$484 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 3/9. 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 9 - Wed, Mar 18
American Airlines Logo
11:22 am - 11:10 am
STL
-
HEL
16h 48m
1 stop
American Airlines Logo
12:45 pm - 11:58 pm
HEL
-
STL
18h 13m
1 stop
$484American Airlines
Mon, Mar 9 - Tue, Mar 17
Multiple Airlines Logo
7:00 pm - 6:50 pm
STL
-
HEL
16h 50m
2 stops
Multiple Airlines Logo
1:55 pm - 3:29 pm
HEL
-
STL
32h 34m
2 stops
$488Multiple Airlines
Mon, Mar 9 - Wed, Mar 18
United Airlines Logo
7:00 pm - 6:50 pm
STL
-
HEL
16h 50m
2 stops
United Airlines Logo
6:55 am - 2:55 pm
HEL
-
STL
15h 00m
1 stop
$489United Airlines
Mon, Mar 9 - Mon, Mar 16
United Airlines Logo
7:00 pm - 6:50 pm
STL
-
HEL
16h 50m
2 stops
United Airlines Logo
1:55 pm - 3:29 pm
HEL
-
STL
32h 34m
2 stops
$497United Airlines
Mon, Mar 9 - Tue, Mar 17
United Airlines Logo
7:00 pm - 6:50 pm
STL
-
HEL
16h 50m
2 stops
United Airlines Logo
1:55 pm - 2:55 pm
HEL
-
STL
32h 00m
1 stop
$509United 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 - 2:30 pm
HEL
-
STL
39h 25m
2 stops
$561United Airlines
Mon, Mar 9 - Thu, Mar 19
United Airlines Logo
7:00 pm - 6:50 pm
STL
-
HEL
16h 50m
2 stops
United Airlines Logo
6:55 am - 5:59 pm
HEL
-
STL
18h 04m
2 stops
$589United Airlines
Mon, Mar 9 - Tue, Mar 17
Finnair Logo
11:46 am - 10:45 am
STL
-
HEL
15h 59m
1 stop
Finnair Logo
12:30 pm - 7:29 pm
HEL
-
STL
13h 59m
1 stop
$694Finnair
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
Fri, Feb 6 - Tue, Feb 10
United Airlines Logo
8:05 am - 1:05 pm
STL
-
HEL
21h 00m
2 stops
United Airlines Logo
7:05 am - 7:27 pm
HEL
-
STL
20h 22m
2 stops
$711United 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 13h 15m.

Good to know

Low seasonFebruary
Cheapest flight$447
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
7.2Comfort
6.9Entertainment
6.4Food
7.5Boarding
8.0Crew
Airline reviews

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

8.0 ExcellentAnonymous, Jan 2026
PHX - CMH
Read more American Airlines reviews

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.

Trip delayed for 2 hours because of rain. We boarded and have to get down the flight and reboard again.

The aircraft had several problems - from excess fuel to non operational ac. Two hours of delay in Chicago could have been avoided with proper planning and aircraft maintenance.

This flight captain and crew were amazing, started ahead of time of departure and reached 30 mins before arrival time. Amazing!

Long delays, lack of information about the status of the flight. The flight was delayed 4 times.

Could we please end the loud announcements about credit card offers on your flights? We are trying to sleep, work, watch videos, etc. and if we need a credit card, we will ask for one. Flying is already not what it used to be.

I would like the crew to talk LESS over the PA and specifically about credit card offers. I am trying to work, sleep, watch a movie and the PA was booming about a credit card offer. Could we go back to the days when the customer was more important than selling a credit card?

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

Information on your arrival and departure airports