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

Dallas (DFW) was the most common stop: 57% of momondo users choosing 1-stop flights on this route connected there.

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

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

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

Flights via Dallas (DFW) offer the lowest average round-trip price of $651.

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

Frankfurt am Main (FRA) has the shortest average layover time for this route: 2h 18m.

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 36m.

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 July 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.

$338 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 typical for flights on this route. Typical prices usually range from $807 to $1,416. The lowest price recently found on this route was $839.

Discover deals from 900+ travel sites with momondo.

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.

4:54 pm - 2:15 pm

STL

HEL

13h 21m

1 stop

4:25 pm - 12:14 am

HEL

STL

15h 49m

1 stop

$839Finnair

Thu, Aug 20 - Wed, Sep 2

3:39 pm - 3:20 pm

STL

HEL

15h 41m

2 stops

4:00 pm - 11:58 pm

HEL

STL

39h 58m

2 stops

$852Scandinavian Airlines

Thu, Aug 20 - Wed, Sep 2

8:55 am - 6:55 pm

STL

HEL

26h 00m

2 stops

6:35 am - 1:25 pm

HEL

STL

14h 50m

1 stop

$866Multiple Airlines

Thu, Aug 20 - Wed, Sep 2

3:39 pm - 3:20 pm

STL

HEL

15h 41m

2 stops

6:10 am - 11:58 pm

HEL

STL

25h 48m

2 stops

$951Scandinavian Airlines

Thu, Aug 13 - Thu, Aug 20

9:32 am - 2:15 pm

STL

HEL

20h 43m

1 stop

4:25 pm - 12:14 am

HEL

STL

15h 49m

1 stop

$952Multiple Airlines

Thu, Aug 13 - Thu, Aug 20

1:25 pm - 2:00 pm

STL

HEL

16h 35m

2 stops

4:25 pm - 12:54 pm

HEL

STL

28h 29m

1 stop

$962American Airlines

Thu, Aug 13 - Thu, Aug 20

4:54 pm - 2:15 pm

STL

HEL

13h 21m

1 stop

12:30 pm - 11:34 pm

HEL

STL

19h 04m

2 stops

$972American Airlines

Thu, Aug 13 - Thu, Aug 20

3:39 pm - 1:30 am

STL

HEL

25h 51m

2 stops

7:15 am - 11:58 pm

HEL

STL

24h 43m

3 stops

$1,022Scandinavian Airlines

Thu, Aug 13 - Thu, Aug 20

5:45 pm - 4:40 pm

STL

HEL

14h 55m

2 stops

6:40 am - 4:50 pm

HEL

STL

18h 10m

2 stops

$1,094Air France

Wed, Dec 23 - Tue, Dec 29

7:04 pm - 1:00 pm

STL

HEL

33h 56m

2 stops

1:45 pm - 1:45 pm

HEL

STL

32h 00m

1 stop

$1,124Lufthansa

Wed, Dec 23 - Tue, Dec 29

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Finnair flights from St. Louis to Helsinki

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

Finnair

Aug 20

STL4:54 pmLambert-St Louis

13h 21m

1 stop

HEL2:15 pmHelsinki-Vantaa

Sep 2

HEL4:25 pmHelsinki-Vantaa

15h 49m

1 stop

STL12:14 amLambert-St Louis

$839

Finnair

Dec 26

STL6:44 pmLambert-St Louis

32h 26m

1 stop

HEL11:10 amHelsinki-Vantaa

Jan 4

HEL12:30 pmHelsinki-Vantaa

30h 26m

1 stop

STL10:56 amLambert-St Louis

$1,254

Finnair

Dec 26

STL6:44 pmLambert-St Louis

32h 26m

1 stop

HEL11:10 amHelsinki-Vantaa

Jan 4

HEL12:30 pmHelsinki-Vantaa

30h 26m

1 stop

STL10:56 amLambert-St Louis

$1,300

Scandinavian Airlines flights from St. Louis to Helsinki

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

Scandinavian Airlines

Aug 20

STL3:39 pmLambert-St Louis

15h 41m

2 stops

HEL3:20 pmHelsinki-Vantaa

Sep 2

HEL4:00 pmHelsinki-Vantaa

39h 58m

2 stops

STL11:58 pmLambert-St Louis

$852

Scandinavian Airlines

Aug 13

STL3:39 pmLambert-St Louis

15h 41m

2 stops

HEL3:20 pmHelsinki-Vantaa

Aug 20

HEL6:10 amHelsinki-Vantaa

25h 48m

2 stops

STL11:58 pmLambert-St Louis

$951

Scandinavian Airlines

Aug 13

STL3:39 pmLambert-St Louis

25h 51m

2 stops

HEL1:30 amHelsinki-Vantaa

Aug 20

HEL7:15 amHelsinki-Vantaa

24h 43m

3 stops

STL11:58 pmLambert-St Louis

$1,022

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Quickest round-trip

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Thu 8/20

4:54 pm-2:15 pm

1 stop13h 21m

Helsinki-Vantaa

Wed 9/2

4:25 pm-12:14 am

1 stop15h 49m

$839

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Thu 8/20

3:39 pm-3:20 pm

2 stops15h 41m

Helsinki-Vantaa

Wed 9/2

4:00 pm-11:58 pm

2 stops39h 58m

$852

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Thu 8/20

8:55 am-6:55 pm

2 stops26h 00m

Helsinki-Vantaa

Wed 9/2

6:35 am-1:25 pm

1 stop14h 50m

$866

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Thu 8/13

3:39 pm-3:20 pm

2 stops15h 41m

Helsinki-Vantaa

Thu 8/20

6:10 am-11:58 pm

2 stops25h 48m

$951

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Thu 8/13

9:32 am-2:15 pm

1 stop20h 43m

Helsinki-Vantaa

Thu 8/20

4:25 pm-12:14 am

1 stop15h 49m

$952

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Thu 8/13

1:25 pm-2:00 pm

2 stops16h 35m

Helsinki-Vantaa

Thu 8/20

4:25 pm-12:54 pm

1 stop28h 29m

$962

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Thu 8/13

4:54 pm-2:15 pm

1 stop13h 21m

Helsinki-Vantaa

Thu 8/20

12:30 pm-11:34 pm

2 stops19h 04m

$972

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Thu 8/13

3:39 pm-1:30 am

2 stops25h 51m

Helsinki-Vantaa

Thu 8/20

7:15 am-11:58 pm

3 stops24h 43m

$1,022

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Wed 12/23

5:45 pm-4:40 pm

2 stops14h 55m

Helsinki-Vantaa

Tue 12/29

6:40 am-4:50 pm

2 stops18h 10m

$1,094

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Wed 12/23

7:04 pm-1:00 pm

2 stops33h 56m

Helsinki-Vantaa

Tue 12/29

1:45 pm-1:45 pm

1 stop32h 00m

$1,124

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 16 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?

What is the cheapest month to fly to Helsinki?

The month of June is, on average, the cheapest month to fly to Helsinki from St. Louis, with most prices found around $0. If you aren’t able to travel during the month of June, then book flights to Helsinki from St. Louis during January instead. Flights to Helsinki in January, while not as cheap as those in June, still average around $0.

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

You could potentially save up to 19% 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	14h 55m
Direct flights	None

The fastest flight from St. Louis to Helsinki takes 14h 55m

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

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Frequently asked questions about flying from St. Louis to Helsinki

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. 14h 55m 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 July 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 62% of the total bookings. Other popular airlines include Finnair with 38%.

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 7.6 1,418 reviews		Search Finnair flights
American Airlines	PriceFrom $481	Free Cancellation	Rating 7.1 11,766 reviews		Search American Airlines flights

Vantaa

Espoo

Lahti

Kotka

Why use momondo?

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.