$481 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 12/9. 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

Tue, Dec 9 - Tue, Dec 16
Delta Logo
6:05 pm - 4:25 pmSTL-HEL
14h 20m2 stops
Delta Logo
6:30 am - 10:45 amHEL-STL
36h 15m2 stops
$481Delta
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Mon, Jan 12 - Mon, Jan 19
Multiple Airlines Logo
11:55 am - 10:45 amSTL-HEL
14h 50m1 stop
Multiple Airlines Logo
12:30 pm - 7:29 pmHEL-STL
14h 59m1 stop
$483Multiple Airlines
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Mon, Jan 12 - Mon, Jan 19
American Airlines Logo
2:54 pm - 1:55 pmSTL-HEL
15h 01m2 stops
American Airlines Logo
12:30 pm - 7:29 pmHEL-STL
14h 59m1 stop
$487American Airlines
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Tue, Dec 9 - Mon, Dec 15
Delta Logo
2:38 pm - 4:25 pmSTL-HEL
17h 47m2 stops
Delta Logo
6:30 am - 9:50 amHEL-STL
35h 20m2 stops
$491Delta
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Tue, Dec 9 - Thu, Dec 18
Delta Logo
9:50 am - 4:25 pmSTL-HEL
22h 35m2 stops
Delta Logo
6:30 am - 9:57 pmHEL-STL
23h 27m2 stops
$591Delta
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Tue, Dec 9 - Wed, Dec 17
Delta Logo
12:49 pm - 4:25 pmSTL-HEL
19h 36m2 stops
Delta Logo
6:30 am - 4:49 pmHEL-STL
18h 19m2 stops
$653Delta
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Mon, Jan 12 - Mon, Jan 19
Multiple Airlines Logo
9:57 am - 1:10 pmSTL-HEL
19h 13m3 stops
Multiple Airlines Logo
6:55 am - 3:29 pmHEL-STL
40h 34m2 stops
$700Multiple Airlines
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Tue, Dec 9 - Tue, Dec 16
Multiple Airlines Logo
7:00 am - 10:45 amSTL-HEL
19h 45m1 stop
Multiple Airlines Logo
4:50 pm - 10:25 amHEL-STL
25h 35m1 stop
$713Multiple Airlines
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Tue, Dec 9 - Tue, Dec 16
Multiple Airlines Logo
1:20 pm - 10:45 amSTL-HEL
13h 25m1 stop
Multiple Airlines Logo
7:35 am - 8:38 pmHEL-STL
21h 03m2 stops
$755Multiple Airlines
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Wed, Dec 10 - Mon, Dec 15
United Airlines Logo
6:42 pm - 6:50 pmSTL-HEL
16h 08m2 stops
United Airlines Logo
6:55 am - 12:15 pmHEL-STL
37h 20m2 stops
$773United 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$481
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 11050 reviews
7.2Comfort
6.9Entertainment
7.5Boarding
6.4Food
8.0Crew
Airline reviews

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.

6.0 GoodAnonymous, Nov 2025DFW - CMH
Read more American Airlines reviews

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 was good The connects, with no blame to crew. Or pilots. I understand they are short staffed. Everything went well for me. I'll be using you guys again in May if not sooner.

this plane was really old, had exit row seats and tray was in arm of seat so super uncomfortable to use. another seat they could t even use the tray it was broke. seat i. front of me had duct tape on it cause seat was ripped open... this plane should either be updated or retired.

We were very rushed by a staff member at the gate when transferring from American Airlines to Fijian. Then the plane stayed put for ages anyhow! The plane was delayed and my bag sent to San Francisco instead of Fiji

Baggage handling poor. Second time this has happened. My bag went to San Francisco instead of Fiji. No apology. Luckily Nadi airport staff are fantastic. My bag arrived in Fiji the next day.

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

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

Information on your arrival and departure airports

St. Louis (STL)