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 British Airways 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: 67% of momondo users choosing 1-stop flights on this route connected there.

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.

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.

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 is 1 operator available for flights from Lambert-St Louis Airport to Helsinki-Vantaa Airport as of May 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.

$412 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 low for flights on this route. Typical prices usually range from $782 to $649. The lowest price recently found on this route was $777.

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Find the cheapest flights from St. Louis to Helsinki

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

7:00 am - 11:10 am

STL

HEL

20h 10m

1 stop

12:30 pm - 7:30 pm

HEL

STL

15h 00m

1 stop

$777American Airlines

Sun, Nov 1 - Sat, Nov 14

2:08 pm - 1:55 pm

STL

HEL

15h 47m

2 stops

12:30 pm - 7:30 pm

HEL

STL

15h 00m

1 stop

$782American Airlines

Sun, Nov 1 - Sat, Nov 14

2:08 pm - 1:55 pm

STL

HEL

15h 47m

2 stops

12:30 pm - 11:56 pm

HEL

STL

19h 26m

2 stops

$785American Airlines

Sun, Nov 1 - Sat, Nov 14

3:39 pm - 4:40 pm

STL

HEL

17h 01m

2 stops

7:00 am - 4:52 pm

HEL

STL

17h 52m

2 stops

$946Multiple Airlines

Tue, Aug 4 - Tue, Aug 11

3:30 pm - 5:00 pm

STL

HEL

17h 30m

1 stop

6:35 am - 10:00 pm

HEL

STL

23h 25m

2 stops

$953Lufthansa

Tue, Aug 4 - Wed, Aug 12

5:58 pm - 2:15 pm

STL

HEL

12h 17m

1 stop

12:30 pm - 11:23 pm

HEL

STL

18h 53m

2 stops

$954American Airlines

Tue, Aug 4 - Tue, Aug 11

6:00 am - 6:55 pm

STL

HEL

28h 55m

2 stops

6:35 am - 11:44 pm

HEL

STL

25h 09m

2 stops

$1,011United Airlines

Thu, Jul 23 - Thu, Aug 6

1:13 pm - 6:55 pm

STL

HEL

21h 42m

2 stops

6:35 am - 12:11 pm

HEL

STL

37h 36m

2 stops

$1,017United Airlines

Thu, Jul 23 - Thu, Aug 6

7:06 am - 10:45 am

STL

HEL

19h 39m

1 stop

12:35 pm - 8:26 pm

HEL

STL

15h 51m

1 stop

$1,018American Airlines

Tue, Aug 4 - Tue, Aug 11

5:48 pm - 4:20 pm

STL

HEL

14h 32m

2 stops

12:30 pm - 11:23 pm

HEL

STL

18h 53m

2 stops

$1,035American Airlines

Thu, Jul 23 - Thu, Aug 6

American Airlines flights from St. Louis to Helsinki

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

American Airlines

Nov 1

STL7:00 amLambert-St Louis

20h 10m

1 stop

HEL11:10 amHelsinki-Vantaa

Nov 14

HEL12:30 pmHelsinki-Vantaa

15h 00m

1 stop

STL7:30 pmLambert-St Louis

$777

American Airlines

Nov 1

STL2:08 pmLambert-St Louis

15h 47m

2 stops

HEL1:55 pmHelsinki-Vantaa

Nov 14

HEL12:30 pmHelsinki-Vantaa

15h 00m

1 stop

STL7:30 pmLambert-St Louis

$782

American Airlines

Nov 1

STL2:08 pmLambert-St Louis

15h 47m

2 stops

HEL1:55 pmHelsinki-Vantaa

Nov 14

HEL12:30 pmHelsinki-Vantaa

19h 26m

2 stops

STL11:56 pmLambert-St Louis

$785

Lufthansa flights from St. Louis to Helsinki

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

Lufthansa

Aug 4

STL3:30 pmLambert-St Louis

17h 30m

1 stop

HEL5:00 pmHelsinki-Vantaa

Aug 12

HEL6:35 amHelsinki-Vantaa

23h 25m

2 stops

STL10:00 pmLambert-St Louis

$953

Lufthansa

Jul 1

STL1:13 pmLambert-St Louis

19h 57m

2 stops

HEL5:10 pmHelsinki-Vantaa

Jul 15

HEL6:35 amHelsinki-Vantaa

14h 50m

1 stop

STL1:25 pmLambert-St Louis

$1,142

Lufthansa

Jul 1

STL1:13 pmLambert-St Louis

19h 57m

2 stops

HEL5:10 pmHelsinki-Vantaa

Jul 15

HEL6:35 amHelsinki-Vantaa

14h 50m

1 stop

STL1:25 pmLambert-St Louis

$1,143

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Sun 11/1

7:00 am-11:10 am

1 stop20h 10m

Helsinki-Vantaa

Sat 11/14

12:30 pm-7:30 pm

1 stop15h 00m

$777

Quickest round-trip

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Sun 11/1

2:08 pm-1:55 pm

2 stops15h 47m

Helsinki-Vantaa

Sat 11/14

12:30 pm-7:30 pm

1 stop15h 00m

$782

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Sun 11/1

2:08 pm-1:55 pm

2 stops15h 47m

Helsinki-Vantaa

Sat 11/14

12:30 pm-11:56 pm

2 stops19h 26m

$785

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Tue 8/4

3:39 pm-4:40 pm

2 stops17h 01m

Helsinki-Vantaa

Tue 8/11

7:00 am-4:52 pm

2 stops17h 52m

$946

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Tue 8/4

3:30 pm-5:00 pm

1 stop17h 30m

Helsinki-Vantaa

Wed 8/12

6:35 am-10:00 pm

2 stops23h 25m

$953

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Tue 8/4

5:58 pm-2:15 pm

1 stop12h 17m

Helsinki-Vantaa

Tue 8/11

12:30 pm-11:23 pm

2 stops18h 53m

$954

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Thu 7/23

6:00 am-6:55 pm

2 stops28h 55m

Helsinki-Vantaa

Thu 8/6

6:35 am-11:44 pm

2 stops25h 09m

$1,011

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Thu 7/23

1:13 pm-6:55 pm

2 stops21h 42m

Helsinki-Vantaa

Thu 8/6

6:35 am-12:11 pm

2 stops37h 36m

$1,017

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Tue 8/4

7:06 am-10:45 am

1 stop19h 39m

Helsinki-Vantaa

Tue 8/11

12:35 pm-8:26 pm

1 stop15h 51m

$1,018

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Thu 7/23

5:48 pm-4:20 pm

2 stops14h 32m

Helsinki-Vantaa

Thu 8/6

12:30 pm-11:23 pm

2 stops18h 53m

$1,035

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 14 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 August 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 August, then book flights to Helsinki from St. Louis during January instead. Flights to Helsinki in January, while not as cheap as those in August, 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 28m
Direct flights	None

The fastest flight from St. Louis to Helsinki takes 14h 28m

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

Search flight deals

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 28m 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 is 1 operator available for flights from Lambert-St Louis Airport to Helsinki-Vantaa Airport as of May 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 100% of the total bookings.

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
American Airlines	PriceFrom $481	Free Cancellation	Rating 7.1 11,648 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.