Finland

$470+ 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 3/30. Fares are subject to change and may not be available on all flights or dates of travel.
STL — HEL
Mar 18 — Mar 251
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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 February 16, 2026.

This Travelis deal was found by Cheapflights users on 2/14. 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 Travelis is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/3011:22 am
STL
-
HEL
1 stop16h 28m
Finnair
Tue 4/1412:35 pm
HEL
-
STL
1 stop14h 55m
Finnair
Deal found 2/14$470
This Finnair deal was found by Cheapflights users on 2/12. 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.
Mon 3/307:05 am
STL
-
HEL
1 stop22h 55m
Multiple Airlines
Tue 4/1412:35 pm
HEL
-
STL
2 stops19h 11m
Multiple Airlines
Deal found 2/12$475
This American Airlines deal was found by Cheapflights users on 2/14. 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.
Tue 3/317:00 am
STL
-
HEL
1 stop19h 45m
American Airlines
Tue 4/712:35 pm
HEL
-
STL
1 stop18h 24m
American Airlines
Deal found 2/14$476
This Expedia deal was found by Cheapflights users on 2/14. 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.
Tue 3/316:35 pm
STL
-
HEL
2 stops16h 20m
Lufthansa
Tue 4/76:00 am
HEL
-
STL
2 stops23h 08m
Lufthansa
Deal found 2/14$493
This KLM deal was found by Cheapflights users on 2/14. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/305:25 pm
STL
-
HEL
2 stops16h 15m
KLM
Tue 4/147:00 am
HEL
-
STL
2 stops21h 42m
KLM
Deal found 2/14$495
This United Airlines deal was found by Cheapflights users on 2/14. 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.
Tue 3/3110:00 am
STL
-
HEL
2 stops24h 55m
United Airlines
Tue 4/77:05 am
HEL
-
STL
2 stops33h 20m
United Airlines
Deal found 2/14$500
This United Airlines deal was found by Cheapflights users on 2/12. 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.
Tue 10/136:49 pm
STL
-
HEL
2 stops16h 06m
United Airlines
Tue 10/207:05 am
HEL
-
STL
1 stop14h 20m
United Airlines
Deal found 2/12$513
This Air Canada deal was found by Cheapflights users on 2/12. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/1112:10 pm
STL
-
HEL
2 stops22h 45m
Air Canada
Tue 10/207:05 am
HEL
-
STL
2 stops19h 36m
Air Canada
Deal found 2/12$516
This Air Canada deal was found by Cheapflights users on 2/12. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/122:40 pm
STL
-
HEL
2 stops20h 15m
Air Canada
Tue 10/207:05 am
HEL
-
STL
2 stops19h 36m
Air Canada
Deal found 2/12$520
This Delta deal was found by Cheapflights users on 2/12. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/132:18 pm
STL
-
HEL
2 stops18h 22m
Delta
Tue 10/201:55 pm
HEL
-
STL
2 stops26h 57m
Delta
Deal found 2/12$521
This KAYAK deal was found by Cheapflights users on 2/12. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/126:49 pm
STL
-
HEL
2 stops22h 46m
Lufthansa
Tue 10/207:05 am
HEL
-
STL
1 stop14h 20m
Lufthansa
Deal found 2/12$523

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 February 16, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$470
(Travelis)

Popular in

July

Cheapest in

February

Average price

$554
Provider with most accurate pricing for Lambert-St Louis-Helsinki-Vantaa flight deals.
Provider most trusted by Cheapflights users for Lambert-St Louis-Helsinki-Vantaa flights.
From Lambert-St Louis to Finland
Highest demand for flights based on searches. 26% potential increase in price ($292 potential increase over avg. RT price).
Cheapest flight prices on average. 3% potential price decrease ($30 potential savings vs. average RT price).
Average for round-trip flights in February 2026

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 February 16, 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

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

Tue 3/31

2:06 pm-2:00 pm

2 stops15h 54m

Helsinki-Vantaa

Tue 4/7

12:35 pm-11:37 am

1 stop31h 02m

$476

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Mon 3/30

5:25 pm-5:40 pm

2 stops16h 15m

Helsinki-Vantaa

Tue 4/14

7:00 am-8:42 pm

2 stops21h 42m

$495

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Tue 3/31

10:00 am-6:55 pm

2 stops24h 55m

Helsinki-Vantaa

Tue 4/7

7:05 am-8:25 am

2 stops33h 20m

$500

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Wed 3/25

1:34 pm-1:55 pm

2 stops17h 21m

Helsinki-Vantaa

Sat 4/4

1:25 pm-11:58 pm

1 stop18h 33m

$582

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Wed 3/25

5:55 pm-11:35 pm

2 stops22h 40m

Helsinki-Vantaa

Sat 4/4

6:45 am-10:28 pm

2 stops23h 43m

$627

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Tue 3/31

7:45 am-1:10 pm

3 stops21h 25m

Helsinki-Vantaa

Tue 4/7

6:10 am-3:24 pm

2 stops41h 14m

$635

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Tue 3/3

4:49 pm-6:50 pm

2 stops18h 01m

Helsinki-Vantaa

Tue 3/10

12:45 pm-10:59 pm

2 stops17h 14m

$689

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Tue 3/3

8:30 am-6:50 pm

2 stops26h 20m

Helsinki-Vantaa

Tue 3/10

7:05 am-3:29 pm

2 stops39h 24m

$698

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Fri 2/20

7:00 am-4:25 pm

2 stops25h 25m

$580

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/15

Showing 1-10 of 12 results
1
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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 February 16, 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.

Entertainment

6.9

Boarding

7.5

Comfort

7.2

Overall

7.2

Crew

8.0

Food

6.4

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.

Entertainment

6.9

Boarding

7.5

Comfort

7.2

Overall

7.2

Crew

8.0

Food

6.4

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 American Airlines, KLM, and United Airlines fly from St. Louis to Finland in about 15h 54m. The time it takes to get you to your destination can typically vary by up to 9h 01m. 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.

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 February 16, 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$484Average$668FlexibilityNo cancel feeOn-time71%

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