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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 19 — Feb 261
Thu 2/19
Thu 2/26
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 20, 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 Finnair deal was found by Cheapflights users on 1/18. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/1811:22 am
STL
-
HEL
1 stop15h 48m
Finnair
Wed 2/2512:30 pm
HEL
-
STL
1 stop14h 59m
Finnair
Deal found 1/18$434
This Finnair 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/311:46 am
STL
-
HEL
2 stops25h 24m
Finnair
Mon 3/97:35 pm
HEL
-
STL
2 stops30h 54m
Finnair
Deal found 1/19$449
This United Airlines deal was found by Cheapflights users on 1/18. 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.
Wed 2/1811:25 am
STL
-
HEL
2 stops23h 25m
United Airlines
Wed 2/256:55 am
HEL
-
STL
2 stops22h 10m
United Airlines
Deal found 1/18$489
This United Airlines deal was found by Cheapflights users on 1/18. 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.
Thu 3/59:00 am
STL
-
HEL
2 stops30h 35m
United Airlines
Thu 3/121:55 pm
HEL
-
STL
2 stops32h 34m
United Airlines
Deal found 1/18$496
This American Airlines deal was found by Cheapflights users on 1/18. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/51:34 pm
STL
-
HEL
2 stops16h 21m
American Airlines
Thu 3/1212:30 pm
HEL
-
STL
1 stop17h 28m
American Airlines
Deal found 1/18$526
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

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 20, 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 20, 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 2/18

11:22 am-11:10 am

1 stop15h 48m

Helsinki-Vantaa

Wed 2/25

12:30 pm-7:29 pm

1 stop14h 59m

$434

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

Tue 3/3

11:46 am-9:10 pm

2 stops25h 24m

Helsinki-Vantaa

Mon 3/9

7:35 pm-7:29 pm

2 stops30h 54m

$449

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Wed 2/18

11:25 am-6:50 pm

2 stops23h 25m

Helsinki-Vantaa

Wed 2/25

6:55 am-9:05 pm

2 stops22h 10m

$489

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Thu 3/5

9:00 am-11:35 pm

2 stops30h 35m

Helsinki-Vantaa

Thu 3/12

1:55 pm-3:29 pm

2 stops32h 34m

$496

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Thu 3/5

1:34 pm-1:55 pm

2 stops16h 21m

Helsinki-Vantaa

Thu 3/12

12:30 pm-10:58 pm

1 stop17h 28m

$526

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Fri 2/6

6:30 am-1:05 pm

2 stops22h 35m

Helsinki-Vantaa

Tue 2/10

7:05 am-10:58 pm

2 stops23h 53m

$560

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/18

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 20, 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
11,164 reviews

Crew

8.0

Food

6.4

Comfort

7.2

Entertainment

6.9

Overall

7.2

Boarding

7.5

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
11,164 reviews
American Airlines
7.2
Good
11,164 reviews

Crew

8.0

Food

6.4

Comfort

7.2

Entertainment

6.9

Overall

7.2

Boarding

7.5

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 fly from St. Louis to Finland in about 15h 48m. The time it takes to get you to your destination can typically vary by up to . The distance from St. Louis to Finland is about 4678 mi.

  • 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 20, 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$484Average$668FlexibilityNo cancel feeOn-time71%

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