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Cheap flights from St. Louis to Finland from $471

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Finland departing on 12/1. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Find the cheapest flights from St. Louis to Finland

Cheap round-trip flights

Enter your travel dates to find the best prices.
Delta Logo
6:09 pm - 4:25 pmSTL-HEL
14h 16m2 stops
Delta Logo
6:30 am - 12:57 pmHEL-STL
38h 27m2 stops
$471Delta
Find Deal
Mon, Dec 1 - Tue, Dec 16
Air Canada Logo
4:05 pm - 4:30 pmSTL-HEL
40h 25m2 stops
Air Canada Logo
12:45 pm - 3:29 pmHEL-STL
58h 44m2 stops
$495Air Canada
Find Deal
Mon, Dec 8 - Mon, Dec 15
Scandinavian Airlines Logo
1:00 pm - 3:25 pmSTL-HEL
18h 25m2 stops
Scandinavian Airlines Logo
6:15 am - 11:40 pmHEL-STL
25h 25m2 stops
$510Scandinavian Airlines
Find Deal
Sat, Feb 21 - Sat, Feb 28
Finnair Logo
11:54 am - 10:45 amSTL-HEL
14h 51m1 stop
Finnair Logo
12:30 pm - 6:19 pmHEL-STL
13h 49m1 stop
$525Finnair
Find Deal
Sat, Feb 21 - Sat, Feb 28
American Airlines Logo
5:10 am - 11:10 amSTL-HEL
22h 00m1 stop
American Airlines Logo
7:50 am - 6:43 pmHEL-STL
18h 53m2 stops
$526American Airlines
Find Deal
Mon, Dec 8 - Mon, Dec 15
Scandinavian Airlines Logo
1:00 pm - 11:55 pmSTL-HEL
26h 55m3 stops
Scandinavian Airlines Logo
6:15 am - 11:40 pmHEL-STL
25h 25m2 stops
$530Scandinavian Airlines
Find Deal
Sat, Feb 21 - Sat, Feb 28
American Airlines Logo
9:35 am - 10:45 amSTL-HEL
17h 10m1 stop
American Airlines Logo
12:30 pm - 9:44 pmHEL-STL
17h 14m2 stops
$537American Airlines
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Sat, Feb 21 - Sat, Feb 28
Multiple Airlines Logo
6:30 am - 1:10 pmSTL-HEL
22h 40m2 stops
Multiple Airlines Logo
6:55 am - 10:50 pmHEL-STL
23h 55m2 stops
$550Multiple Airlines
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Sun, Mar 1 - Sun, Mar 8
Finnair Logo
11:07 am - 11:10 amSTL-HEL
16h 03m1 stop
Finnair Logo
8:30 pm - 7:29 pmHEL-STL
30h 59m2 stops
$823Finnair
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Mon, Dec 1 - Tue, Dec 16
Multiple Airlines Logo
4:05 pm - 1:10 pmSTL-HEL
37h 05m2 stops
Multiple Airlines Logo
6:15 am - 4:50 pmHEL-STL
18h 35m3 stops
$1,440Multiple Airlines
Find Deal
Mon, Dec 1 - Tue, Dec 16

Scandinavian Airlines flights from St. Louis to Finland

Our best Scandinavian Airlines deals on St. Louis to Finland flight tickets
Scandinavian Airlines
Feb 21
STL1:00 pmLambert-St Louis
18h 25m
2 stops
HEL3:25 pmHelsinki-Vantaa
Feb 28
HEL6:15 amHelsinki-Vantaa
25h 25m
2 stops
STL11:40 pmLambert-St Louis
$510
Find similar
Scandinavian Airlines
Feb 21
STL1:00 pmLambert-St Louis
26h 55m
3 stops
HEL11:55 pmHelsinki-Vantaa
Feb 28
HEL6:15 amHelsinki-Vantaa
25h 25m
2 stops
STL11:40 pmLambert-St Louis
$530
Find similar
Scandinavian Airlines
Dec 8
STL11:40 amLambert-St Louis
24h 40m
3 stops
HEL8:20 pmHelsinki-Vantaa
Dec 15
HEL6:15 amHelsinki-Vantaa
22h 47m
2 stops
STL9:02 pmLambert-St Louis
$701
Find similar

Finnair flights from St. Louis to Finland

Our best Finnair deals on St. Louis to Finland flight tickets
Finnair
Feb 21
STL11:54 amLambert-St Louis
14h 51m
1 stop
HEL10:45 amHelsinki-Vantaa
Feb 28
HEL12:30 pmHelsinki-Vantaa
13h 49m
1 stop
STL6:19 pmLambert-St Louis
$525
Find similar
Finnair
Dec 1
STL11:07 amLambert-St Louis
16h 03m
1 stop
HEL11:10 amHelsinki-Vantaa
Dec 16
HEL8:30 pmHelsinki-Vantaa
30h 59m
2 stops
STL7:29 pmLambert-St Louis
$823
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from St. Louis to Finland that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated October 23, 2025.
Use the filters below to find and compare flights from St. Louis to Finland that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Mon 12/1

6:09 pm-4:25 pm

2 stops14h 16m

Helsinki-Vantaa

Tue 12/16

6:30 am-12:57 pm

2 stops38h 27m

$471

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Mon 12/8

4:05 pm-4:30 pm

2 stops40h 25m

Helsinki-Vantaa

Mon 12/15

12:45 pm-3:29 pm

2 stops58h 44m

$495

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Sat 2/21

1:00 pm-3:25 pm

2 stops18h 25m

Helsinki-Vantaa

Sat 2/28

6:15 am-11:40 pm

2 stops25h 25m

$510

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Sat 2/21

11:54 am-10:45 am

1 stop14h 51m

Helsinki-Vantaa

Sat 2/28

12:30 pm-6:19 pm

1 stop13h 49m

$525

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Mon 12/8

5:10 am-11:10 am

1 stop22h 00m

Helsinki-Vantaa

Mon 12/15

7:50 am-6:43 pm

2 stops18h 53m

$526

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Sat 2/21

1:00 pm-11:55 pm

3 stops26h 55m

Helsinki-Vantaa

Sat 2/28

6:15 am-11:40 pm

2 stops25h 25m

$530

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Sat 2/21

9:35 am-10:45 am

1 stop17h 10m

Helsinki-Vantaa

Sat 2/28

12:30 pm-9:44 pm

2 stops17h 14m

$537

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Sun 3/1

6:30 am-1:10 pm

2 stops22h 40m

Helsinki-Vantaa

Sun 3/8

6:55 am-10:50 pm

2 stops23h 55m

$550

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Mon 12/1

11:07 am-11:10 am

1 stop16h 03m

Helsinki-Vantaa

Tue 12/16

8:30 pm-7:29 pm

2 stops30h 59m

$823

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Mon 12/1

4:05 pm-1:10 pm

2 stops37h 05m

Helsinki-Vantaa

Tue 12/16

6:15 am-4:50 pm

3 stops18h 35m

$1,440

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

See travel insights to Finland from

How to get the cheapest flight ticket from St. Louis to Finland

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

What is the cheapest month to fly to Finland?

If you don’t want to visit Finland in November, then you should wait until April to fly from St. Louis, when ticket prices are also cheap, with an average price of $668.

What is the cheapest day to depart on your flight to Finland?

The cheapest day to depart from St. Louis to Finland is on a Tuesday. Travelers who choose to depart for Finland on a Tuesday will often find tickets for as low as $511. Be sure to avoid booking your departure on a Wednesday as prices are generally higher than usual. According to our data, the average ticket price to Finland on Wednesday is $1,482.

What is the cheapest time of day to depart on your flight to Finland?

The cheapest time of day to fly to Finland is in the morning when flights can be purchased for as low as $706. In contrast, the most expensive time of day to depart to Finland is at noon when prices are around $1,476.

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

You could potentially save up to 23% on your flight if you consider stops on a St. Louis to Finland flight.

Cheap St. Louis to Finland flight deals and tips

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

Direct flights

None
There are no direct flights from St. Louis to Finland. There are no popular flight routes from St. Louis to Finland.
Search flight deals

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

    Prices for flights from Lambert-St Louis Airport to Finland are refreshed on a daily basis.

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

  • How old do you have to be to fly from Lambert-St Louis Airport to Finland?

    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 Finland.

  • What documentation or ID do you need to fly to Finland?

    The travel and health documents you'll need for your trip to Finland may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Finland. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Best airlines flying from St. Louis to Finland

Compare and see reviews for airlines that fly from St. Louis to Finland with momondo
Airline
Rating
Free Cancellation
Price
American AirlinesPriceFrom $490Free CancellationRating
7.2
11,033 reviews
Search American Airlines flights

Why use momondo?

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

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Finland from St. Louis.

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

Yes. momondo allows you to filter the results for St. Louis to Finland flights to just show those with flexible booking policies.

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

momondo helps you find the best flight between St. Louis and Finland by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

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

If you are not ready to book a flight from St. Louis to Finland now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Finland and let you know when they change.

An easier way to manage your Finland trip

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