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.

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

British Airways and American Airlines are the most popular carriers operating from Lambert-St Louis to Helsinki-Vantaa

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.

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.

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.

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 October 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.

$467 Cheap Flights from St. Louis to Helsinki in 2026/27

Discover deals from 900+ travel sites with momondo.

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.

7:33 am - 6:45 pmSTL Lambert-St Louis-HEL Helsinki-Vantaa

27h 12m2 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

$725United Airlines

Sun, Feb 28 - Thu, Mar 4

9:22 am - 6:45 pmSTL Lambert-St Louis-HEL Helsinki-Vantaa

25h 23m2 stops Chicago O'Hare Intl Munich Franz Josef Strauss

12:35 pm - 12:06 pmHEL Helsinki-Vantaa-STL Lambert-St Louis

31h 31m2 stops Munich Franz Josef Strauss Chicago O'Hare Intl

$725United Airlines

Mon, Feb 8 - Thu, Feb 11

11:51 am - 1:35 amSTL Lambert-St Louis-HEL Helsinki-Vantaa

29h 44m2 stops Atlanta Hartsfield-Jackson Kastrup Copenhagen

6:15 am - 11:39 pmHEL Helsinki-Vantaa-STL Lambert-St Louis

25h 24m2 stops Kastrup Copenhagen Atlanta Hartsfield-Jackson

$749Scandinavian Airlines

Mon, Feb 8 - Thu, Feb 11

10:21 am - 11:40 amSTL Lambert-St Louis-HEL Helsinki-Vantaa

17h 19m1 stop Dallas/Fort Worth

12:30 pm - 8:17 pmHEL Helsinki-Vantaa-STL Lambert-St Louis

15h 47m1 stop Dallas/Fort Worth

$834American Airlines

Sun, Nov 15 - Sun, Nov 22

6:00 am - 11:40 amSTL Lambert-St Louis-HEL Helsinki-Vantaa

21h 40m1 stop Dallas/Fort Worth

12:30 pm - 9:59 pmHEL Helsinki-Vantaa-STL Lambert-St Louis

17h 29m1 stop Dallas/Fort Worth

$834American Airlines

Thu, Nov 12 - Thu, Nov 19

11:35 am - 1:55 pmSTL Lambert-St Louis-HEL Helsinki-Vantaa

18h 20m2 stops Chicago O'Hare Intl New York John F Kennedy Intl

12:30 pm - 8:17 pmHEL Helsinki-Vantaa-STL Lambert-St Louis

15h 47m1 stop Dallas/Fort Worth

$839American Airlines

Sun, Nov 15 - Sun, Nov 22

1:29 pm - 12:05 pmSTL Lambert-St Louis-HEL Helsinki-Vantaa

14h 36m2 stops Chicago O'Hare Intl Munich Franz Josef Strauss

7:05 am - 2:45 pmHEL Helsinki-Vantaa-STL Lambert-St Louis

14h 40m1 stop Frankfurt am Main

$968Lufthansa

Thu, Oct 22 - Fri, Oct 30

11:19 am - 11:50 amSTL Lambert-St Louis-HEL Helsinki-Vantaa

16h 31m1 stop Miami

1:25 pm - 9:51 pmHEL Helsinki-Vantaa-STL Lambert-St Louis

16h 26m1 stop Miami

$1,008Finnair

Sun, Feb 28 - Thu, Mar 4

11:19 am - 11:50 amSTL Lambert-St Louis-HEL Helsinki-Vantaa

16h 31m1 stop Miami

7:50 am - 7:41 pmHEL Helsinki-Vantaa-STL Lambert-St Louis

19h 51m2 stops London Heathrow Dallas/Fort Worth

$1,026Finnair

Sun, Feb 28 - Thu, Mar 4

12:53 pm - 11:40 amSTL Lambert-St Louis-HEL Helsinki-Vantaa

14h 47m1 stop Dallas/Fort Worth

12:30 pm - 7:41 pmHEL Helsinki-Vantaa-STL Lambert-St Louis

15h 11m1 stop Dallas/Fort Worth

$1,063Finnair

Mon, Feb 8 - Thu, Feb 11

Cheap last minute flights

Enter your travel dates to find the best prices.

1:29 pm - 12:05 pmSTL Lambert-St Louis-HEL Helsinki-Vantaa

14h 36m2 stops Chicago O'Hare Intl Munich Franz Josef Strauss

6:15 pm - 1:25 pmHEL Helsinki-Vantaa-STL Lambert-St Louis

27h 10m1 stop Frankfurt am Main

$951Lufthansa

Wed, Oct 7 - Mon, Oct 12

1:29 pm - 1:05 pmSTL Lambert-St Louis-HEL Helsinki-Vantaa

15h 36m2 stops Chicago O'Hare Intl Frankfurt am Main

7:40 pm - 1:25 pmHEL Helsinki-Vantaa-STL Lambert-St Louis

25h 45m2 stops Munich Franz Josef Strauss Frankfurt am Main

$957Lufthansa

Wed, Oct 7 - Mon, Oct 12

1:29 pm - 1:05 pmSTL Lambert-St Louis-HEL Helsinki-Vantaa

15h 36m2 stops Chicago O'Hare Intl Frankfurt am Main

7:40 pm - 1:25 pmHEL Helsinki-Vantaa-STL Lambert-St Louis

25h 45m2 stops Munich Franz Josef Strauss Frankfurt am Main

$958Lufthansa

Wed, Oct 7 - Mon, Oct 12

3:30 pm - 5:10 pmSTL Lambert-St Louis-HEL Helsinki-Vantaa

17h 40m1 stop Frankfurt am Main

7:40 pm - 1:25 pmHEL Helsinki-Vantaa-STL Lambert-St Louis

25h 45m2 stops Munich Franz Josef Strauss Frankfurt am Main

$960Lufthansa

Wed, Oct 7 - Mon, Oct 12

1:29 pm - 1:05 pmSTL Lambert-St Louis-HEL Helsinki-Vantaa

15h 36m2 stops Chicago O'Hare Intl Frankfurt am Main

6:15 pm - 1:25 pmHEL Helsinki-Vantaa-STL Lambert-St Louis

27h 10m1 stop Frankfurt am Main

$963Lufthansa

Wed, Oct 7 - Mon, Oct 12

3:30 pm - 5:10 pmSTL Lambert-St Louis-HEL Helsinki-Vantaa

17h 40m1 stop Frankfurt am Main

6:15 pm - 1:25 pmHEL Helsinki-Vantaa-STL Lambert-St Louis

27h 10m1 stop Frankfurt am Main

$964Lufthansa

Wed, Oct 7 - Mon, Oct 12

3:30 pm - 5:10 pmSTL Lambert-St Louis-HEL Helsinki-Vantaa

17h 40m1 stop Frankfurt am Main

1:50 pm - 1:25 pmHEL Helsinki-Vantaa-STL Lambert-St Louis

31h 35m1 stop Frankfurt am Main

$967Lufthansa

Wed, Oct 7 - Mon, Oct 12

6:32 am - 11:00 amSTL Lambert-St Louis-HEL Helsinki-Vantaa

20h 28m1 stop Dallas/Fort Worth

4:25 pm - 12:19 amHEL Helsinki-Vantaa-STL Lambert-St Louis

15h 54m1 stop Chicago O'Hare Intl

$976American Airlines

Wed, Oct 7 - Mon, Oct 12

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American Airlines flights from St. Louis to Helsinki

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

American Airlines

Nov 12

STL6:00 amLambert-St Louis

21h 40m

1 stop

HEL11:40 amHelsinki-Vantaa

Nov 19

HEL12:30 pmHelsinki-Vantaa

17h 29m

1 stop

STL9:59 pmLambert-St Louis

$834

American Airlines

Nov 12

STL11:35 amLambert-St Louis

18h 20m

2 stops

HEL1:55 pmHelsinki-Vantaa

Nov 19

HEL12:30 pmHelsinki-Vantaa

19h 05m

1 stop

STL11:35 pmLambert-St Louis

$839

American Airlines

Nov 12

STL1:20 pmLambert-St Louis

16h 35m

2 stops

HEL1:55 pmHelsinki-Vantaa

Nov 19

HEL12:30 pmHelsinki-Vantaa

17h 44m

2 stops

STL10:14 pmLambert-St Louis

$841

Delta flights from St. Louis to Helsinki

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

Delta

Oct 22

STL7:20 pmLambert-St Louis

14h 20m

2 stops

HEL5:40 pmHelsinki-Vantaa

Oct 30

HEL6:40 amHelsinki-Vantaa

23h 41m

2 stops

STL11:21 pmLambert-St Louis

$992

Delta

Oct 22

STL10:14 amLambert-St Louis

18h 51m

2 stops

HEL1:05 pmHelsinki-Vantaa

Oct 30

HEL6:40 amHelsinki-Vantaa

24h 14m

2 stops

STL11:54 pmLambert-St Louis

$993

Delta

Oct 12

STL10:35 amLambert-St Louis

22h 05m

2 stops

HEL4:40 pmHelsinki-Vantaa

Oct 16

HEL7:00 amHelsinki-Vantaa

21h 51m

2 stops

STL8:51 pmLambert-St Louis

$1,158

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 2/28

7:33 am-6:45 pm

2 stops27h 12m

Helsinki-Vantaa

Thu 3/4

12:35 pm-9:13 pm

2 stops16h 38m

$725

St. LouisHelsinki

STL Lambert-St Louis - HEL Helsinki-Vantaa

STLHEL

Lambert-St Louis

Mon 2/8

9:22 am-6:45 pm

2 stops25h 23m

Helsinki-Vantaa

Thu 2/11

12:35 pm-12:06 pm

2 stops31h 31m

$725

St. LouisHelsinki

STL Lambert-St Louis - HEL Helsinki-Vantaa

STLHEL

Lambert-St Louis

Mon 2/8

11:51 am-1:35 am

2 stops29h 44m

Helsinki-Vantaa

Thu 2/11

6:15 am-11:39 pm

2 stops25h 24m

$749

St. LouisHelsinki

STL Lambert-St Louis - HEL Helsinki-Vantaa

STLHEL

Lambert-St Louis

Sun 11/15

10:21 am-11:40 am

1 stop17h 19m

Helsinki-Vantaa

Sun 11/22

12:30 pm-8:17 pm

1 stop15h 47m

$834

St. LouisHelsinki

STL Lambert-St Louis - HEL Helsinki-Vantaa

STLHEL

Lambert-St Louis

Thu 11/12

6:00 am-11:40 am

1 stop21h 40m

Helsinki-Vantaa

Thu 11/19

12:30 pm-9:59 pm

1 stop17h 29m

$834

St. LouisHelsinki

STL Lambert-St Louis - HEL Helsinki-Vantaa

STLHEL

Lambert-St Louis

Sun 11/15

11:35 am-1:55 pm

2 stops18h 20m

Helsinki-Vantaa

Sun 11/22

12:30 pm-8:17 pm

1 stop15h 47m

$839

Quickest round-trip

St. LouisHelsinki

STL Lambert-St Louis - HEL Helsinki-Vantaa

STLHEL

Lambert-St Louis

Thu 10/22

1:29 pm-12:05 pm

2 stops14h 36m

Helsinki-Vantaa

Fri 10/30

7:05 am-2:45 pm

1 stop14h 40m

$968

St. LouisHelsinki

STL Lambert-St Louis - HEL Helsinki-Vantaa

STLHEL

Lambert-St Louis

Sun 2/28

11:19 am-11:50 am

1 stop16h 31m

Helsinki-Vantaa

Thu 3/4

1:25 pm-9:51 pm

1 stop16h 26m

$1,008

St. LouisHelsinki

STL Lambert-St Louis - HEL Helsinki-Vantaa

STLHEL

Lambert-St Louis

Sun 2/28

11:19 am-11:50 am

1 stop16h 31m

Helsinki-Vantaa

Thu 3/4

7:50 am-7:41 pm

2 stops19h 51m

$1,026

St. LouisHelsinki

STL Lambert-St Louis - HEL Helsinki-Vantaa

STLHEL

Lambert-St Louis

Mon 2/8

12:53 pm-11:40 am

1 stop14h 47m

Helsinki-Vantaa

Thu 2/11

12:30 pm-7:41 pm

1 stop15h 11m

$1,063

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 17 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?

Prices are currently low for flights on this route.

Typical prices usually range from $727 to $996.
The lowest price recently found on this route was $725.

What is the cheapest month to fly to Helsinki?

The month of January 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 January, then book flights to Helsinki from St. Louis during February instead. Flights to Helsinki in February, while not as cheap as those in January, still average around $559.

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

You could potentially save up to 10% 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

Best Price Found	$467
Fastest flight time	14h 14m
Direct flights	None

The best one-way flight to Helsinki from St. Louis in the past 72 hours is $467. The best round-trip flight deal from St. Louis to Helsinki found on momondo in the last 72 hours is $725.

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

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 14m 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 October 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 57% of the total bookings. Other popular airlines include Finnair with 43%.

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 1,431 reviews		Search Finnair flights
American Airlines	PriceFrom $484	Free Cancellation	Rating 7.0 12,124 reviews		Search American Airlines flights

Vantaa

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Lahti

Kotka

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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.

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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.

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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.