$497 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 2/6. 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

Fri, Feb 6 - Tue, Feb 10
Delta Logo
3:31 pm - 5:25 pmSTL-HEL
17h 54m2 stops
Delta Logo
6:30 am - 11:25 pmHEL-STL
24h 55m2 stops
$497Delta
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Fri, Feb 6 - Tue, Feb 10
American Airlines Logo
5:50 am - 10:45 amSTL-HEL
20h 55m1 stop
American Airlines Logo
12:30 pm - 7:29 pmHEL-STL
14h 59m1 stop
$658American Airlines
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Fri, Feb 6 - Tue, Feb 10
American Airlines Logo
1:35 pm - 1:55 pmSTL-HEL
16h 20m2 stops
American Airlines Logo
12:30 pm - 10:59 pmHEL-STL
18h 29m1 stop
$662American Airlines
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Wed, Dec 24 - Wed, Dec 31
United Airlines Logo
8:15 am - 6:50 pmSTL-HEL
26h 35m2 stops
United Airlines Logo
12:45 pm - 9:55 pmHEL-STL
41h 10m2 stops
$1,703United Airlines
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Wed, Dec 24 - Wed, Dec 31
United Airlines Logo
9:00 am - 6:50 pmSTL-HEL
25h 50m2 stops
United Airlines Logo
12:45 pm - 10:43 pmHEL-STL
17h 58m2 stops
$1,744United Airlines
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Wed, Dec 24 - Wed, Dec 31
United Airlines Logo
3:50 pm - 4:30 pmSTL-HEL
16h 40m1 stop
United Airlines Logo
12:45 pm - 10:43 pmHEL-STL
17h 58m2 stops
$1,850United Airlines
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Fri, Dec 19 - Mon, Jan 5
United Airlines Logo
4:05 pm - 1:05 pmSTL-HEL
37h 00m2 stops
United Airlines Logo
1:55 pm - 10:13 amHEL-STL
52h 18m2 stops
$2,298United Airlines
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Fri, Dec 19 - Mon, Jan 5
Lufthansa Logo
3:50 pm - 4:50 pmSTL-HEL
17h 00m1 stop
Lufthansa Logo
5:45 pm - 11:59 pmHEL-STL
38h 14m2 stops
$2,390Lufthansa
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Fri, Dec 19 - Mon, Jan 5
Multiple Airlines Logo
3:50 pm - 1:35 amSTL-HEL
25h 45m3 stops
Multiple Airlines Logo
2:00 pm - 3:29 pmHEL-STL
33h 29m2 stops
$2,470Multiple Airlines
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Fri, Dec 19 - Mon, Jan 5
Multiple Airlines Logo
3:50 pm - 1:35 amSTL-HEL
25h 45m3 stops
Multiple Airlines Logo
1:55 pm - 10:56 amHEL-STL
29h 01m3 stops
$2,511Multiple 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 April, when tickets cost $668 (return) on average. On the other hand, the most expensive months are May and June, when the average cost of round-trip tickets is $1,481 and $1,228 respectively.

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Good to know

Low seasonOctober
Cheapest flight$497
Best time to beat the crowds with an average 32% drop in price.
Most popular time to fly and prices are also 19% 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
7.2Comfort
7.5Boarding
8.0Crew
6.9Entertainment
6.4Food
Airline reviews

The flight was delayed multiple times, again no fault of American but again the extra cost, for everything makes it feel like a cheap airline! Especially when flights are outrageously expensive already

6.0 GoodDonald, Nov 2025DFW - MSY
Read more American Airlines reviews

The flight was delayed multiple times, again no fault of American but again the extra cost, for everything makes it feel like a cheap airline! Especially when flights are outrageously expensive already

Horrible. Both legs of my flight were delayed more than 6 hours. No compensation, no screens on the plane, and the plane was not clean.

I had a positive experience on American. I'm blind and traveling with a guide dog and the flight attendants were so kind, friendly, and helpful towards us. They checked in on us during the flight and they made us feel comfortable and welcomed. There was an hour delay before depature, but overall the flight was a smooth ride. I appreciate that there were no issues on this long flight back home.

We were told the flight was delayed 5 times, then it was moved to the next day.

More choices on snacks. Built-in video screen to enjoy entertainment choices.

we landed at cmh ten minutes early but had to sit on tarmac for twenty minutes because a plane was at our gate despite the fact that 3 other gates were open.

The experience with American Airlines was good, although the Philippines Airlines flight was much better (better seats, better food, better entertainment options, overall better). Again, the MIA to LAX flight was fine, but nothing in comparison to the comfort and accommodations of the Philippines Airlines flight from LAX to MNL.

I have a gluten allergy so did have any food

I have a gluten allergy so didn't have any food

Loved the crew . Absolutely no complaints. Except for luggage lost

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

Information on your arrival and departure airports

St. Louis (STL)