16h 21m
2 stops
American Airlines Logo
4:25 pm - 10:17 pm
HEL
-
STL
13h 52m
1 stop
$489American Airlines
Wed, Apr 1 - Wed, Apr 8
United Airlines Logo
8:21 am - 6:55 pm
STL
-
HEL
26h 34m
2 stops
United Airlines Logo
6:35 am - 9:08 pm
HEL
-
STL
22h 33m
2 stops
$500United Airlines
Sun, Mar 29 - Tue, Apr 14
Lufthansa Logo
6:35 pm - 1:35 am
STL
-
HEL
23h 00m
2 stops
Lufthansa Logo
7:40 pm - 9:08 pm
HEL
-
STL
33h 28m
2 stops
$523Lufthansa
Tue, Mar 3 - Tue, Mar 10
Lufthansa Logo
4:49 pm - 6:50 pm
STL
-
HEL
18h 01m
2 stops
Lufthansa Logo
7:05 am - 11:51 pm
HEL
-
STL
23h 46m
2 stops
$687Lufthansa
Tue, Mar 3 - Tue, Mar 10
American Airlines Logo
2:06 pm - 1:55 pm
STL
-
HEL
15h 49m
2 stops
American Airlines Logo
12:30 pm - 11:22 pm
HEL
-
STL
17h 52m
1 stop
$689American Airlines
Tue, Mar 3 - Tue, Mar 10
American Airlines Logo
11:59 am - 1:55 pm
STL
-
HEL
17h 56m
2 stops
American Airlines Logo
12:30 pm - 11:44 pm
HEL
-
STL
18h 14m
2 stops
$694American Airlines
Tue, Mar 3 - Tue, Mar 10
American Airlines Logo
5:12 am - 10:45 am
STL
-
HEL
21h 33m
1 stop
American Airlines Logo
12:30 pm - 11:22 pm
HEL
-
STL
17h 52m
1 stop
$701American Airlines
Sun, Mar 29 - Tue, Apr 14
Scandinavian Airlines Logo
12:04 pm - 1:30 am
STL
-
HEL
29h 26m
2 stops
Scandinavian Airlines Logo
7:15 am - 11:34 pm
HEL
-
STL
24h 19m
3 stops
$758Scandinavian 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 United Airlines ($500) and Lufthansa ($523).

Good to know

Low seasonFebruary
Cheapest flight$475
Best time to beat the crowds with an average 36% drop in price.
Most popular time to fly with an average 30% 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 11246 reviews
7.5Boarding
6.4Food
6.9Entertainment
8.0Crew
7.2Comfort
Airline reviews

This was a horrible experience. I’ve experienced several delays at this point and still not home. I was supposed to be home by 8:30 last night and here I sit at 7 am on a plane STILL unable to go home because of American Airlines.

2.0 MediocreRachel, Feb 2026
MEM - CLT
Read more American Airlines reviews

This was a horrible experience. I’ve experienced several delays at this point and still not home. I was supposed to be home by 8:30 last night and here I sit at 7 am on a plane STILL unable to go home because of American Airlines.

Lexus in first class was absolutely amazing! Beat flight attendant i’ve ever seen.

Generally good. Flight left on time and the seats are comfortable. Plenty of space in front if you in you choose a comfort plus seat, completely worth spending the extra money given the amount of hours the flight lasts. The food tastes good but I would say it’s a the amount is too little. The crew was friendly and efficient. There was a some turbulence at different points into the flight. American Airlines has good deals to NZ if you book with plenty of time before you plan on going.

the plane was so hot!! the air-conditioning was barely blowing. The flight was delayed, and we had to sit on the hot plane before take off for an extended amount of time, waiting on international passengers. Would not have been so bad if it was not so hot. They said it would get better after take off, but it did not.

They are always late and seats was also not having working charger

We flew in first class. The crew did not offer drinks before the flight took off, but they treated us well during the flight. The food was excellent. There was actually too much food served, but it was nice to have all the options.

did not have enough meal for first class passengers so offer us snack

Arrived 40 min early which was great - sat in runway for 35 min so no gain. Then waited for luggage 45 min. They need to staff accordingly knowing its one of the busiest week in Phx

Broke my luggage and I can't get a resolution yet.

My flight got rerouted due to crew rest. I was sent to Dallas customer service was not very polite. Was given a $40 room voucher for Motel 6 and $12 to eat with. It delayed me by a day. Where if I would have just stuck with my original flight Arizona was delayed to Cleveland and I could have made it home. They put me on a 9:00 flight out of Dallas to Cleveland without my knowledge or consent. When originally I was told it would be 8:45 a.m. on February 1st. I told them I could not take the 9:00 flight because I did not have anybody to pick me up from the airport at that time. I'm extremely disappointed in how I was treated. And I will not fly American Airlines again.

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

Information on your arrival and departure airports