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$484+ 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 4/1. Fares are subject to change and may not be available on all flights or dates of travel.
STL — HEL
Feb 28 — Mar 71
Sat 2/28
Sat 3/7
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 29, 2026.

This Finnair deal was found by Cheapflights users on 1/28. 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 4/16:00 am
STL
-
HEL
1 stop24h 15m
Multiple Airlines
Wed 4/84:25 pm
HEL
-
STL
1 stop23h 58m
Multiple Airlines
Deal found 1/28$484
This American Airlines deal was found by Cheapflights users on 1/28. 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.
Wed 4/11:39 pm
STL
-
HEL
2 stops16h 21m
American Airlines
Wed 4/84:25 pm
HEL
-
STL
1 stop13h 49m
American Airlines
Deal found 1/28$489
This United Airlines deal was found by Cheapflights users on 1/28. 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 4/18:54 am
STL
-
HEL
2 stops26h 01m
United Airlines
Wed 4/81:55 pm
HEL
-
STL
2 stops17h 01m
United Airlines
Deal found 1/28$500
This American Airlines deal was found by Cheapflights users on 1/28. 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 4/211:46 am
STL
-
HEL
1 stop14h 59m
American Airlines
Thu 4/94:25 pm
HEL
-
STL
1 stop15h 23m
American Airlines
Deal found 1/28$534
This United Airlines deal was found by Cheapflights users on 1/28. 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 4/26:05 pm
STL
-
HEL
2 stops16h 50m
United Airlines
Thu 4/96:35 am
HEL
-
STL
2 stops24h 21m
United Airlines
Deal found 1/28$550
This American Airlines deal was found by Cheapflights users on 1/28. 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.
Fri 11/69:38 am
STL
-
HEL
1 stop17h 07m
American Airlines
Sat 11/2112:30 pm
HEL
-
STL
1 stop15h 00m
American Airlines
Deal found 1/28$607
This American Airlines deal was found by Cheapflights users on 1/28. 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 2/195:12 am
STL
-
HEL
1 stop21h 33m
American Airlines
Mon 2/2312:45 pm
HEL
-
STL
1 stop19h 11m
American Airlines
Deal found 1/28$689

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 29, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$484
(Finnair)

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 ($59 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 29, 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 4/1

6:00 am-2:15 pm

1 stop24h 15m

Helsinki-Vantaa

Wed 4/8

4:25 pm-8:23 am

1 stop23h 58m

$484

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Wed 4/1

9:37 am-2:15 pm

1 stop20h 38m

Helsinki-Vantaa

Wed 4/8

4:25 pm-10:14 pm

1 stop13h 49m

$484

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Wed 4/1

8:54 am-6:55 pm

2 stops26h 01m

Helsinki-Vantaa

Wed 4/8

1:55 pm-10:56 pm

2 stops17h 01m

$500

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Thu 4/2

9:35 am-10:45 am

1 stop17h 10m

Helsinki-Vantaa

Thu 4/9

12:35 pm-10:14 pm

2 stops17h 39m

$579

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Thu 2/19

1:34 pm-1:55 pm

2 stops16h 21m

Helsinki-Vantaa

Mon 2/23

12:45 pm-11:48 pm

2 stops19h 03m

$699

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Fri 3/13

1:34 pm-1:55 pm

2 stops17h 21m

Helsinki-Vantaa

Mon 3/16

12:30 pm-10:58 pm

1 stop17h 28m

$773

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Wed 4/1

9:10 am-1:05 pm

3 stops19h 55m

Helsinki-Vantaa

Wed 4/8

6:35 am-3:24 pm

2 stops16h 49m

$886

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Tue 6/30

9:35 pm-11:00 pm

1 stop17h 25m

Helsinki-Vantaa

Tue 7/14

4:00 pm-7:19 pm

2 stops35h 19m

$897

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Wed 7/1

7:50 pm-9:00 pm

2 stops17h 10m

Helsinki-Vantaa

Wed 7/15

7:20 am-7:30 pm

2 stops20h 10m

$921

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/28

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 29, 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
11,205 reviews

Boarding

7.5

Food

6.4

Overall

7.2

Crew

8.0

Entertainment

6.9

Comfort

7.2

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
11,205 reviews
American Airlines
7.2
Good
11,205 reviews

Boarding

7.5

Food

6.4

Overall

7.2

Crew

8.0

Entertainment

6.9

Comfort

7.2

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 and United Airlines fly from St. Louis to Finland in about 20h 38m. The time it takes to get you to your destination can typically vary by up to 5h 23m. 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 29, 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$484Average$668FlexibilityNo cancel feeOn-time71%

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