$320 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 9/27. 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

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Cheap Flights from St. Louis to Finland

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
Helsinki
Helsinki1 stop$432
Helsinki
Helsinki1 stop$432

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

Sun, Oct 19 - Tue, Oct 28
Multiple Airlines Logo
8:49 am - 10:45 amSTL-HEL
17h 56m1 stop
Multiple Airlines Logo
4:50 pm - 9:46 amHEL-STL
23h 56m1 stop
$432Multiple Airlines
Find Deal
Sun, Oct 19 - Tue, Oct 28
Multiple Airlines Logo
8:49 am - 10:45 amSTL-HEL
17h 56m1 stop
Multiple Airlines Logo
12:30 pm - 8:53 pmHEL-STL
15h 23m1 stop
$433Multiple Airlines
Find Deal
Tue, Oct 21 - Fri, Oct 31
Delta Logo
9:31 am - 10:35 amSTL-HEL
17h 04m2 stops
Delta Logo
6:30 am - 8:08 pmHEL-STL
20h 38m2 stops
$474Delta
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Tue, Oct 21 - Tue, Oct 28
Delta Logo
9:31 am - 10:35 amSTL-HEL
17h 04m2 stops
Delta Logo
2:05 pm - 2:43 pmHEL-STL
31h 38m2 stops
$475Delta
Find Deal
Thu, Oct 30 - Thu, Nov 6
United Airlines Logo
11:49 am - 12:00 pmSTL-HEL
17h 11m2 stops
United Airlines Logo
6:55 am - 3:29 pmHEL-STL
40h 34m2 stops
$532United Airlines
Find Deal
Sun, Oct 19 - Tue, Oct 28
United Airlines Logo
6:30 am - 11:55 amSTL-HEL
21h 25m2 stops
United Airlines Logo
1:55 pm - 2:55 pmHEL-STL
32h 00m1 stop
$556United Airlines
Find Deal
Mon, Oct 20 - Tue, Oct 28
American Airlines Logo
10:10 am - 10:45 amSTL-HEL
16h 35m1 stop
American Airlines Logo
12:30 pm - 8:53 pmHEL-STL
15h 23m1 stop
$624American Airlines
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Thu, Oct 30 - Thu, Nov 6
American Airlines Logo
12:23 pm - 10:45 amSTL-HEL
15h 22m1 stop
American Airlines Logo
7:35 am - 8:21 pmHEL-STL
20h 46m2 stops
$634American Airlines
Find Deal
Sun, Oct 19 - Wed, Oct 29
Lufthansa Logo
3:30 pm - 12:50 pmSTL-HEL
13h 20m1 stop
Lufthansa Logo
6:55 am - 5:39 pmHEL-STL
17h 44m2 stops
$646Lufthansa
Find Deal
Mon, Oct 20 - Tue, Oct 28
Lufthansa Logo
5:28 pm - 6:55 pmSTL-HEL
17h 27m2 stops
Lufthansa Logo
1:55 pm - 2:55 pmHEL-STL
32h 00m1 stop
$662Lufthansa
Find Deal
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 72 hours.

In the past 3 days, the cheapest round-trip tickets from St. Louis to Finland were found on Delta ($474) and KLM ($488).

Good to know

Low seasonNovember
Cheapest flight$320
Best time to beat the crowds with an average 45% drop in price.
Most popular time to fly and prices are also 45% 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 3 airlines serving 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.
7.4
United AirlinesOverall score based on 8924 reviews
7.3Comfort
7.1Entertainment
6.6Food
8.1Crew
7.7Boarding
Airline reviews

Terrible. They wouldn't allow me on my flight on the 14th..

2.0 MediocreJulian, Sep 2025DEN - DRO
Read more United Airlines reviews

Terrible. They wouldn't allow me on my flight on the 14th..

We had to deboard 2 times due to maintenance issues. They changed the plane, and then we got deviated to LAX due to maibtenance issues on the other plane, had to sleep at LAX and los a full day.

Everything was good, except the seats in economy were so close together, you could barely get out when the seat in front of your was reclined. If the airlines keep jamming in more and more seats, it will become intolerable. I will look for another airline that considers customer comfort and does not keep adding more rows of seats for more profit.

The newer screen was super cool and had the option to watch many different shows or movies. Crew was polite and helpful. However again, many children screaming bloody murder and kicking my seat, and parents doing nothing about it as usual.

Flight was good and crew was super polite. However, there were around 5 kids screaming the WHOLE 2 hours. I understand kids have to come but parents need to do something to control their children. They make the experience terrible, especially after finishing 16 hour shifts at the hospital I needed some sleep, which I did not get.

IAD with the archaic people movers is just a place to be avoided.

Great service on board. Boarding a bit slow due to process. Food was pretty average.

Tastless food and too obvious lack of enthusiasm for service in the economy vesus business class

All of the United employees I interacted with were professional and courteous. The aircraft was clean, the food on the flight was good. No complaints here.

I had no checked baggage but was required to hand over carry on baggage at the door of the plane. There was a lot of overboard space in the plane and I was one of the last ones. I ran to get my carry on but it was gone. I was given back at the plane door in Toronto, so the wait was not as long as it would have been at the carousel.

Given it’s a red-eye into Charolotte, we didn’t get any food. The survey does not include “N/A” so the rating will be skewed.

Great. Quick and quiet and east. The breakfast choices were a welcome surprise!

American airlines suck they delay the flights all the time made me sleep in an airport because my flight was delayed and I miss my connecting flight

There's nothing I liked about it. For first off I scheduled this trip two weeks in advance then they delayed my flight which messed up my whole trip. So I scheduled it for the following weekend thinking there won't be a delay and guess what as soon as I got to the airport we said in the airplane on the tarmac for an hour and a half. Not only was it delayed I missed my connecting flight meaning I had to stay the night at Dallas-Fort Worth airport sleeping on the floor. I will tell you this I will never fly American airlines ever again I have had nothing but horrible experience with them and I just throw money at them

The stewardess hit me with the food kart twice on the head and didn't say I'm sorry once. The same stewardess gave me a warm Apple Juice with No ice. The Flight was delayed for Departure 6 times, starting from 2:36pm, finally taking off 7:50pm. I was late picking up my child from the sitter by 3 hours.

Don’t know they cancelled the flight day before I was to leave. They sent a email at 9:00 pm at night saying they cancelled. That is the smooth way to say we don’t want your business! I think they didn’t have enough people booking so they cancelled the flight! It’s all about the money anymore there is no honesty in business.

Having to reschedule flights a day later, they loaded by luggage on the wrong plane from Little rock now I have to HOPE they deliver it to where im staying like they said would. International flight crew was very disgruntled and not very friendly.

We will be writing a long, detailed letter to corporate about our awful experience with American airlines.

It took way too long to diagnose and solve the problem of a broken crew member cabin seat. Though compensation for the volunteer who left the flight was very kind.

The entertainment package was vast and the selections were very current. Keep updating it was great.

I liked Quiet people around me. Crew could have helped people with overhead luggage so they aren't moving other peoples bags around and causing problems for people that had there bags there first

The flight and crew were good. The customer experience on the ground could have been better. We had to reschedule our flight because of a delay on the previous flight. The attendants working the desk in Washington DC were not helpful. They told us to scan a QR code and that would get us rebooked. Why couldn't two people standing at their computers do this? We had to chat with someone to get everything figured out. It was extremely confusing.

The plane was delayed by two hours in Chicago which led to us missing the next flight. Lufthansa rebooked the flight and booked us a hotel for the night in Frankfurt. The level of customer service and getting us taken care of was superb. The flight crew and the service on the ground was superb.

It was a short flight, everything was good with it.

Flight was delayed over one hour and I had to pay to select my seat, even though my booking supposedly had free selection (I paid extra for this at time of booking)

Stop charging for alcohol overseas flights and start taking cash again not everyone wants to pay with card if the person is bigger give him seat on the outside seats not the middle in between the people is common sense and mainly if you fly for Lufthansa provides the sam service and experience...

good entertainment package but rather small seats for business class

The male attendant has zero personality. It seemed like he was over worked or hated his job, not once did he smile or made any contact with the people on the plane. Strictly business and call it a day!

Booked Economy but it translated to economy light for Lufthansa so now we are stuck paying an extra $75 per person both ways for our checked bags. If I had known that, I would have never booked these tickets because it came out to be more than other options. The booking in the kayak side clearly says Economy and has a link to the inormation for Lufthansa which states Economy included a checked bag. Super annoyed about that.

The flight from Dulles to Munich was just okay. The seats were comfortable and extra foot room was noticeable in comfort plus. Disappointed in the booking in so much I requested an aisle seat and then was assigned a middle seat. The food was inedible. Movie choices were moderate. I usually fly Delta, but this WA flight was cheaper. Next time, I'll happily pay the extra to fly Delta.

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