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Finland

$420+ Cheap flights from St. Louis (STL) to Finland

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 3/11. Fares are subject to change and may not be available on all flights or dates of travel.
STL — HEL
Feb 20 — Feb 271
Fri 2/20
Fri 2/27
1 adult, Economy
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Cheap flight deals from St. Louis to Finland

Cheapest flights from St. Louis to Finland
Explore the most affordable flight options available from St. Louis to Finland. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 21, 2026.

This Flysmarter deal was found by Cheapflights users on 1/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Flysmarter is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/1111:22 am
STL
-
HEL
1 stop16h 48m
Finnair
Wed 3/1812:45 pm
HEL
-
STL
1 stop18h 13m
Finnair
Deal found 1/20$420
This Expedia deal was found by Cheapflights users on 1/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/115:59 pm
STL
-
HEL
2 stops16h 26m
Multiple Airlines
Wed 3/182:05 pm
HEL
-
STL
2 stops16h 53m
Multiple Airlines
Deal found 1/20$552
This United Airlines deal was found by Cheapflights users on 1/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/69:57 am
STL
-
HEL
2 stops19h 08m
United Airlines
Tue 2/107:05 am
HEL
-
STL
2 stops37h 24m
United Airlines
Deal found 1/19$560
This Flysmarter deal was found by Cheapflights users on 1/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Flysmarter is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/611:46 am
STL
-
HEL
2 stops19h 14m
Finnair
Fri 3/1312:30 pm
HEL
-
STL
1 stop13h 59m
Finnair
Deal found 1/20$851
This Mytrip deal was found by Cheapflights users on 1/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/21:00 pm
STL
-
HEL
2 stops21h 55m
Multiple Airlines
Tue 6/166:00 am
HEL
-
STL
2 stops15h 25m
Multiple Airlines
Deal found 1/21$863
This oojo deal was found by Cheapflights users on 1/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/15:00 pm
STL
-
HEL
2 stops22h 00m
British Airways
Wed 7/157:20 am
HEL
-
STL
2 stops20h 10m
British Airways
Deal found 1/20$889
This FlightHub deal was found by Cheapflights users on 1/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/303:30 pm
STL
-
HEL
1 stop17h 30m
Lufthansa
Tue 7/146:00 am
HEL
-
STL
2 stops15h 25m
Lufthansa
Deal found 1/21$891
This oojo deal was found by Cheapflights users on 1/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/305:00 pm
STL
-
HEL
2 stops22h 00m
British Airways
Tue 7/147:30 pm
HEL
-
STL
2 stops29h 50m
British Airways
Deal found 1/21$898

Find flight deals from St. Louis to Finland

Keep the following information in mind while searching for St. Louis to Finland flight deals. Data was last updated January 21, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

Expedia
3 stars

Round-trip from

$420
(Flysmarter)

Popular in

May

Cheapest in

February
Provider with most accurate pricing for Lambert-St Louis-Helsinki-Vantaa flight deals.
Search Deals
Provider most trusted by Cheapflights users for Lambert-St Louis-Helsinki-Vantaa flights.
Search Deals
From Lambert-St Louis to Finland
Search Deals
Highest demand for flights based on searches. 20% potential increase in price ($226 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease ($58 potential savings vs. average RT price).
Search Deals

Cheapflights 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, Cheapflights users made 2,558,603 searches. Data last updated January 21, 2026.
Use the filters below to find and compare flights from St. Louis to Finland that are best for you.

Fly from

St. Louis

Fly to

Finland

Route

Depart

Return

Price

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Wed 3/11

11:22 am-11:10 am

1 stop16h 48m

Helsinki-Vantaa

Wed 3/18

7:50 am-11:58 pm

2 stops23h 08m

$439

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Fri 2/6

9:57 am-1:05 pm

2 stops19h 08m

Helsinki-Vantaa

Tue 2/10

7:05 am-12:29 pm

2 stops37h 24m

$560

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Tue 6/2

1:00 pm-6:55 pm

2 stops21h 55m

Helsinki-Vantaa

Tue 6/16

6:00 am-1:25 pm

2 stops15h 25m

$863

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Wed 7/1

5:00 pm-11:00 pm

2 stops22h 00m

Helsinki-Vantaa

Wed 7/15

7:20 am-7:30 pm

2 stops20h 10m

$889

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Tue 6/30

3:30 pm-5:00 pm

1 stop17h 30m

Helsinki-Vantaa

Tue 7/14

6:00 am-1:25 pm

2 stops15h 25m

$891

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Mon 2/2

3:45 pm-3:25 pm

2 stops15h 40m

Helsinki-Vantaa

Fri 2/6

11:20 am-11:37 pm

2 stops20h 17m

$900

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Tue 6/2

5:46 pm-3:00 pm

2 stops13h 14m

Helsinki-Vantaa

Tue 6/16

4:25 pm-11:42 pm

1 stop15h 17m

$912

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Thu 6/18

7:25 am-6:55 pm

2 stops27h 30m

$490

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Thu 6/18

2:18 pm-3:15 pm

3 stops40h 57m

$673

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Thu 6/18

5:00 pm-2:15 pm

1 stop13h 15m

$874

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/21

Best time to book a flight from St. Louis to Finland

Have a flexible travel schedule? Discover the best time to fly to Finland from St. Louis with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from St. Louis to Finland
No data available for this route at this time. Please check back soon.

Reviews of airlines servicing Finland

Get insights into the airlines that provide service to Finland. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Finland. Reviews last updated January 21, 2026.
Peruse reviews from past customers who have flown with American Airlines from St. Louis to Finland to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
American Airlines
7.2
Good
11,169 reviews

Food

6.4

Crew

8.0

Overall

7.2

Comfort

7.2

Boarding

7.5

Entertainment

6.9

Reviews

1 / 20
2.0
Mediocre

Susie,Jan 2026

CLT - TPA

This flight was delayed 3 or 4 times. We had boarded the plane, sat on plane for a good 30 minutes, then we had to board the aircraft, walk to a different gate, wait and then board another aircraft. We arrived in Tampa 4 hours later than the original booking. I feel there should have been some sort of compensation especially for the advantage members.
American Airlines
7.2
Good
11,169 reviews
American Airlines
7.2
Good
11,169 reviews

Food

6.4

Crew

8.0

Overall

7.2

Comfort

7.2

Boarding

7.5

Entertainment

6.9

Reviews

1 / 20
2.0
Mediocre

Susie,Jan 2026

CLT - TPA

This flight was delayed 3 or 4 times. We had boarded the plane, sat on plane for a good 30 minutes, then we had to board the aircraft, walk to a different gate, wait and then board another aircraft. We arrived in Tampa 4 hours later than the original booking. I feel there should have been some sort of compensation especially for the advantage members.

Related info for your journey

Find useful and relevant information for your journey from St. Louis to Finland. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from St. Louis to Finland?

    For a flight from St. Louis to Finland, you will be flying from Lambert-St Louis. Lambert-St Louis (STL) is just 12.7 mi from the center of the city.

  • How long is the flight from St. Louis to Finland?

    Airlines like Finnair and United Airlines fly from St. Louis to Finland in about 16h 48m. The time it takes to get you to your destination can typically vary by up to 2h 20m. The distance from St. Louis to Finland is about 4678 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • Can I find deals for flights from St. Louis to Finland that include hotel bookings?

    Yes. In addition to deals on St. Louis to Finland flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from St. Louis to Finland?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to Finland.

  • Can I find deals for business class flights from St. Louis to Finland?

    Yes. Cheapflights offers flight deals from St. Louis to Finland by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

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Alternative routes for St. Louis to Finland

See prices for flight routes from nearby airports that may be better suited for you.
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Top airline flying from St. Louis to Finland

Discover the top airline that operate flights from St. Louis to Finland. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated January 21, 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$484Average$668FlexibilityNo cancel feeOn-time71%

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