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Cheap flights from St. Louis to Finland from $419

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Finland departing on 10/20. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from St. Louis to Finland

Cheap round-trip flights

British Airways Logo
1:53 pm - 2:20 pmSTL-HEL
16h 27m2 stops
British Airways Logo
12:35 pm - 8:53 pmHEL-STL
16h 18m1 stop
$479British Airways
Find Deal
Sun, Oct 5 - Tue, Oct 21
Logo
7:01 am - 10:45 amSTL-HEL
19h 44m1 stop
Logo
12:30 pm - 8:53 amHEL-STL
27h 23m1 stop
$482
Find Deal
Sun, Oct 19 - Tue, Oct 28
British Airways Logo
8:05 pm - 2:20 pmSTL-HEL
34h 15m2 stops
British Airways Logo
12:30 pm - 11:18 pmHEL-STL
17h 48m1 stop
$487British Airways
Find Deal
Sun, Oct 19 - Tue, Oct 28
British Airways Logo
8:05 pm - 2:20 pmSTL-HEL
34h 15m2 stops
British Airways Logo
4:00 pm - 8:26 pmHEL-STL
59h 26m2 stops
$514British Airways
Find Deal
Sun, Oct 19 - Tue, Oct 28
Air Canada Logo
9:15 am - 6:55 pmSTL-HEL
25h 40m2 stops
Air Canada Logo
6:10 am - 3:18 pmHEL-STL
17h 08m2 stops
$525Air Canada
Find Deal
Sun, Oct 5 - Tue, Oct 21
Lufthansa Logo
12:25 pm - 11:55 amSTL-HEL
15h 30m2 stops
Lufthansa Logo
7:05 am - 11:44 pmHEL-STL
23h 39m2 stops
$542Lufthansa
Find Deal
Sun, Oct 19 - Tue, Oct 28
United Airlines Logo
12:25 pm - 11:55 amSTL-HEL
15h 30m2 stops
United Airlines Logo
1:55 pm - 2:55 pmHEL-STL
32h 00m1 stop
$556United Airlines
Find Deal
Sun, Oct 19 - Tue, Oct 28
Lufthansa Logo
12:25 pm - 11:55 amSTL-HEL
15h 30m2 stops
Lufthansa Logo
1:55 pm - 2:55 pmHEL-STL
32h 00m1 stop
$570Lufthansa
Find Deal
Sun, Oct 19 - Tue, Oct 28
American Airlines Logo
1:21 pm - 2:00 pmSTL-HEL
16h 39m2 stops
American Airlines Logo
12:35 pm - 9:53 pmHEL-STL
17h 18m2 stops
$630American Airlines
Find Deal
Tue, Sep 9 - Tue, Sep 23
American Airlines Logo
12:28 pm - 10:45 amSTL-HEL
14h 17m1 stop
American Airlines Logo
12:35 pm - 8:15 pmHEL-STL
15h 40m1 stop
$706American Airlines
Find Deal
Tue, Sep 9 - Tue, Sep 23

Lufthansa flights from St. Louis to Finland

Our best Lufthansa deals on St. Louis to Finland flight tickets
Lufthansa
Oct 19
STL12:25 pmLambert-St Louis
15h 30m
2 stops
HEL11:55 amHelsinki-Vantaa
Oct 28
HEL7:05 amHelsinki-Vantaa
23h 39m
2 stops
STL11:44 pmLambert-St Louis
$542
Find similar
Lufthansa
Oct 19
STL12:25 pmLambert-St Louis
15h 30m
2 stops
HEL11:55 amHelsinki-Vantaa
Oct 28
HEL1:55 pmHelsinki-Vantaa
32h 00m
1 stop
STL2:55 pmLambert-St Louis
$570
Find similar

American Airlines flights from St. Louis to Finland

Our best American Airlines deals on St. Louis to Finland flight tickets
American Airlines
Sep 9
STL1:21 pmLambert-St Louis
16h 39m
2 stops
HEL2:00 pmHelsinki-Vantaa
Sep 23
HEL12:35 pmHelsinki-Vantaa
17h 18m
2 stops
STL9:53 pmLambert-St Louis
$630
Find similar
American Airlines
Sep 9
STL12:28 pmLambert-St Louis
14h 17m
1 stop
HEL10:45 amHelsinki-Vantaa
Sep 23
HEL12:35 pmHelsinki-Vantaa
15h 40m
1 stop
STL8:15 pmLambert-St Louis
$706
Find similar
American Airlines
Aug 21
STL4:54 pmLambert-St Louis
14h 51m
2 stops
HEL3:45 pmHelsinki-Vantaa
Aug 23
HEL8:00 amHelsinki-Vantaa
19h 21m
2 stops
STL7:21 pmLambert-St Louis
$1,658
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from St. Louis to Finland that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated August 18, 2025.
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

Price

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Sun 10/5

1:53 pm-2:20 pm

2 stops16h 27m

Helsinki-Vantaa

Tue 10/21

12:35 pm-8:53 pm

1 stop16h 18m

$479

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Sun 10/19

7:01 am-10:45 am

1 stop19h 44m

Helsinki-Vantaa

Tue 10/28

12:30 pm-8:53 am

1 stop27h 23m

$482

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Sun 10/19

8:05 pm-2:20 pm

2 stops34h 15m

Helsinki-Vantaa

Tue 10/28

12:30 pm-11:18 pm

1 stop17h 48m

$487

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Sun 10/19

8:05 pm-2:20 pm

2 stops34h 15m

Helsinki-Vantaa

Tue 10/28

4:00 pm-8:26 pm

2 stops59h 26m

$514

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Sun 10/5

9:15 am-6:55 pm

2 stops25h 40m

Helsinki-Vantaa

Tue 10/21

6:10 am-3:18 pm

2 stops17h 08m

$525

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Sun 10/19

12:25 pm-11:55 am

2 stops15h 30m

Helsinki-Vantaa

Tue 10/28

7:05 am-11:44 pm

2 stops23h 39m

$542

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Sun 10/19

12:25 pm-11:55 am

2 stops15h 30m

Helsinki-Vantaa

Tue 10/28

1:55 pm-2:55 pm

1 stop32h 00m

$556

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Sun 10/19

12:25 pm-11:55 am

2 stops15h 30m

Helsinki-Vantaa

Tue 10/28

1:55 pm-2:55 pm

1 stop32h 00m

$570

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Tue 9/9

1:21 pm-2:00 pm

2 stops16h 39m

Helsinki-Vantaa

Tue 9/23

12:35 pm-9:53 pm

2 stops17h 18m

$630

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Tue 9/9

12:28 pm-10:45 am

1 stop14h 17m

Helsinki-Vantaa

Tue 9/23

12:35 pm-8:15 pm

1 stop15h 40m

$706

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 11 resultsSorted by cheapest first
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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 day to depart on your flight to Finland?

The cheapest day to depart from St. Louis to Finland is on a Tuesday. Travelers who choose to depart for Finland on a Tuesday will often find tickets for as low as $511. Be sure to avoid booking your departure on a Wednesday as prices are generally higher than usual. According to our data, the average ticket price to Finland on Wednesday is $1,482.

What is the cheapest time of day to depart on your flight to Finland?

The cheapest time of day to fly to Finland is in the morning when flights can be purchased for as low as $706. In contrast, the most expensive time of day to depart to Finland is at noon when prices are around $1,476.

Can stopping save me money on St. Louis to Finland flights?

You could potentially save up to 3% 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

Best Price Found

$419

Fastest flight time

14h 17m

Direct flights

None

Airports in Finland

1 airport
The best one-way flight to Finland from St. Louis in the past 72 hours is $419. The best round-trip flight deal from St. Louis to Finland found on momondo in the last 72 hours is $479.
The fastest flight from St. Louis to Finland takes 14h 17m
There are no direct flights from St. Louis to Finland. Popular non-direct route for this connection is Lambert-St Louis Airport - Helsinki-Vantaa Airport.
There is 1 airport near Finland: Helsinki-Vantaa (HEL)
Search flight deals

  • 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?

  • 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
American AirlinesPriceFrom $479Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
British AirwaysPriceFrom $500Free CancellationRating
6.6
7,277 reviews
Search British Airways flights
FinnairPriceFrom $506Free CancellationRating
7.6
1,320 reviews
Search Finnair flights
LufthansaPriceFrom $533Free CancellationRating
6.8
7,330 reviews
Search Lufthansa flights
United AirlinesPriceFrom $576Free CancellationRating
7.4
8,925 reviews
Search United Airlines flights

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.

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