What is the cheapest airline that flies from Lambert-St Louis to Finland?

Lufthansa is the most popular carrier operating from Lambert-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 August 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.

$332 Cheap Flights from St. Louis to Finland in 2026

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from St. Louis to Finland

Round-trip

One-way

Cheap round-trip flights

Enter your travel dates to find the best prices.

7:03 am - 11:50 amSTL Lambert-St Louis-HEL Helsinki-Vantaa

20h 47m1 stop Miami

12:30 pm - 10:05 pmHEL Helsinki-Vantaa-STL Lambert-St Louis

17h 35m1 stop Dallas/Fort Worth

$728Multiple Airlines

Sun, Jan 10 - Thu, Jan 14

10:12 am - 1:55 pmSTL Lambert-St Louis-HEL Helsinki-Vantaa

19h 43m2 stops Dallas/Fort Worth New York John F Kennedy Intl

12:30 pm - 11:34 pmHEL Helsinki-Vantaa-STL Lambert-St Louis

19h 04m1 stop Dallas/Fort Worth

$732Multiple Airlines

Sun, Jan 10 - Thu, Jan 14

1:06 pm - 1:55 pmSTL Lambert-St Louis-HEL Helsinki-Vantaa

16h 49m2 stops Chicago O'Hare Intl New York John F Kennedy Intl

12:30 pm - 11:58 pmHEL Helsinki-Vantaa-STL Lambert-St Louis

19h 28m2 stops Dallas/Fort Worth Chicago O'Hare Intl

$737American Airlines

Sun, Jan 10 - Thu, Jan 14

9:40 am - 6:45 pmSTL Lambert-St Louis-HEL Helsinki-Vantaa

25h 05m2 stops Chicago O'Hare Intl Munich Franz Josef Strauss

12:35 pm - 9:13 pmHEL Helsinki-Vantaa-STL Lambert-St Louis

16h 38m2 stops Munich Franz Josef Strauss Chicago O'Hare Intl

$748United Airlines

Mon, Feb 8 - Thu, Feb 11

8:33 am - 11:50 amSTL Lambert-St Louis-HEL Helsinki-Vantaa

19h 17m3 stops Chicago O'Hare Intl Newark Munich Franz Josef Strauss

12:35 pm - 9:13 pmHEL Helsinki-Vantaa-STL Lambert-St Louis

16h 38m2 stops Munich Franz Josef Strauss Chicago O'Hare Intl

$753United Airlines

Sun, Jan 10 - Thu, Jan 14

1:49 pm - 2:15 pmSTL Lambert-St Louis-HEL Helsinki-Vantaa

16h 26m1 stop Chicago O'Hare Intl

12:35 pm - 7:48 pmHEL Helsinki-Vantaa-STL Lambert-St Louis

15h 13m1 stop Dallas/Fort Worth

$831American Airlines

Thu, Oct 1 - Thu, Oct 8

6:56 pm - 11:10 amSTL Lambert-St Louis-HEL Helsinki-Vantaa

32h 14m1 stop Dallas/Fort Worth

1:25 pm - 10:25 pmHEL Helsinki-Vantaa-STL Lambert-St Louis

17h 00m1 stop Miami

$1,252Finnair

Sat, Dec 26 - Mon, Jan 4

6:56 pm - 11:10 amSTL Lambert-St Louis-HEL Helsinki-Vantaa

32h 14m1 stop Dallas/Fort Worth

1:25 pm - 10:25 pmHEL Helsinki-Vantaa-STL Lambert-St Louis

17h 00m1 stop Miami

$1,256Finnair

Sat, Dec 26 - Mon, Jan 4

6:56 pm - 11:10 amSTL Lambert-St Louis-HEL Helsinki-Vantaa

32h 14m1 stop Dallas/Fort Worth

12:30 pm - 9:26 amHEL Helsinki-Vantaa-STL Lambert-St Louis

28h 56m1 stop Dallas/Fort Worth

$1,274Finnair

Sat, Dec 26 - Mon, Jan 4

5:00 am - 11:10 amSTL Lambert-St Louis-HEL Helsinki-Vantaa

22h 10m1 stop Dallas/Fort Worth

12:30 pm - 12:16 amHEL Helsinki-Vantaa-STL Lambert-St Louis

19h 46m1 stop Dallas/Fort Worth

$1,286American Airlines

Wed, Dec 23 - Mon, Dec 28

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United Airlines flights from St. Louis to Finland

Our best United Airlines deals on St. Louis to Finland flight tickets

United Airlines

Feb 8

STL9:40 amLambert-St Louis

25h 05m

2 stops

HEL6:45 pmHelsinki-Vantaa

Feb 11

HEL12:35 pmHelsinki-Vantaa

16h 38m

2 stops

STL9:13 pmLambert-St Louis

$748

United Airlines

Jan 10

STL8:33 amLambert-St Louis

19h 17m

3 stops

HEL11:50 amHelsinki-Vantaa

Jan 14

HEL12:35 pmHelsinki-Vantaa

16h 38m

2 stops

STL9:13 pmLambert-St Louis

$753

United Airlines

Jan 10

STL1:08 pmLambert-St Louis

38h 42m

2 stops

HEL11:50 amHelsinki-Vantaa

Jan 14

HEL12:35 pmHelsinki-Vantaa

16h 38m

2 stops

STL9:13 pmLambert-St Louis

$821

British Airways flights from St. Louis to Finland

Our best British Airways deals on St. Louis to Finland flight tickets

British Airways

Feb 8

STL5:27 pmLambert-St Louis

34h 53m

2 stops

HEL12:20 pmHelsinki-Vantaa

Feb 11

HEL12:30 pmHelsinki-Vantaa

17h 35m

1 stop

STL10:05 pmLambert-St Louis

$950

British Airways

Jan 10

STL5:27 pmLambert-St Louis

21h 38m

2 stops

HEL11:05 pmHelsinki-Vantaa

Jan 14

HEL12:30 pmHelsinki-Vantaa

17h 35m

1 stop

STL10:05 pmLambert-St Louis

$1,244

British Airways

Jan 10

STL5:27 pmLambert-St Louis

21h 38m

2 stops

HEL11:05 pmHelsinki-Vantaa

Jan 14

HEL12:30 pmHelsinki-Vantaa

17h 35m

1 stop

STL10:05 pmLambert-St Louis

$1,257

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisHelsinki

STL Lambert-St Louis - HEL Helsinki-Vantaa

STLHEL

Lambert-St Louis

Sun 1/10

7:03 am-11:50 am

1 stop20h 47m

Helsinki-Vantaa

Thu 1/14

12:30 pm-10:05 pm

1 stop17h 35m

$728

St. LouisHelsinki

STL Lambert-St Louis - HEL Helsinki-Vantaa

STLHEL

Lambert-St Louis

Sun 1/10

10:12 am-1:55 pm

2 stops19h 43m

Helsinki-Vantaa

Thu 1/14

12:30 pm-11:34 pm

1 stop19h 04m

$732

St. LouisHelsinki

STL Lambert-St Louis - HEL Helsinki-Vantaa

STLHEL

Lambert-St Louis

Sun 1/10

1:06 pm-1:55 pm

2 stops16h 49m

Helsinki-Vantaa

Thu 1/14

12:30 pm-11:58 pm

2 stops19h 28m

$737

St. LouisHelsinki

STL Lambert-St Louis - HEL Helsinki-Vantaa

STLHEL

Lambert-St Louis

Mon 2/8

9:40 am-6:45 pm

2 stops25h 05m

Helsinki-Vantaa

Thu 2/11

12:35 pm-9:13 pm

2 stops16h 38m

$748

St. LouisHelsinki

STL Lambert-St Louis - HEL Helsinki-Vantaa

STLHEL

Lambert-St Louis

Sun 1/10

8:33 am-11:50 am

3 stops19h 17m

Helsinki-Vantaa

Thu 1/14

12:35 pm-9:13 pm

2 stops16h 38m

$753

Quickest round-trip

St. LouisHelsinki

STL Lambert-St Louis - HEL Helsinki-Vantaa

STLHEL

Lambert-St Louis

Thu 10/1

1:49 pm-2:15 pm

1 stop16h 26m

Helsinki-Vantaa

Thu 10/8

12:35 pm-7:48 pm

1 stop15h 13m

$831

St. LouisHelsinki

STL Lambert-St Louis - HEL Helsinki-Vantaa

STLHEL

Lambert-St Louis

Sat 12/26

6:56 pm-11:10 am

1 stop32h 14m

Helsinki-Vantaa

Mon 1/4

1:25 pm-10:25 pm

1 stop17h 00m

$1,252

St. LouisHelsinki

STL Lambert-St Louis - HEL Helsinki-Vantaa

STLHEL

Lambert-St Louis

Sat 12/26

6:56 pm-11:10 am

1 stop32h 14m

Helsinki-Vantaa

Mon 1/4

1:25 pm-10:25 pm

1 stop17h 00m

$1,256

St. LouisHelsinki

STL Lambert-St Louis - HEL Helsinki-Vantaa

STLHEL

Lambert-St Louis

Sat 12/26

6:56 pm-11:10 am

1 stop32h 14m

Helsinki-Vantaa

Mon 1/4

12:30 pm-9:26 am

1 stop28h 56m

$1,274

St. LouisHelsinki

STL Lambert-St Louis - HEL Helsinki-Vantaa

STLHEL

Lambert-St Louis

Wed 12/23

5:00 am-11:10 am

1 stop22h 10m

Helsinki-Vantaa

Mon 12/28

12:30 pm-12:16 am

1 stop19h 46m

$1,286

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

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

Prices

Airlines

What is the cheapest month to fly to Finland?

If you don’t want to visit Finland in June, then you should wait until January to fly from St. Louis, when ticket prices are also cheap, with an average price of $0.

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

You could potentially save up to 40% 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	$332
Fastest flight time	17h 20m
Direct flights	None

The best one-way flight to Finland from St. Louis in the past 72 hours is $332. The best round-trip flight deal from St. Louis to Finland found on momondo in the last 72 hours is $728.

The fastest flight from St. Louis to Finland takes 17h 20m

There are no direct flights from St. Louis to Finland. There are no popular flight routes from St. Louis to Finland.

Search flight deals

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 August 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
Finnair	PriceFrom $433	Free Cancellation	Rating 7.6 1,428 reviews		Search Finnair flights
American Airlines	PriceFrom $484	Free Cancellation	Rating 7.1 11,989 reviews		Search American 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.