$428 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 6/10. 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 23 - Mon, Mar 9
Multiple Airlines Logo
5:12 am - 10:45 am
STL
-
HEL
21h 33m
1 stop
Multiple Airlines Logo
12:30 pm - 8:55 am
HEL
-
STL
27h 25m
1 stop
$480Multiple Airlines
Mon, Feb 23 - Sun, Mar 8
Lufthansa Logo
6:55 pm - 6:50 pm
STL
-
HEL
15h 55m
2 stops
Lufthansa Logo
6:55 am - 1:55 pm
HEL
-
STL
15h 00m
1 stop
$484Lufthansa
Mon, Feb 23 - Sun, Mar 8
Multiple Airlines Logo
3:47 pm - 5:25 pm
STL
-
HEL
17h 38m
2 stops
Multiple Airlines Logo
7:00 am - 10:58 pm
HEL
-
STL
23h 58m
2 stops
$489Multiple Airlines
Mon, Feb 23 - Mon, Mar 9
United Airlines Logo
6:55 pm - 6:50 pm
STL
-
HEL
15h 55m
2 stops
United Airlines Logo
6:55 am - 11:51 pm
HEL
-
STL
23h 56m
2 stops
$495United Airlines
Mon, Feb 23 - Mon, Mar 9
Multiple Airlines Logo
7:05 am - 1:55 pm
STL
-
HEL
22h 50m
1 stop
Multiple Airlines Logo
7:35 pm - 7:29 pm
HEL
-
STL
30h 54m
2 stops
$499Multiple Airlines
Sat, Apr 11 - Wed, Apr 22
Multiple Airlines Logo
5:57 pm - 4:40 pm
STL
-
HEL
14h 43m
2 stops
Multiple Airlines Logo
7:00 am - 4:42 pm
HEL
-
STL
17h 42m
2 stops
$547Multiple Airlines
Sat, Apr 11 - Wed, Apr 22
Multiple Airlines Logo
4:05 pm - 1:05 pm
STL
-
HEL
37h 00m
2 stops
Multiple Airlines Logo
6:35 am - 1:25 pm
HEL
-
STL
14h 50m
1 stop
$561Multiple Airlines
Sat, Apr 11 - Wed, Apr 22
American Airlines Logo
2:29 pm - 2:15 pm
STL
-
HEL
15h 46m
1 stop
American Airlines Logo
4:25 pm - 11:48 pm
HEL
-
STL
15h 23m
1 stop
$573American Airlines
Sat, Apr 11 - Wed, Apr 22
American Airlines Logo
12:11 pm - 2:15 pm
STL
-
HEL
18h 04m
1 stop
American Airlines Logo
12:35 pm - 10:14 pm
HEL
-
STL
17h 39m
2 stops
$578American Airlines
Fri, Feb 6 - Tue, Feb 10
United Airlines Logo
6:30 am - 1:05 pm
STL
-
HEL
22h 35m
2 stops
United Airlines Logo
7:05 am - 3:29 pm
HEL
-
STL
40h 24m
2 stops
$709United 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 American Airlines ($480) and Lufthansa ($484).

Good to know

Low seasonFebruary
Cheapest flight$428
Best time to beat the crowds with an average 39% 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 11197 reviews
6.9Entertainment
6.4Food
7.5Boarding
7.2Comfort
8.0Crew
Airline reviews

On time on a day with lots of weather cancellations on other flights. Thank you for getting me home during a winter storm!

10.0 ExcellentCindy, Jan 2026
MIA - BHM
Read more American Airlines reviews

On time on a day with lots of weather cancellations on other flights. Thank you for getting me home during a winter storm!

Don't change gate multiple times make people run across the airport. Announce delays in a timely manner. Have maintenance crew ready. Don't delay and keep passengers on the plane for 3 hrs. on tarmac.

The plane was experiencing problems with the HVAC system, it was very cold in the front of the plane and very hot in the back.

My flight to London from Philadelphia was cancelled due to weather.

The attendants were kind and helpful. A sugar-free drink would have been very welcome.

Pilot navigated severe weather/snow storm with skill. Described his intentions clearly

one crew said "he" didn't serve double alcohol drinks for travelers in exit rows. crew on prior flight did. Is this a AA rule, and the prior crew was being nice? Also, I think we deserve more than a 25% refund for losing first class seats when rescheduling a flight due to weather

It was a little concerning to hear the ground crew arguing with the flight crew over baggage space. Instead of taking them and checking them, they started checking for space in the first class cabin moving items around like the flight crew didn't know what they were doing. I was embarrassed for them.

2 hour delay due to equipment failure. No updates via the app and airport screens (which continued to show a departure time in the past). AA eventually switched planes and the new plane was not catered or cleaned correctly.

I booked an aisle seat and was given a middle. At 6'4" 230lbs, it is not ideal to fly in the middle row for myself and passengers.

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

Information on your arrival and departure airports