What are the cheapest airlines flying from St. Louis to Helsinki round-trip?

American Airlines, at $720, was found to be the cheapest airline from St. Louis to Helsinki.Alternate airlines to your destination round-trip include British Airways and Air Canada. These flights start at 27% lower than the current average price 3 months from now.

What is the cheapest day to fly from St. Louis to Helsinki?

Travelers seeking maximum savings on their St. Louis to Helsinki flight should consider departing on Tuesday mornings when fares are most often at their lowest. Wednesday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

What are the most popular airlines that fly from St. Louis to Helsinki?

When booking a flight from St. Louis to Helsinki, you may want to consider flying on American Airlines, Finnair or British Airways as they are the most popular for this route.

What is the cheapest day to fly round-trip from St. Louis to Helsinki?

Users have found that leaving on a Monday can be a cost-effective option. It’s possible to save up to 189% on your flight compared to booking on days when demand is much higher.

What is the cheapest month to fly from St. Louis to Helsinki?

The best pricing can be found in the month of November. Prices to Helsinki from St. Louis average $998. You can even find prices in November for less than $998, as users have found deals to Helsinki from as low as $479. The month of June appears to be one of the more expensive times to travel to Helsinki from St. Louis. Flying in the targeted month can save you up to 54%.

Most accurate provider : When it comes to deals on St. Louis-Helsinki flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on St. Louis-Helsinki flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from St. Louis-Helsinki flight searches over the past month and is updated monthly.

Most trusted provider : When it comes to deals on St. Louis-Helsinki flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for St. Louis-Helsinki flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Can I find deals for flights from St. Louis to Helsinki that include hotel bookings?

Yes. In addition to deals on St. Louis to Helsinki flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from St. Louis to Helsinki?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to Helsinki.

Can I find deals for business class flights from St. Louis to Helsinki?

Yes. Cheapflights offers flight deals from St. Louis to Helsinki by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

$702+ Flights from St. Louis to Helsinki

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1. Tell us where you want to go

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Cheap flight deals from St. Louis to Helsinki

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.

Search Deals

Provider most trusted by Cheapflights users for Lambert-St Louis-Helsinki-Vantaa flights.

Search Deals

From Lambert-St Louis to Helsinki-Vantaa

Search Deals

Highest demand for flights based on searches. 31% potential increase in price ($464 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 5% potential price decrease ($50 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in April 2025

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Find flight deals from St. Louis to Helsinki

Cheapest flights from St. Louis to Helsinki
Explore the most affordable flight options available from St. Louis to Helsinki. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 29, 2025.

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

Sun 11/93:45 pmSTL - HEL

1 stop13h 55mUnited Airlines

Sat 11/152:25 pmHEL - STL

2 stops33h 01mUnited Airlines

Deal found 4/28

$718

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

Sun 11/93:45 pmSTL - HEL

1 stop17h 05mLufthansa

Sat 11/155:50 pmHEL - STL

1 stop28h 05mLufthansa

Deal found 4/28

$724

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

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

Wed 6/1111:48 amSTL - HEL

2 stops20h 52mDelta

Wed 6/187:00 amHEL - STL

2 stops21h 40mDelta

Deal found 4/28

$1,093

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

Fri 10/241:54 pmSTL - HEL

1 stop12h 51mFinnair

Sat 11/112:30 pmHEL - STL

1 stop17h 04mFinnair

Deal found 4/28

$1,704

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

Best flights from St. Louis to Helsinki
Discover carefully curated flight deals from St. Louis to Helsinki that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 29, 2025.

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

Sat 10/118:01 pmSTL - HEL

2 stops34h 19mBritish Airways

Sat 10/189:05 pmHEL - STL

2 stops34h 44mBritish Airways

Deal found 4/28

$745

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

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

Tue 8/265:30 pmSTL - HEL

2 stops17h 25mLufthansa

Sun 8/316:10 amHEL - STL

1 stop15h 20mLufthansa

Deal found 4/27

$800

Wed 6/1111:48 amSTL - HEL

2 stops20h 52mDelta

Wed 6/187:00 amHEL - STL

2 stops21h 40mDelta

Deal found 4/28

$1,093

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

Wed 6/118:10 amSTL - HEL

2 stops24h 30mUnited Airlines

Wed 6/186:10 amHEL - STL

3 stops24h 05mUnited Airlines

Deal found 4/28

$1,361

Fri 10/241:54 pmSTL - HEL

1 stop12h 51mFinnair

Sat 11/112:30 pmHEL - STL

1 stop17h 04mFinnair

Deal found 4/28

$1,704

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

Use the filters below to find and compare flights from St. Louis to Helsinki that are best for you.

Fly from

Fly to

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

Compare providers for flights from St. Louis to Helsinki

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from St. Louis to Helsinki in April.

Provider	Price Accuracy	Trust Score*
Expedia	Price Accuracy1 star	Trust Score*3 stars
eDreams	Price Accuracy3 stars	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust Score*2 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

Most accurate provider: When it comes to deals on St. Louis-Helsinki flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on St. Louis-Helsinki flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from St. Louis-Helsinki flight searches over the past month and is updated monthly.
Most trusted provider: When it comes to deals on St. Louis-Helsinki flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for St. Louis-Helsinki flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from St. Louis to Helsinki

Have a flexible travel schedule? Discover the best time to fly to Helsinki 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 Helsinki

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

Currently, November is the cheapest month in which you can book a flight from St. Louis to Helsinki (average of $444). Flying from St. Louis to Helsinki 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 HEL?

It’s typically best to fly out from St. Louis to Helsinki in the morning. Doing so could potentially save you 53% on the flight price compared to flying at noon, which is usually more expensive.

Rainfall in Helsinki by month

In terms of precipitation, rainfall in Helsinki 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 Helsinki when rainfall is around 1.2 in.

Temperature in Helsinki by month

If weather is an important factor for your trip to Helsinki, 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 Helsinki

Delta

8.0

Very good

7,929 reviews

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

7,929 reviews

Delta

8.0

Very good

7,929 reviews

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

1,273 reviews

Delta

8.0

Very good

7,929 reviews

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

7,929 reviews

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

3,785 reviews

Delta

8.0

Very good

7,929 reviews

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

1,345 reviews

Delta

8.0

Very good

7,929 reviews

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

What are the cheapest airlines flying from St. Louis to Helsinki round-trip?
American Airlines, at $720, was found to be the cheapest airline from St. Louis to Helsinki.Alternate airlines to your destination round-trip include British Airways and Air Canada. These flights start at 27% lower than the current average price 3 months from now.
Can I find deals for flights from St. Louis to Helsinki that include hotel bookings?
Yes. In addition to deals on St. Louis to Helsinki flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from St. Louis to Helsinki?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to Helsinki.
Can I find deals for business class flights from St. Louis to Helsinki?
Yes. Cheapflights offers flight deals from St. Louis to Helsinki 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 Helsinki?
Currently, November is the cheapest month in which you can book a flight from St. Louis to Helsinki (average of $444). Flying from St. Louis to Helsinki 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

Vantaa

Espoo

Lahti

Browse thousands of different options on Cheapflights for your next trip

Alternative routes for St. Louis to Helsinki

Kansas City to Helsinki flights

Other flights to Helsinki

Top 4 airlines flying from St. Louis to Helsinki

Airline	Cheapest	Average	Flexibility	On-time
American Airlines	Cheapest$479	Average$668	FlexibilityNo cancel fee	On-time71%
British Airways	Cheapest$495	Average$528	FlexibilityNo cancel fee	On-time70%
Finnair	Cheapest$506	Average$1,016	FlexibilityNo cancel fee	On-time76%
United Airlines	Cheapest$576	Average$701	FlexibilityNo cancel fee	On-time69%

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$702+ Cheap flights from St. Louis (STL) to Helsinki (HEL)

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.

Find cheap flights from St. Louis to Helsinki with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from St. Louis to Helsinki

Most accurate provider

Most trusted provider

Round-trip from

Popular in

Cheapest in

Average price

Find flight deals from St. Louis to Helsinki

Cheapest flights from St. Louis to HelsinkiExplore the most affordable flight options available from St. Louis to Helsinki. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 29, 2025.

Explore the most affordable flight options available from St. Louis to Helsinki. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 29, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from St. Louis to Helsinki that are best for you.

Compare providers for flights from St. Louis to Helsinki

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from St. Louis to Helsinki in April.

Best time to book a flight from St. Louis to Helsinki

Have a flexible travel schedule? Discover the best time to fly to Helsinki from St. Louis with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from St. Louis to Helsinki

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

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

Find hourly flight availability from St. Louis to Helsinki. 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.

Rainfall in Helsinki by month

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

Temperature in Helsinki by month

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

Reviews of airlines servicing Helsinki

Related info for your journey

Find useful and relevant information for your journey from St. Louis to Helsinki. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

What are the cheapest airlines flying from St. Louis to Helsinki round-trip?

Can I find deals for flights from St. Louis to Helsinki that include hotel bookings?

How can I find direct flights from St. Louis to Helsinki?

Can I find deals for business class flights from St. Louis to Helsinki?

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

Traveling to a place near St. Louis?

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for St. Louis to Helsinki

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Top 4 airlines flying from St. Louis to Helsinki

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Cheapest flights from St. Louis to Helsinki
Explore the most affordable flight options available from St. Louis to Helsinki. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 29, 2025.