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$593+ Cheap flights from St. Louis (STL) to Finland

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/3. Fares are subject to change and may not be available on all flights or dates of travel.
STL — HEL
Apr 5 — Apr 121
Sat 4/5
Sat 4/12
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 March 31, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$834
(Finnair)

One-way from

$593
(Air France)

Popular in

June

Cheapest in

November

Average price

$576
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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One-way flight from Lambert-St Louis to Finland
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Highest demand for flights based on searches. 30% potential increase in price ($443 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($52 potential savings vs. average RT price).
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Average for round-trip flights in March 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 March 31, 2025.

This Finnair deal was found by Cheapflights users on 3/31. 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.
Thu 4/176:00 pmSTL - HEL
1 stop12h 15mMultiple Airlines
Fri 5/24:25 pmHEL - STL
1 stop15h 08mMultiple Airlines
Deal found 3/31$834
This American Airlines deal was found by Cheapflights users on 3/31. 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 4/177:04 amSTL - HEL
1 stop19h 41mAmerican Airlines
Fri 5/212:35 pmHEL - STL
2 stops17h 37mAmerican Airlines
Deal found 3/31$856
This Expedia deal was found by Cheapflights users on 3/30. 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.
Fri 4/1111:21 amSTL - HEL
2 stops16h 59mBritish Airways
Thu 4/174:25 pmHEL - STL
1 stop15h 08mBritish Airways
Deal found 3/30$857
This Delta deal was found by Cheapflights users on 3/31. 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.
Thu 4/1710:42 amSTL - HEL
2 stops21h 58mDelta
Fri 5/27:00 amHEL - STL
2 stops15h 32mDelta
Deal found 3/31$884
This oojo deal was found by Cheapflights users on 3/30. 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 11/43:15 pmSTL - HEL
2 stops36h 15mTurkish Airlines
Sat 11/812:25 pmHEL - STL
2 stops34h 56mTurkish Airlines
Deal found 3/30$980
This United Airlines deal was found by Cheapflights users on 3/30. 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.
Sat 7/195:30 pmSTL - HEL
2 stops34h 25mUnited Airlines
Sun 7/2712:40 pmHEL - STL
2 stops55h 47mUnited Airlines
Deal found 3/30$1,082
This Gurufare deal was found by Cheapflights users on 3/30. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/113:30 pmSTL - HEL
1 stop13h 20mLufthansa
Sat 7/196:10 amHEL - STL
2 stops17h 37mLufthansa
Deal found 3/30$1,360
This StudentUniverse deal was found by Cheapflights users on 3/30. 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 StudentUniverse is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/1111:21 amSTL - HEL
1 stop15h 24mFinnair
Sat 7/1912:35 pmHEL - STL
1 stop13h 58mFinnair
Deal found 3/30$1,504
This Air Canada deal was found by Cheapflights users on 3/31. 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.
Thu 4/1710:40 amSTL - HEL
3 stops18h 10mAir Canada
Fri 5/26:10 amHEL - STL
2 stops21h 48mAir Canada
Deal found 3/31$1,548
This Scandinavian Airlines deal was found by Cheapflights users on 3/30. 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.
Fri 4/1110:42 amSTL - HEL
2 stops25h 33mScandinavian Airlines
Thu 4/177:15 amHEL - STL
3 stops24h 21mScandinavian Airlines
Deal found 3/30$1,623

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 March 31, 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

Thu 4/17

6:00 pm-2:15 pm

1 stop12h 15m

Helsinki-Vantaa

Fri 5/2

4:25 pm-11:33 pm

1 stop15h 08m

$834

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Thu 4/17

10:17 am-2:15 pm

1 stop19h 58m

Helsinki-Vantaa

Fri 5/2

12:35 pm-10:12 pm

2 stops17h 37m

$856

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Fri 4/11

11:21 am-12:20 pm

2 stops16h 59m

Helsinki-Vantaa

Thu 4/17

4:25 pm-11:33 pm

1 stop15h 08m

$857

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Thu 4/17

10:42 am-4:40 pm

2 stops21h 58m

Helsinki-Vantaa

Fri 5/2

7:00 am-2:32 pm

2 stops15h 32m

$884

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Sat 7/19

5:30 pm-11:55 am

2 stops34h 25m

Helsinki-Vantaa

Sun 7/27

12:40 pm-12:27 pm

2 stops55h 47m

$1,082

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Fri 4/11

3:40 pm-11:40 am

2 stops36h 00m

Helsinki-Vantaa

Sat 7/19

12:35 pm-10:45 pm

2 stops42h 10m

$1,298

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Fri 4/11

3:30 pm-12:50 pm

1 stop13h 20m

Helsinki-Vantaa

Sat 7/19

6:10 am-3:47 pm

2 stops17h 37m

$1,360

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Fri 4/11

11:21 am-10:45 am

1 stop15h 24m

Helsinki-Vantaa

Sat 7/19

12:35 pm-6:33 pm

1 stop13h 58m

$1,504

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Thu 4/17

10:40 am-12:50 pm

3 stops18h 10m

Helsinki-Vantaa

Fri 5/2

6:10 am-7:58 pm

2 stops21h 48m

$1,548

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Fri 4/11

10:42 am-8:15 pm

2 stops25h 33m

Helsinki-Vantaa

Thu 4/17

7:15 am-11:36 pm

3 stops24h 21m

$1,623

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/30

Showing 1-10 of 12 results
1
2

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 $1,136). 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 March 31, 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 March 31, 2025.
Delta
8.0
Very good
7,899 reviews

Boarding

8.2

Entertainment

7.9

Comfort

8.0

Crew

8.5

Food

7.3

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
7,899 reviews
Delta
8.0
Very good
7,899 reviews

Boarding

8.2

Entertainment

7.9

Comfort

8.0

Crew

8.5

Food

7.3

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
1,267 reviews
Delta
8.0
Very good
7,899 reviews

Boarding

8.2

Entertainment

7.9

Comfort

8.0

Crew

8.5

Food

7.3

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.
Air France
7.4
Good
1,425 reviews
Delta
8.0
Very good
7,899 reviews

Boarding

8.2

Entertainment

7.9

Comfort

8.0

Crew

8.5

Food

7.3

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
8,614 reviews
Delta
8.0
Very good
7,899 reviews

Boarding

8.2

Entertainment

7.9

Comfort

8.0

Crew

8.5

Food

7.3

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
3,748 reviews
Delta
8.0
Very good
7,899 reviews

Boarding

8.2

Entertainment

7.9

Comfort

8.0

Crew

8.5

Food

7.3

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 $1,136). 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

Browse thousands of different options on Cheapflights for your next trip

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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 March 31, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$479Average$1,035FlexibilityNo cancel feeOn-time71%
British AirwaysCheapest$500Average$1,473FlexibilityNo cancel feeOn-time70%
LufthansaCheapest$533Average$803FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$576Average$701FlexibilityNo cancel feeOn-time69%
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