$686 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 6/26. 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, Sep 14 - Fri, Sep 18
Multiple Airlines Logo
9:58 am - 2:00 pm
STL
-
HEL
20h 02m
1 stop
Multiple Airlines Logo
4:25 pm - 8:44 pm
HEL
-
STL
12h 19m
1 stop
$780Multiple Airlines
Mon, Sep 14 - Fri, Sep 18
Lufthansa Logo
12:59 pm - 12:05 pm
STL
-
HEL
15h 06m
2 stops
Lufthansa Logo
6:55 am - 9:36 pm
HEL
-
STL
22h 41m
2 stops
$783Lufthansa
Mon, Sep 14 - Fri, Sep 18
American Airlines Logo
11:01 am - 2:00 pm
STL
-
HEL
18h 59m
2 stops
American Airlines Logo
4:25 pm - 12:27 am
HEL
-
STL
16h 02m
1 stop
$784American Airlines
Sun, Jul 12 - Wed, Jul 22
Delta Logo
6:09 pm - 4:40 pm
STL
-
HEL
14h 31m
2 stops
Delta Logo
7:00 am - 3:13 pm
HEL
-
STL
16h 13m
2 stops
$945Delta
Sun, Jul 12 - Wed, Jul 22
United Airlines Logo
6:00 am - 12:30 am
STL
-
HEL
34h 30m
2 stops
United Airlines Logo
6:35 am - 1:25 pm
HEL
-
STL
14h 50m
1 stop
$953United Airlines
Sun, Jul 12 - Wed, Jul 22
Lufthansa Logo
3:30 pm - 1:05 pm
STL
-
HEL
13h 35m
1 stop
Lufthansa Logo
6:35 am - 1:25 pm
HEL
-
STL
14h 50m
1 stop
$981Lufthansa
Thu, Jul 23 - Thu, Aug 6
Lufthansa Logo
1:13 pm - 12:05 pm
STL
-
HEL
14h 52m
2 stops
Lufthansa Logo
6:35 am - 11:29 pm
HEL
-
STL
24h 54m
2 stops
$998Lufthansa
Mon, Jul 13 - Sun, Jul 26
Lufthansa Logo
7:05 pm - 1:35 am
STL
-
HEL
22h 30m
2 stops
Lufthansa Logo
6:45 am - 1:25 pm
HEL
-
STL
14h 40m
1 stop
$1,008Lufthansa
Thu, Jul 23 - Thu, Aug 6
Delta Logo
6:58 pm - 5:40 pm
STL
-
HEL
14h 42m
2 stops
Delta Logo
1:55 pm - 11:58 pm
HEL
-
STL
18h 03m
2 stops
$1,011Delta
Wed, Jul 1 - Wed, Jul 15
Lufthansa Logo
3:30 pm - 6:55 pm
STL
-
HEL
19h 25m
2 stops
Lufthansa Logo
6:35 am - 1:25 pm
HEL
-
STL
14h 50m
1 stop
$1,013Lufthansa
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 7 days.

In the past 7 days, the cheapest round-trip tickets from St. Louis to Finland were found on Delta ($945) and United Airlines ($953).

Find deals

Good to know

Low seasonFebruary
Cheapest flight$686
Best time to beat the crowds with an average 32% drop in price.
Most popular time to fly with an average 35% 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.
7.1
American AirlinesOverall score based on 11639 reviews
6.9Entertainment
6.4Food
7.5Boarding
7.2Comfort
7.9Crew
Airline reviews

Movies on my phone are great. It would be nice to have a gluten free snack option.

10.0 ExcellentJolene, May 2026
DFW - FLG
Read more American Airlines reviews

Movies on my phone are great. It would be nice to have a gluten free snack option.

It was what i expected. I like the movies you can access from your phone. It would be nice if there was a gluten free snack offered. But I did bring my own snack knowing there would not be a gluten free option

The flight was peaceful, just s slight turbulence, pilots and crews were all nice and made a great job! Arrived safely in the Philippines. Thank you ya’ll!

Ontario airport boarding was very easy to park and access, is clean and TSA took 10 minutes total. Check-in was a breeze and cruise was very nice.

American Airlines II: Delay Boogaloo. Multiple gate changes, delays, boarded and then MORE delays. I hate to say this won’t matter, but posting stuff about major corporations in 2026 is a post-modern “scream into the void.” Was multiple hours late coming home, so there you go.

Awful, tons of delays, I got into Chicago multiple hours late meaning I hit the very traffic I tried so desperately to avoid. Just empty apologies from American Airlines text alerts. Trash behavior from a trash airline.

The flight attendants were very friendly, efficient, and helpful. The plane was ahead of schedule, and it all went very smoothly. Thank you.

They lost my baggage and I am still struggling to the information and update

We got delayed getting out of DFW for broken overhead bins. Once the flight got underway the captain kept the seatbelt sign lit the entire flight despite little perceptible turbulence, preventing use of the rest rooms and any sort of refreshment service in the main cabin.

Flight delays for communication overall not a good experience uncomfortable on the plane. Person in front of me reclined his seat, putting them inches from my lap.

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

Information on your arrival and departure airports

St. Louis (STL)