$395 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 8/21. 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, Oct 20 - Tue, Nov 10
Multiple Airlines Logo
12:43 pm - 10:45 am
STL
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HEL
14h 02m
1 stop
Multiple Airlines Logo
12:30 pm - 10:29 pm
HEL
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STL
17h 59m
1 stop
$727Multiple Airlines
Tue, Oct 20 - Tue, Nov 10
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12:10 pm - 6:55 pm
STL
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HEL
22h 45m
2 stops
Multiple Airlines Logo
5:20 pm - 1:55 pm
HEL
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STL
28h 35m
1 stop
$729Multiple Airlines
Tue, Oct 20 - Tue, Nov 10
Multiple Airlines Logo
12:10 pm - 6:55 pm
STL
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HEL
22h 45m
2 stops
Multiple Airlines Logo
7:35 pm - 1:55 pm
HEL
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STL
26h 20m
2 stops
$738Multiple Airlines
Wed, May 27 - Wed, Jun 3
Multiple Airlines Logo
1:05 pm - 6:55 pm
STL
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HEL
21h 50m
2 stops
Multiple Airlines Logo
6:35 am - 1:25 pm
HEL
-
STL
14h 50m
1 stop
$882Multiple Airlines
Wed, May 27 - Wed, Jun 3
Multiple Airlines Logo
1:19 pm - 10:45 am
STL
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HEL
13h 26m
1 stop
Multiple Airlines Logo
12:35 pm - 11:59 pm
HEL
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STL
19h 24m
1 stop
$893Multiple Airlines
Tue, May 26 - Tue, Jun 2
Multiple Airlines Logo
1:05 pm - 6:55 pm
STL
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HEL
21h 50m
2 stops
Multiple Airlines Logo
7:05 am - 1:25 pm
HEL
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STL
14h 20m
1 stop
$898Multiple Airlines
Wed, May 27 - Thu, Jun 4
Air Canada Logo
1:05 pm - 6:55 pm
STL
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HEL
21h 50m
2 stops
Air Canada Logo
6:35 am - 8:25 pm
HEL
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STL
21h 50m
2 stops
$901Air Canada
Tue, May 26 - Wed, Jun 3
Air Canada Logo
7:05 am - 6:55 pm
STL
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HEL
27h 50m
2 stops
Air Canada Logo
6:35 am - 8:25 pm
HEL
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STL
21h 50m
2 stops
$906Air Canada
Wed, May 27 - Wed, Jun 3
Multiple Airlines Logo
1:05 pm - 6:55 pm
STL
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HEL
21h 50m
2 stops
Multiple Airlines Logo
6:35 am - 3:46 pm
HEL
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STL
17h 11m
2 stops
$908Multiple Airlines
Wed, May 27 - Wed, Jun 3
United Airlines Logo
12:23 pm - 6:55 pm
STL
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HEL
22h 32m
2 stops
United Airlines Logo
6:35 am - 3:46 pm
HEL
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STL
41h 11m
3 stops
$909United 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.

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 January, when tickets cost $0 (return) on average. On the other hand, the most expensive months are June and March, when the average cost of round-trip tickets is $1,068 and $791 respectively.

Good to know

Low seasonFebruary
Cheapest flight$395
Best time to beat the crowds with an average 30% drop in price.
Most popular time to fly with an average 40% 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 airlines 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.
7.6
FinnairOverall score based on 1392 reviews
8.2Crew
6.9Entertainment
7.4Comfort
6.7Food
7.7Boarding
Airline reviews

Rude Iberia security crew at the Madrid terminal. No Iberia officials to be found to redress complaints at the gate. No supervisors. Nothing for processing upgrades at the gate Iberia app did not work to let me upgrade my options to higher classes. No water was offered on a hot day in Madrid. Madrid airport air conditioning was so weak that people were sweating. Never book on any airlines that codeshare with Iberia.

2.0 MediocreShiva, Apr 2026
MAD - EWR
Read more Finnair reviews

Rude Iberia security crew at the Madrid terminal. No Iberia officials to be found to redress complaints at the gate. No supervisors. Nothing for processing upgrades at the gate Iberia app did not work to let me upgrade my options to higher classes. No water was offered on a hot day in Madrid. Madrid airport air conditioning was so weak that people were sweating. Never book on any airlines that codeshare with Iberia.

Comfort. Not good very little space after the person in front of you lay back.

On a more than 8 hours flight was only one meal included, which I have never experienced before. Always two meals on the overseas flight. It was very weird.

Positive: It was refreshingly easy and polite check-in and boarding staff. Flight was on time and Helsinki is a very well-signposted airport. Shopping was nice as well. Flight was not full and I had lots of space in economy. Flight was perfectly on time. Negative: Food and drink not very good, but that it is normal on any airline. Didn't expect anything else.

Business seating is soooo uncomfortable. You can sit straight up or lay down. You need pillows behind you because the back doesn’t lay down. Those are need to “prop” you up. The chair has no padding whatsoever. Food was gross. I’ve eaten on Finnair before and the food was exceptional. This time it gave 2 people in our party diarrhea. It was the chicken dish. I took 2 bites and didn’t eat anything more. The flight attendants were nice. You needed an additional lounge in Terminal D at DFW Airport. After waiting 40 minutes to enter, we finally gave up and went to a bar across from the club doors. I’m unsure if I’ll ever book a Finnair flight again.

Very good seat, very comfortable, good food, and good service.

It was a good flight, very comfortable seats for sleeping in business class. Probably the most comfortable business class seat I've ever had (20+ times in business class on various airlines). Service was good, but the only downside is my screen didn't work and it had to be reset multiple times to get it to shut off. I had to block my eyes because the screen was white almost the entire flight and I wore an eye mask when I slept. But when eating and reading in my seat, my eyes hurt because the only way to turn the screen off was reset it and the screen would only be off for a few minutes at a time.

Everything was wonderful! AirBus seats are more comfortable to sleep in as compared to the Boeing planes.

Great. It was awesome to have boarding from the front and back of the plane as it made the process go very quickly

Wish that everyone would board the back of the plane first. Also let kids on first. The gate wasn’t open at arrival and we waited 45 minutes to takeoff. They made up for time in the air.

Left early arrived early..right amount of talking from pilots..of course had to love the biscuit and water!

I would like a refund for the extra cost the seat I paid for. An oversized person sat next to me and I couldn’t fit on my seat and had to move to another seat.

Boarding gate at LAX was too crowded—two gates next to one another

The flight was delayed about an hour for a maintenance specialist to approve the maintenance repair

This flight was delayed but it worked in my favor because my Atlanta to Dallas flight was delayed.

This was a hard flight. 3 delays out of OKC (1 on the Tarmac). Delay in Atlanta coming to Dallas. total travel time was the equivalent of driving from OKC to Atlanta.

Like: flights are on time, good boarding process Can improve: planes are old, improve entertainment and make space more comfortable

Had to wait for a gate for a long time, then waited on the run way for a long time before leaving. The actual flights part was good.

The airplane was an old model, the overhead didn’t have enough room for people’s items and made boarding and boarding disappointing and stressful. Crew allowed passengers to bring more than the permitted baggage sizes.

Flying in the United States with the major airlines has become so underwhelming. A 2-3hr flight in most other parts of the world with the major carriers of the area comes with newer, CLEANER aircraft and significantly better in flight service in terms of both staff attitude and a actual meal service.

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

Information on your arrival and departure airports