$444 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 11/29. 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

Tue, Dec 9 - Tue, Dec 23
Multiple Airlines Logo
6:30 am - 1:10 pmSTL-HEL
22h 40m2 stops
Multiple Airlines Logo
7:35 pm - 4:27 pmHEL-STL
52h 52m2 stops
$517Multiple Airlines
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Fri, Mar 27 - Tue, Mar 31
American Airlines Logo
5:28 am - 10:45 amSTL-HEL
22h 17m1 stop
American Airlines Logo
12:35 pm - 10:24 pmHEL-STL
17h 49m1 stop
$532American Airlines
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Fri, Mar 27 - Tue, Mar 31
American Airlines Logo
2:36 pm - 1:55 pmSTL-HEL
16h 19m2 stops
American Airlines Logo
12:35 pm - 9:48 pmHEL-STL
17h 13m2 stops
$536American Airlines
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Fri, Mar 27 - Tue, Mar 31
Lufthansa Logo
4:50 pm - 1:05 pmSTL-HEL
13h 15m1 stop
Lufthansa Logo
7:05 am - 7:48 pmHEL-STL
20h 43m2 stops
$553Lufthansa
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Fri, Mar 27 - Tue, Mar 31
Lufthansa Logo
4:50 pm - 1:05 pmSTL-HEL
13h 15m1 stop
Lufthansa Logo
1:50 pm - 1:30 pmHEL-STL
31h 40m1 stop
$563Lufthansa
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Fri, Mar 27 - Tue, Mar 31
Lufthansa Logo
4:50 pm - 1:05 pmSTL-HEL
13h 15m1 stop
Lufthansa Logo
6:15 pm - 1:30 pmHEL-STL
27h 15m1 stop
$564Lufthansa
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Tue, Dec 9 - Tue, Dec 23
Multiple Airlines Logo
11:25 am - 1:10 pmSTL-HEL
17h 45m2 stops
Multiple Airlines Logo
1:55 pm - 1:55 pmHEL-STL
32h 00m1 stop
$615Multiple Airlines
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Fri, Mar 27 - Tue, Mar 31
United Airlines Logo
4:50 pm - 6:50 pmSTL-HEL
19h 00m2 stops
United Airlines Logo
7:05 am - 7:25 pmHEL-STL
20h 20m2 stops
$713United Airlines
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Fri, Mar 27 - Tue, Mar 31
Air Canada Logo
4:05 pm - 6:50 pmSTL-HEL
19h 45m2 stops
Air Canada Logo
1:50 pm - 3:24 pmHEL-STL
33h 34m2 stops
$952Air Canada
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Fri, Mar 27 - Tue, Mar 31
United Airlines Logo
4:50 pm - 4:50 pmSTL-HEL
17h 00m1 stop
United Airlines Logo
1:50 pm - 3:24 pmHEL-STL
33h 34m2 stops
$957United Airlines
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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.

What is the cheapest month to fly from St. Louis to Finland?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from St. Louis to Finland, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from St. Louis to Finland is November, when tickets cost $507 (return) on average. On the other hand, the most expensive months are June and September, when the average cost of round-trip tickets is $1,228 and $1,161 respectively.

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Good to know

Low seasonOctober
Cheapest flight$444
Best time to beat the crowds with an average 28% drop in price.
Most popular time to fly and prices are also 14% lower on average.
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.

  • What is the cheapest time of day to fly to Finland?

    The cheapest time of day to fly to Finland is generally in the morning, when round-trip flights cost $706 on average. Morning departures are around 46% cheaper than evening flights, on average. The most expensive time of day to fly to Finland is generally in the afternoon, which is peak travel time and where the average cost of a ticket is $1,476.

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 11042 reviews
6.4Food
8.0Crew
7.2Comfort
6.9Entertainment
7.5Boarding
Airline reviews

We loved the steward on the plane. He made the night enjoyable

10.0 Excellentchloe, Nov 2025ORD - ATW
Read more American Airlines reviews

We loved the steward on the plane. He made the night enjoyable

I enjoyed the extra leg room compared to other airlines. The first stewards made my daughter’s birthday special by giving her an extra snack. Then the last one coming home from Chicago to Appleton made our night really enjoyable Thanks for making our trip enjoyable

The flight was smooth, the pilot kept us informed about delays and we arrived more of less on time

Flight delay was communicated before leaving for airport which caused it to be a non-event. Great flight and crew!

Did not get any refreshments. Crew was very nice but limited. Small seats

Wish some foods provided rather than just biscuit/cookie for flight more than 2 hours

Wish a flight with more than 2 hours with some snack rather than just cookie/biscuit.

The flight attendant, a black woman with curly hair who sat near Row 21, was wonderful and kind.

It was good..clean, comfy seat. Friendly warm welcoming crew. Was able to check my cabin luggage at the gate which I was able to pickup in a decent time from baggage claim. The app gave all updates from delays to baggage claim info. Overall smooth flight.

Flight was delayed leaving Dallas. Arrived about 2 hours later than scheduled.

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

Information on your arrival and departure airports

St. Louis (STL)