Cheap flights from St. Louis to Finland from $692
This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Finland departing on 2/23. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
Discover deals from 900+ travel sites with momondo.
Find the cheapest flights from St. Louis to Finland
Cheap round-trip flights
Save money when you book flights with momondo
Big names and deals
Big names and deals
Search 100s of travel sites to compare prices.Filter for what you want
Filter for what you want
Free Wi-Fi? Stopover? Instantly customize your results.Trusted and free
Trusted and free
We’re completely free to use - no hidden charges or fees.Price Alerts
Price Alerts
Not ready to book? to track prices.United Airlines flights from St. Louis to Finland
Our best United Airlines deals on St. Louis to Finland flight tickets
British Airways flights from St. Louis to Finland
Our best British Airways deals on St. Louis to Finland flight tickets
momondo Fare Finder
Use the filters below to find and compare flights from St. Louis to Finland that are best for you.
Fly from
Fly to
Route
Depart
Return
St. LouisHelsinki
STL Lambert-St Louis - HEL Helsinki-Vantaa
STLHEL
Lambert-St Louis
Tue 2/23
10:07 am-6:45 pm
2 stops24h 38m
Helsinki-Vantaa
Wed 3/3
7:05 am-1:45 pm
1 stop14h 40m
St. LouisHelsinki
STL Lambert-St Louis - HEL Helsinki-Vantaa
STLHEL
Lambert-St Louis
Tue 2/23
10:07 am-6:45 pm
2 stops24h 38m
Helsinki-Vantaa
Wed 3/3
7:05 am-3:26 pm
2 stops16h 21m
St. LouisHelsinki
STL Lambert-St Louis - HEL Helsinki-Vantaa
STLHEL
Lambert-St Louis
Tue 2/23
12:20 pm-11:50 am
1 stop15h 30m
Helsinki-Vantaa
Wed 3/3
12:30 pm-7:41 pm
1 stop15h 11m
St. LouisHelsinki
STL Lambert-St Louis - HEL Helsinki-Vantaa
STLHEL
Lambert-St Louis
Sun 2/28
7:33 am-6:45 pm
2 stops27h 12m
Helsinki-Vantaa
Thu 3/4
12:35 pm-9:13 pm
2 stops16h 38m
St. LouisHelsinki
STL Lambert-St Louis - HEL Helsinki-Vantaa
STLHEL
Lambert-St Louis
Wed 1/6
10:45 am-5:25 pm
2 stops22h 40m
Helsinki-Vantaa
Wed 1/13
6:40 am-8:51 pm
2 stops22h 11m
St. LouisHelsinki
STL Lambert-St Louis - HEL Helsinki-Vantaa
STLHEL
Lambert-St Louis
Thu 10/22
5:27 pm-2:15 pm
1 stop12h 48m
Helsinki-Vantaa
Fri 10/30
12:30 pm-11:42 pm
1 stop18h 12m
St. LouisHelsinki
STL Lambert-St Louis - HEL Helsinki-Vantaa
STLHEL
Lambert-St Louis
Thu 10/22
5:27 pm-2:15 pm
1 stop12h 48m
Helsinki-Vantaa
Fri 10/30
12:30 pm-11:42 pm
1 stop18h 12m
St. LouisHelsinki
STL Lambert-St Louis - HEL Helsinki-Vantaa
STLHEL
Lambert-St Louis
Thu 10/22
5:27 pm-2:15 pm
1 stop12h 48m
Helsinki-Vantaa
Fri 10/30
12:30 pm-12:19 am
2 stops18h 49m
St. LouisHelsinki
STL Lambert-St Louis - HEL Helsinki-Vantaa
STLHEL
Lambert-St Louis
Sun 2/28
11:19 am-11:50 am
1 stop16h 31m
Helsinki-Vantaa
Thu 3/4
1:25 pm-9:51 pm
1 stop16h 26m
St. LouisHelsinki
STL Lambert-St Louis - HEL Helsinki-Vantaa
STLHEL
Lambert-St Louis
Sun 2/28
12:20 pm-11:50 am
1 stop15h 30m
Helsinki-Vantaa
Thu 3/4
1:25 pm-9:51 pm
1 stop16h 26m
See travel insights to Finland from
How to get the cheapest flight ticket from St. Louis to Finland
Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip
What is the cheapest month to fly to Finland?
If you don’t want to visit Finland in January, then you should wait until February to fly from St. Louis, when ticket prices are also cheap, with an average price of $549.
Can stopping save me money on St. Louis to Finland flights?
You could potentially save up to 10% on your flight if you consider stops on a St. Louis to Finland flight.
Cheap St. Louis to Finland flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from St. Louis to Finland
Frequently asked questions about flying from St. Louis to Finland
When did momondo last update prices for flights from Lambert-St Louis Airport to Finland?
Prices for flights from Lambert-St Louis Airport to Finland are refreshed on a daily basis.
How many operators does momondo search for flights from Lambert-St Louis Airport to Finland?
As of October 2026, there are 2 operators available to choose from for flights from Lambert-St Louis Airport to Finland.
How old do you have to be to fly from Lambert-St Louis Airport to Finland?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Lambert-St Louis Airport to Finland.
What documentation or ID do you need to fly to Finland?
The travel and health documents you'll need for your trip to Finland may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Finland. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
Best airlines flying from St. Louis to Finland
Compare and see reviews for airlines that fly from St. Louis to Finland with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $433 | Free Cancellation | Rating 7.6 1,425 reviews | |||
| PriceFrom $484 | Free Cancellation | Rating 7.0 12,152 reviews |
Why use momondo?
Why should I use momondo to find a flight deal from St. Louis to Finland?
To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Finland from St. Louis.
Can I find flights from St. Louis to Finland with flexible booking policies on momondo?
Yes. momondo allows you to filter the results for St. Louis to Finland flights to just show those with flexible booking policies.
How can momondo help me find flights from St. Louis to Finland?
momondo helps you find the best flight between St. Louis and Finland by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.
I’m not ready to book a flight from St. Louis to Finland right now. Can momondo alert me if prices change?
If you are not ready to book a flight from St. Louis to Finland now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Finland and let you know when they change.