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

Flights connecting via Frankfurt am Main (FRA) have the shortest average one-way travel time: 13h 48m.

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

Flights via Frankfurt am Main (FRA) offer the lowest average round-trip price of $711.

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 February 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.

$475 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 $483 to $611. The lowest price recently found on this route was $475.

1 adult

0 bags

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

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.

7:05 am - 2:00 pm

STL

HEL

22h 55m

1 stop

12:35 pm - 11:46 pm

HEL

STL

19h 11m

2 stops

$475Multiple Airlines

Mon, Mar 30 - Tue, Apr 14

11:22 am - 11:10 am

STL

HEL

16h 48m

1 stop

12:45 pm - 11:58 pm

HEL

STL

18h 13m

1 stop

$484Finnair

Mon, Mar 9 - Mon, Mar 16

7:00 pm - 6:50 pm

STL

HEL

16h 50m

2 stops

6:55 am - 6:00 pm

HEL

STL

42h 05m

2 stops

$487Lufthansa

Mon, Mar 9 - Mon, Mar 16

11:46 am - 10:45 am

STL

HEL

15h 59m

1 stop

12:30 pm - 11:44 pm

HEL

STL

18h 14m

2 stops

$489American Airlines

Mon, Mar 9 - Mon, Mar 16

7:00 pm - 6:50 pm

STL

HEL

16h 50m

2 stops

7:35 pm - 10:59 pm

HEL

STL

34h 24m

2 stops

$517Lufthansa

Tue, Mar 17 - Tue, Mar 24

7:00 pm - 1:20 am

STL

HEL

23h 20m

2 stops

7:35 pm - 10:59 pm

HEL

STL

34h 24m

2 stops

$530Lufthansa

Mon, Mar 16 - Tue, Mar 24

6:33 pm - 2:15 pm

STL

HEL

11h 42m

1 stop

4:25 pm - 11:46 pm

HEL

STL

15h 21m

1 stop

$534American Airlines

Sat, Apr 4 - Wed, Apr 15

3:30 pm - 6:55 pm

STL

HEL

19h 25m

2 stops

6:35 am - 9:08 pm

HEL

STL

22h 33m

2 stops

$537Lufthansa

Wed, Apr 1 - Wed, Apr 8

8:00 am - 2:15 pm

STL

HEL

22h 15m

1 stop

12:35 pm - 10:17 pm

HEL

STL

17h 42m

2 stops

$539American Airlines

Sat, Apr 4 - Wed, Apr 15

11:46 am - 7:00 pm

STL

HEL

23h 14m

2 stops

12:35 pm - 11:46 pm

HEL

STL

19h 11m

2 stops

$541Multiple Airlines

Mon, Mar 30 - Tue, Apr 14

Finnair flights from St. Louis to Helsinki

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

Finnair

Mar 9

STL11:22 amLambert-St Louis

16h 48m

1 stop

HEL11:10 amHelsinki-Vantaa

Mar 16

HEL12:45 pmHelsinki-Vantaa

18h 13m

1 stop

STL11:58 pmLambert-St Louis

$484

Finnair

Mar 23

STL11:22 amLambert-St Louis

16h 48m

1 stop

HEL11:10 amHelsinki-Vantaa

Apr 2

HEL4:25 pmHelsinki-Vantaa

12h 46m

1 stop

STL9:11 pmLambert-St Louis

$707

Finnair

Mar 24

STL11:46 amLambert-St Louis

15h 59m

1 stop

HEL10:45 amHelsinki-Vantaa

Apr 2

HEL4:25 pmHelsinki-Vantaa

12h 46m

1 stop

STL9:11 pmLambert-St Louis

$713

Lufthansa flights from St. Louis to Helsinki

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

Lufthansa

Mar 9

STL7:00 pmLambert-St Louis

16h 50m

2 stops

HEL6:50 pmHelsinki-Vantaa

Mar 16

HEL6:55 amHelsinki-Vantaa

42h 05m

2 stops

STL6:00 pmLambert-St Louis

$487

Lufthansa

Mar 17

STL7:00 pmLambert-St Louis

16h 50m

2 stops

HEL6:50 pmHelsinki-Vantaa

Mar 24

HEL7:35 pmHelsinki-Vantaa

34h 24m

2 stops

STL10:59 pmLambert-St Louis

$517

Lufthansa

Mar 16

STL7:00 pmLambert-St Louis

23h 20m

2 stops

HEL1:20 amHelsinki-Vantaa

Mar 24

HEL7:35 pmHelsinki-Vantaa

34h 24m

2 stops

STL10:59 pmLambert-St Louis

$530

Fly from

Fly to

Route

Depart

Return

Price

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Mon 3/30

7:05 am-2:00 pm

1 stop22h 55m

Helsinki-Vantaa

Tue 4/14

12:35 pm-11:46 pm

2 stops19h 11m

$475

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Mon 3/9

11:22 am-11:10 am

1 stop16h 48m

Helsinki-Vantaa

Mon 3/16

12:45 pm-11:58 pm

1 stop18h 13m

$484

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Mon 3/9

7:00 pm-6:50 pm

2 stops16h 50m

Helsinki-Vantaa

Mon 3/16

6:55 am-6:00 pm

2 stops42h 05m

$487

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Mon 3/9

11:46 am-10:45 am

1 stop15h 59m

Helsinki-Vantaa

Mon 3/16

12:30 pm-11:44 pm

2 stops18h 14m

$489

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Tue 3/17

7:00 pm-6:50 pm

2 stops16h 50m

Helsinki-Vantaa

Tue 3/24

7:35 pm-10:59 pm

2 stops34h 24m

$517

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Mon 3/16

7:00 pm-1:20 am

2 stops23h 20m

Helsinki-Vantaa

Tue 3/24

7:35 pm-10:59 pm

2 stops34h 24m

$530

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Sat 4/4

6:33 pm-2:15 pm

1 stop11h 42m

Helsinki-Vantaa

Wed 4/15

4:25 pm-11:46 pm

1 stop15h 21m

$534

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Wed 4/1

3:30 pm-6:55 pm

2 stops19h 25m

Helsinki-Vantaa

Wed 4/8

6:35 am-9:08 pm

2 stops22h 33m

$537

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Sat 4/4

8:00 am-2:15 pm

1 stop22h 15m

Helsinki-Vantaa

Wed 4/15

12:35 pm-10:17 pm

2 stops17h 42m

$539

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Mon 3/30

11:46 am-7:00 pm

2 stops23h 14m

Helsinki-Vantaa

Tue 4/14

12:35 pm-11:46 pm

2 stops19h 11m

$541

Flights are sorted by cheapest round-trip flights first.

Sorted 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

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	12h 54m
Direct flights	None

The fastest flight from St. Louis to Helsinki takes 12h 54m

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. 12h 54m 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 February 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 $484	Free Cancellation	Rating 7.2 11,275 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?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from St. Louis to Helsinki. Millions of users trust and use momondo every year so you are in good hands.

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.