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

American Airlines, Delta, and United Airlines are the most popular carriers 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 June 2026, there is 1 operator 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.

$340 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

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

7:04 pm - 6:50 pm

STL

HEL

15h 46m

2 stops

7:05 am - 1:45 pm

HEL

STL

14h 40m

1 stop

$724Lufthansa

Mon, Nov 9 - Wed, Nov 25

5:17 am - 11:10 am

STL

HEL

21h 53m

1 stop

12:30 pm - 7:30 pm

HEL

STL

15h 00m

1 stop

$727Multiple Airlines

Mon, Nov 9 - Tue, Nov 24

7:04 pm - 6:50 pm

STL

HEL

15h 46m

2 stops

7:05 am - 1:45 pm

HEL

STL

14h 40m

1 stop

$730Lufthansa

Tue, Nov 10 - Wed, Nov 25

2:50 pm - 1:55 pm

STL

HEL

15h 05m

2 stops

12:30 pm - 10:29 pm

HEL

STL

17h 59m

1 stop

$731American Airlines

Mon, Nov 9 - Tue, Nov 24

2:50 pm - 1:55 pm

STL

HEL

15h 05m

2 stops

12:30 pm - 12:05 am

HEL

STL

19h 35m

2 stops

$732American Airlines

Mon, Nov 9 - Tue, Nov 24

3:40 pm - 1:00 pm

STL

HEL

13h 20m

1 stop

7:05 am - 1:45 pm

HEL

STL

14h 40m

1 stop

$737Lufthansa

Sun, Nov 8 - Wed, Nov 25

1:30 pm - 4:40 pm

STL

HEL

19h 10m

2 stops

6:50 am - 8:49 pm

HEL

STL

21h 59m

2 stops

$739Delta

Tue, Nov 10 - Tue, Nov 24

7:04 pm - 6:50 pm

STL

HEL

15h 46m

2 stops

7:05 am - 4:56 pm

HEL

STL

17h 51m

2 stops

$740Lufthansa

Mon, Nov 9 - Wed, Nov 25

7:04 pm - 6:50 pm

STL

HEL

15h 46m

2 stops

12:45 pm - 9:13 pm

HEL

STL

16h 28m

2 stops

$742United Airlines

Mon, Dec 7 - Wed, Dec 16

7:05 pm - 5:25 pm

STL

HEL

14h 20m

2 stops

6:50 am - 4:50 pm

HEL

STL

18h 00m

2 stops

$743KLM

Sun, Nov 8 - Tue, Nov 24

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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

Dec 7

STL7:04 pmLambert-St Louis

15h 46m

2 stops

HEL6:50 pmHelsinki-Vantaa

Dec 16

HEL12:45 pmHelsinki-Vantaa

16h 28m

2 stops

STL9:13 pmLambert-St Louis

$742

United Airlines

Dec 9

STL3:40 pmLambert-St Louis

17h 10m

1 stop

HEL4:50 pmHelsinki-Vantaa

Dec 18

HEL7:05 amHelsinki-Vantaa

14h 40m

1 stop

STL1:45 pmLambert-St Louis

$958

United Airlines

Jul 20

STL5:10 amLambert-St Louis

29h 45m

2 stops

HEL6:55 pmHelsinki-Vantaa

Jul 27

HEL1:50 pmHelsinki-Vantaa

31h 35m

1 stop

STL1:25 pmLambert-St Louis

$959

American Airlines flights from St. Louis to Finland

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

American Airlines

Nov 9

STL2:50 pmLambert-St Louis

15h 05m

2 stops

HEL1:55 pmHelsinki-Vantaa

Nov 24

HEL12:30 pmHelsinki-Vantaa

17h 59m

1 stop

STL10:29 pmLambert-St Louis

$731

American Airlines

Nov 9

STL2:50 pmLambert-St Louis

15h 05m

2 stops

HEL1:55 pmHelsinki-Vantaa

Nov 24

HEL12:30 pmHelsinki-Vantaa

19h 35m

2 stops

STL12:05 amLambert-St Louis

$732

American Airlines

Aug 6

STL4:54 pmLambert-St Louis

13h 21m

1 stop

HEL2:15 pmHelsinki-Vantaa

Aug 13

HEL12:30 pmHelsinki-Vantaa

19h 04m

2 stops

STL11:34 pmLambert-St Louis

$1,013

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Mon 11/9

7:04 pm-6:50 pm

2 stops15h 46m

Helsinki-Vantaa

Wed 11/25

7:05 am-1:45 pm

1 stop14h 40m

$724

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Mon 11/9

5:17 am-11:10 am

1 stop21h 53m

Helsinki-Vantaa

Tue 11/24

12:30 pm-7:30 pm

1 stop15h 00m

$727

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Tue 11/10

7:04 pm-6:50 pm

2 stops15h 46m

Helsinki-Vantaa

Wed 11/25

7:05 am-1:45 pm

1 stop14h 40m

$730

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Mon 11/9

2:50 pm-1:55 pm

2 stops15h 05m

Helsinki-Vantaa

Tue 11/24

12:30 pm-10:29 pm

1 stop17h 59m

$731

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Mon 11/9

2:50 pm-1:55 pm

2 stops15h 05m

Helsinki-Vantaa

Tue 11/24

12:30 pm-12:05 am

2 stops19h 35m

$732

Quickest round-trip

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Sun 11/8

3:40 pm-1:00 pm

1 stop13h 20m

Helsinki-Vantaa

Wed 11/25

7:05 am-1:45 pm

1 stop14h 40m

$737

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Tue 11/10

1:30 pm-4:40 pm

2 stops19h 10m

Helsinki-Vantaa

Tue 11/24

6:50 am-8:49 pm

2 stops21h 59m

$739

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Mon 11/9

7:04 pm-6:50 pm

2 stops15h 46m

Helsinki-Vantaa

Wed 11/25

7:05 am-4:56 pm

2 stops17h 51m

$740

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Mon 12/7

7:04 pm-6:50 pm

2 stops15h 46m

Helsinki-Vantaa

Wed 12/16

12:45 pm-9:13 pm

2 stops16h 28m

$742

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Sun 11/8

7:05 pm-5:25 pm

2 stops14h 20m

Helsinki-Vantaa

Tue 11/24

6:50 am-4:50 pm

2 stops18h 00m

$743

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 19% 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

Fastest flight time	12h 17m
Direct flights	None

The fastest flight from St. Louis to Finland takes 12h 17m

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 June 2026, there is 1 operator 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
American Airlines	PriceFrom $481	Free Cancellation	Rating 7.1 11,751 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.