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$702+ 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 11/9. Fares are subject to change and may not be available on all flights or dates of travel.
STL — HEL
May 4 — May 111
Sun 5/4
Sun 5/11
1 adult, Economy
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Cheap 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 April 29, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$720
(American Airlines)

Popular in

June

Cheapest in

November

Average price

$668
Provider with most accurate pricing for Lambert-St Louis-Helsinki-Vantaa flight deals.
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Provider most trusted by Cheapflights users for Lambert-St Louis-Helsinki-Vantaa flights.
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From Lambert-St Louis to Finland
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Highest demand for flights based on searches. 31% potential increase in price ($464 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($50 potential savings vs. average RT price).
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Average for round-trip flights in April 2025
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Find 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 April 29, 2025.

This Expedia deal was found by Cheapflights users on 4/28. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/911:20 amSTL - HEL
2 stops19h 55mBritish Airways
Sat 11/152:00 pmHEL - STL
2 stops38h 16mBritish Airways
Deal found 4/28$702
This United Airlines deal was found by Cheapflights users on 4/29. 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.
Sun 11/93:45 pmSTL - HEL
1 stop13h 55mUnited Airlines
Sat 11/152:25 pmHEL - STL
2 stops33h 01mUnited Airlines
Deal found 4/29$718
This American Airlines deal was found by Cheapflights users on 4/28. 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 10/2412:03 pmSTL - HEL
1 stop14h 42mAmerican Airlines
Sat 11/112:30 pmHEL - STL
1 stop17h 04mAmerican Airlines
Deal found 4/28$720
This FlightHub deal was found by Cheapflights users on 4/29. 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.
Sun 11/93:45 pmSTL - HEL
1 stop17h 05mLufthansa
Sat 11/155:50 pmHEL - STL
1 stop28h 05mLufthansa
Deal found 4/29$724
This Air Canada deal was found by Cheapflights users on 4/28. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/244:05 pmSTL - HEL
2 stops18h 50mMultiple Airlines
Sat 11/17:00 amHEL - STL
3 stops35h 27mMultiple Airlines
Deal found 4/28$762
This Air Canada deal was found by Cheapflights users on 4/28. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/241:30 pmSTL - HEL
2 stops21h 25mAir Canada
Sun 9/146:10 amHEL - STL
2 stops21h 47mAir Canada
Deal found 4/28$784
This Delta deal was found by Cheapflights users on 4/28. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/1111:48 amSTL - HEL
2 stops20h 52mDelta
Wed 6/187:00 amHEL - STL
2 stops21h 40mDelta
Deal found 4/28$1,093
This Scandinavian Airlines deal was found by Cheapflights users on 4/28. 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 Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/113:30 pmSTL - HEL
2 stops24h 25mScandinavian Airlines
Sat 10/187:20 amHEL - STL
3 stops24h 19mScandinavian Airlines
Deal found 4/28$1,181
This AranGrant deal was found by Cheapflights users on 4/28. 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 AranGrant is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/241:54 pmSTL - HEL
1 stop12h 51mFinnair
Sat 11/112:30 pmHEL - STL
1 stop17h 04mFinnair
Deal found 4/28$1,704
This oojo deal was found by Cheapflights users on 4/28. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/246:35 amSTL - HEL
2 stops21h 05mTurkish Airlines
Sat 11/112:25 pmHEL - STL
2 stops33h 53mTurkish Airlines
Deal found 4/28$3,830

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 April 29, 2025.
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

Fri 10/24

12:03 pm-10:45 am

1 stop14h 42m

Helsinki-Vantaa

Sat 11/1

12:30 pm-10:34 pm

1 stop17h 04m

$720

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Sat 10/11

8:01 pm-2:20 pm

2 stops34h 19m

Helsinki-Vantaa

Sat 10/18

9:05 pm-11:49 pm

2 stops34h 44m

$745

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Fri 10/24

4:05 pm-6:55 pm

2 stops18h 50m

Helsinki-Vantaa

Sat 11/1

7:00 am-11:27 am

3 stops35h 27m

$762

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Sun 8/24

1:30 pm-6:55 pm

2 stops21h 25m

Helsinki-Vantaa

Sun 9/14

6:10 am-7:57 pm

2 stops21h 47m

$784

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Tue 8/26

5:30 pm-6:55 pm

2 stops17h 25m

Helsinki-Vantaa

Sun 8/31

6:10 am-1:30 pm

1 stop15h 20m

$800

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Wed 6/11

11:48 am-4:40 pm

2 stops20h 52m

Helsinki-Vantaa

Wed 6/18

7:00 am-8:40 pm

2 stops21h 40m

$1,093

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Sat 10/11

3:30 pm-11:55 pm

2 stops24h 25m

Helsinki-Vantaa

Sat 10/18

7:20 am-11:39 pm

3 stops24h 19m

$1,181

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Wed 6/11

8:10 am-4:40 pm

2 stops24h 30m

Helsinki-Vantaa

Wed 6/18

6:10 am-10:15 pm

3 stops24h 05m

$1,361

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Fri 10/24

1:54 pm-10:45 am

1 stop12h 51m

Helsinki-Vantaa

Sat 11/1

12:30 pm-10:34 pm

1 stop17h 04m

$1,704

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Fri 10/24

6:35 am-11:40 am

2 stops21h 05m

Helsinki-Vantaa

Sat 11/1

12:25 pm-3:18 pm

2 stops33h 53m

$3,830

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/28

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

What is the cheapest month to book a flight from St. Louis to Finland?

Currently, November is the cheapest month in which you can book a flight from St. Louis to Finland (average of $444). Flying from St. Louis to Finland in June is currently the most expensive (average of $1,085). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from STL to FI?

Find hourly flight availability from St. Louis to Finland. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated April 29, 2025.

When flying from St. Louis to Finland, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Rainfall in Finland by month

Plan your trip to Finland by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Finland ranges from 1.2 - 2.8 inches per month. August is typically the wettest month, when rainfall can reach 2.8 in. February is typically the driest time to visit Finland when rainfall is around 1.2 in.

Temperature in Finland by month

Plan your trip to Finland by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Finland, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 60.8 F. Travelers looking to avoid the cold should look outside of February, when temperatures are typically at their lowest (around 21.2 F).

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 April 29, 2025.
Delta
8.0
Very good
7,936 reviews

Comfort

7.9

Food

7.3

Entertainment

7.9

Crew

8.5

Boarding

8.2

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Delta
8.0
Very good
7,936 reviews
Delta
8.0
Very good
7,936 reviews

Comfort

7.9

Food

7.3

Entertainment

7.9

Crew

8.5

Boarding

8.2

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Finnair
7.6
Good
1,275 reviews
Delta
8.0
Very good
7,936 reviews

Comfort

7.9

Food

7.3

Entertainment

7.9

Crew

8.5

Boarding

8.2

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
United Airlines
7.4
Good
8,696 reviews
Delta
8.0
Very good
7,936 reviews

Comfort

7.9

Food

7.3

Entertainment

7.9

Crew

8.5

Boarding

8.2

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Turkish Airlines
7.3
Good
3,788 reviews
Delta
8.0
Very good
7,936 reviews

Comfort

7.9

Food

7.3

Entertainment

7.9

Crew

8.5

Boarding

8.2

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Scandinavian Airlines
7.3
Good
1,349 reviews
Delta
8.0
Very good
7,936 reviews

Comfort

7.9

Food

7.3

Entertainment

7.9

Crew

8.5

Boarding

8.2

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

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.

  • 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.

  • What is the cheapest month to book a flight from St. Louis to Finland?

    Currently, November is the cheapest month in which you can book a flight from St. Louis to Finland (average of $444). Flying from St. Louis to Finland in June is currently the most expensive (average of $1,085). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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 4 airlines flying from St. Louis to Finland

Discover the top 4 airlines 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 April 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$479Average$668FlexibilityNo cancel feeOn-time71%
British AirwaysCheapest$495Average$528FlexibilityNo cancel feeOn-time70%
FinnairCheapest$506Average$1,016FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$576Average$701FlexibilityNo cancel feeOn-time69%

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