Which layover airport has the shortest travel time from St. Louis to Helsinki?

Flights connecting via Chicago (ORD) have the shortest average one-way travel time: 12h 54m.

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

United Airlines and Iberia are the most popular carriers operating from Lambert-St Louis to Helsinki-Vantaa

Which airport is the most popular layover for flights between St. Louis and Helsinki?

Dallas (DFW) was the most common stop: 60% of momondo users choosing 1-stop flights on this route connected there.

Which layover airport has the shortest connection time from St. Louis to Helsinki?

Dallas (DFW) has the shortest average layover time for this route: 2h 16m.

Which layover airport offers the lowest fares from St. Louis to Helsinki?

Flights via Chicago (ORD) offer the lowest average round-trip price of $626.

When did momondo last update prices for flights from Lambert-St Louis Airport to Helsinki-Vantaa Airport?

Prices for flights from Lambert-St Louis Airport to Helsinki-Vantaa Airport refresh daily.

How many operators does momondo search for flights from Lambert-St Louis Airport to Helsinki-Vantaa Airport?

There are 2 operators available for flights from Lambert-St Louis Airport to Helsinki-Vantaa Airport as of March 2026.

How old do you have to be to fly from Lambert-St Louis Airport to Helsinki-Vantaa Airport?

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 Helsinki-Vantaa Airport.

What documentation or ID do you need to fly to Helsinki-Vantaa Airport?

The necessary travel and health documents for your Helsinki-Vantaa Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

$304 Cheap Flights from St. Louis to Helsinki in 2026

Q: What is the typical price of a round-trip flight between St. Louis and Helsinki?

Prices are currently high for flights on this route. Typical prices usually range from $675 to $623. The lowest price recently found on this route was $734.

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Find the cheapest flights from St. Louis to Helsinki

Round-trip

One-way

Cheap round-trip flights

Enter your travel dates to find the best prices.

3:42 pm - 1:30 am

STL

HEL

25h 48m

2 stops

4:00 pm - 11:37 pm

HEL

STL

39h 37m

2 stops

$734Scandinavian Airlines

Mon, Aug 24 - Sun, Aug 30

12:27 pm - 10:45 am

STL

HEL

14h 18m

1 stop

4:25 pm - 11:47 am

HEL

STL

27h 22m

1 stop

$777American Airlines

Thu, May 7 - Thu, May 14

10:14 am - 10:45 am

STL

HEL

16h 31m

1 stop

4:25 pm - 11:51 pm

HEL

STL

15h 26m

1 stop

$790Multiple Airlines

Mon, Aug 24 - Sun, Aug 30

12:27 pm - 10:45 am

STL

HEL

14h 18m

1 stop

4:25 pm - 11:56 pm

HEL

STL

15h 31m

1 stop

$837American Airlines

Fri, May 8 - Fri, May 15

10:14 am - 10:45 am

STL

HEL

16h 31m

1 stop

4:25 pm - 11:51 pm

HEL

STL

15h 26m

1 stop

$840Multiple Airlines

Mon, Aug 24 - Sun, Aug 30

1:59 pm - 4:40 pm

STL

HEL

18h 41m

2 stops

5:40 pm - 4:10 pm

HEL

STL

30h 30m

2 stops

$858Air France

Mon, May 11 - Mon, May 18

12:10 pm - 1:10 pm

STL

HEL

17h 00m

2 stops

6:15 pm - 1:25 pm

HEL

STL

27h 10m

1 stop

$860Multiple Airlines

Mon, Aug 24 - Sun, Aug 30

1:18 pm - 12:05 pm

STL

HEL

14h 47m

2 stops

6:15 pm - 1:25 pm

HEL

STL

27h 10m

1 stop

$861Lufthansa

Mon, Aug 24 - Sun, Aug 30

7:05 am - 1:35 am

STL

HEL

34h 30m

2 stops

5:55 pm - 1:25 pm

HEL

STL

27h 30m

1 stop

$867Multiple Airlines

Thu, May 7 - Thu, May 14

12:10 pm - 5:00 pm

STL

HEL

20h 50m

2 stops

7:40 pm - 1:25 pm

HEL

STL

25h 45m

2 stops

$870Multiple Airlines

Mon, Aug 24 - Sun, Aug 30

American Airlines flights from St. Louis to Helsinki

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

American Airlines

May 8

STL12:27 pmLambert-St Louis

14h 18m

1 stop

HEL10:45 amHelsinki-Vantaa

May 15

HEL4:25 pmHelsinki-Vantaa

15h 31m

1 stop

STL11:56 pmLambert-St Louis

$837

American Airlines

May 11

STL5:21 pmLambert-St Louis

12h 54m

1 stop

HEL2:15 pmHelsinki-Vantaa

May 18

HEL12:35 pmHelsinki-Vantaa

28h 19m

1 stop

STL8:54 amLambert-St Louis

$885

American Airlines

Aug 24

STL5:46 pmLambert-St Louis

13h 14m

2 stops

HEL3:00 pmHelsinki-Vantaa

Aug 30

HEL12:20 pmHelsinki-Vantaa

15h 26m

1 stop

STL7:46 pmLambert-St Louis

$890

Lufthansa flights from St. Louis to Helsinki

Our best Lufthansa deals on St. Louis to Helsinki flight tickets

Lufthansa

Aug 24

STL1:18 pmLambert-St Louis

14h 47m

2 stops

HEL12:05 pmHelsinki-Vantaa

Aug 30

HEL6:15 pmHelsinki-Vantaa

27h 10m

1 stop

STL1:25 pmLambert-St Louis

$861

Lufthansa

May 24

STL12:55 pmLambert-St Louis

28h 40m

2 stops

HEL1:35 amHelsinki-Vantaa

Jun 3

HEL6:35 amHelsinki-Vantaa

14h 50m

1 stop

STL1:25 pmLambert-St Louis

$980

Lufthansa

May 24

STL12:55 pmLambert-St Louis

28h 40m

2 stops

HEL1:35 amHelsinki-Vantaa

Jun 4

HEL6:00 amHelsinki-Vantaa

23h 16m

2 stops

STL9:16 pmLambert-St Louis

$989

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Mon 8/24

3:42 pm-1:30 am

2 stops25h 48m

Helsinki-Vantaa

Sun 8/30

4:00 pm-11:37 pm

2 stops39h 37m

$734

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Thu 5/7

12:27 pm-10:45 am

1 stop14h 18m

Helsinki-Vantaa

Thu 5/14

4:25 pm-11:47 am

1 stop27h 22m

$777

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Mon 8/24

10:14 am-10:45 am

1 stop16h 31m

Helsinki-Vantaa

Sun 8/30

4:25 pm-11:51 pm

1 stop15h 26m

$790

Quickest round-trip

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Fri 5/8

12:27 pm-10:45 am

1 stop14h 18m

Helsinki-Vantaa

Fri 5/15

4:25 pm-11:56 pm

1 stop15h 31m

$837

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Mon 8/24

10:14 am-10:45 am

1 stop16h 31m

Helsinki-Vantaa

Sun 8/30

4:25 pm-11:51 pm

1 stop15h 26m

$840

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Mon 5/11

1:59 pm-4:40 pm

2 stops18h 41m

Helsinki-Vantaa

Mon 5/18

5:40 pm-4:10 pm

2 stops30h 30m

$858

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Mon 8/24

12:10 pm-1:10 pm

2 stops17h 00m

Helsinki-Vantaa

Sun 8/30

6:15 pm-1:25 pm

1 stop27h 10m

$860

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Mon 8/24

1:18 pm-12:05 pm

2 stops14h 47m

Helsinki-Vantaa

Sun 8/30

6:15 pm-1:25 pm

1 stop27h 10m

$861

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Thu 5/7

7:05 am-1:35 am

2 stops34h 30m

Helsinki-Vantaa

Thu 5/14

5:55 pm-1:25 pm

1 stop27h 30m

$867

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Mon 8/24

12:10 pm-5:00 pm

2 stops20h 50m

Helsinki-Vantaa

Sun 8/30

7:40 pm-1:25 pm

2 stops25h 45m

$870

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 Helsinki

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

Layovers

What is the typical price of a round-trip flight between St. Louis and Helsinki?

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

You could potentially save up to 28% on your flight if you consider stops on a St. Louis to Helsinki flight.

When to book flights from St. Louis to Helsinki

Are you open to changing your travel dates? Check out the ideal times to fly from St. Louis to Helsinki according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap St. Louis to Helsinki (STL to HEL) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from St. Louis to Helsinki

Fastest flight time	15h 42m
Direct flights	None

The fastest flight from St. Louis to Helsinki takes 15h 42m

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

Search flight deals

How far is Lambert-St Louis to Helsinki-Vantaa by plane?
The distance between Lambert-St Louis and Helsinki-Vantaa is about 4687.3 mi. 15h 42m is a normal flight duration for this route.
When did momondo last update prices for flights from Lambert-St Louis Airport to Helsinki-Vantaa Airport?
Prices for flights from Lambert-St Louis Airport to Helsinki-Vantaa Airport refresh daily.
How many operators does momondo search for flights from Lambert-St Louis Airport to Helsinki-Vantaa Airport?
There are 2 operators available for flights from Lambert-St Louis Airport to Helsinki-Vantaa Airport as of March 2026.
How old do you have to be to fly from Lambert-St Louis Airport to Helsinki-Vantaa Airport?
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 Helsinki-Vantaa Airport.
What documentation or ID do you need to fly to Helsinki-Vantaa Airport?
The necessary travel and health documents for your Helsinki-Vantaa Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.
What is the most popular airline from St. Louis to Helsinki?
Based on momondo bookings for flights between St. Louis and Helsinki, the leading airline is American Airlines, making up 56% of the total bookings. Other popular airlines include Finnair with 44%.

Best airlines flying from St. Louis to Helsinki

Compare and see reviews for airlines that fly from St. Louis to Helsinki with momondo

Airline	Rating	Free Cancellation	Price
Finnair	PriceFrom $433	Free Cancellation	Rating 7.7 1,375 reviews		Search Finnair flights
American Airlines	PriceFrom $481	Free Cancellation	Rating 7.1 11,520 reviews		Search American Airlines flights

Vantaa

Espoo

Lahti

Kotka

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Why should I use momondo to find a flight deal from St. Louis to Helsinki?

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Can I find flights from St. Louis to Helsinki with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to Helsinki from St. Louis with this policy.

How can momondo help me find flights from St. Louis to Helsinki?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from St. Louis to Helsinki.

I’m not ready to book a flight from St. Louis to Helsinki right now. Can momondo alert me if prices change?

Yes. momondo can track prices for St. Louis to Helsinki flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.