HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Finland

$419+ 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 10/13. Fares are subject to change and may not be available on all flights or dates of travel.
STL — HEL
Jul 6 — Jul 131
Sun 7/6
Sun 7/13
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from St. Louis to Finland with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 July 1, 2025.

Round-trip from

$482
(Finnair)

One-way from

$419
(American Airlines)

Popular in

May

Cheapest in

November

Average price

$1,004
From Lambert-St Louis to Finland
Search Deals
One-way flight from Lambert-St Louis to Finland
Search Deals
Highest demand for flights based on searches. 14% potential increase in price ($156 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($38 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2025
Search Deals

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 July 1, 2025.

This Finnair deal was found by Cheapflights users on 6/30. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/225:20 amSTL - HEL
1 stop21h 25mMultiple Airlines
Wed 10/2912:30 pmHEL - STL
1 stop15h 23mMultiple Airlines
Deal found 6/30$482
This American Airlines deal was found by Cheapflights users on 6/30. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/221:30 pmSTL - HEL
2 stops16h 30mAmerican Airlines
Wed 10/2912:30 pmHEL - STL
2 stops18h 24mAmerican Airlines
Deal found 6/30$486
This United Airlines deal was found by Cheapflights users on 7/1. 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 8/1210:15 amSTL - HEL
2 stops24h 40mUnited Airlines
Fri 8/226:10 amHEL - STL
2 stops44h 48mUnited Airlines
Deal found 7/1$604
This SmartFares deal was found by Cheapflights users on 7/1. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/261:26 pmSTL - HEL
2 stops37h 09mScandinavian Airlines
Wed 10/16:35 amHEL - STL
2 stops23h 25mScandinavian Airlines
Deal found 7/1$619
This Gurufare deal was found by Cheapflights users on 7/1. 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.
Tue 8/125:31 pmSTL - HEL
2 stops22h 19mLufthansa
Fri 8/226:10 amHEL - STL
1 stop15h 20mLufthansa
Deal found 7/1$800
This Delta deal was found by Cheapflights users on 7/1. 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 7/295:23 pmSTL - HEL
2 stops16h 17mDelta
Tue 8/57:00 amHEL - STL
2 stops21h 36mDelta
Deal found 7/1$1,052
This Booking.com deal was found by Cheapflights users on 7/1. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/298:01 pmSTL - HEL
2 stops16h 59mBritish Airways
Tue 8/512:35 pmHEL - STL
1 stop14h 56mBritish Airways
Deal found 7/1$1,111
This Mytrip deal was found by Cheapflights users on 7/1. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/291:30 pmSTL - HEL
3 stops19h 20mAir Canada
Tue 8/56:10 amHEL - STL
3 stops21h 50mAir Canada
Deal found 7/1$1,850
This Finnair deal was found by Cheapflights users on 7/1. 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.
Tue 7/224:52 pmSTL - HEL
2 stops18h 03mFinnair
Tue 8/57:35 amHEL - STL
2 stops24h 16mFinnair
Deal found 7/1$2,055

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 July 1, 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

Wed 10/22

5:20 am-10:45 am

1 stop21h 25m

Helsinki-Vantaa

Wed 10/29

12:30 pm-8:53 pm

1 stop15h 23m

$482

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Wed 10/22

1:30 pm-2:00 pm

2 stops16h 30m

Helsinki-Vantaa

Wed 10/29

12:30 pm-11:54 pm

2 stops18h 24m

$486

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Tue 8/12

10:15 am-6:55 pm

2 stops24h 40m

Helsinki-Vantaa

Fri 8/22

6:10 am-6:58 pm

2 stops44h 48m

$604

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Fri 9/26

1:26 pm-10:35 am

2 stops37h 09m

Helsinki-Vantaa

Wed 10/1

6:35 am-10:00 pm

2 stops23h 25m

$619

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Tue 8/12

5:31 pm-11:50 pm

2 stops22h 19m

Helsinki-Vantaa

Fri 8/22

6:10 am-1:30 pm

1 stop15h 20m

$800

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Tue 7/29

5:23 pm-5:40 pm

2 stops16h 17m

Helsinki-Vantaa

Tue 8/5

7:00 am-8:36 pm

2 stops21h 36m

$1,052

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Tue 7/29

8:01 pm-9:00 pm

2 stops16h 59m

Helsinki-Vantaa

Tue 8/5

12:35 pm-7:31 pm

1 stop14h 56m

$1,111

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Tue 7/29

1:30 pm-4:50 pm

3 stops19h 20m

Helsinki-Vantaa

Tue 8/5

6:10 am-8:00 pm

3 stops21h 50m

$1,850

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Tue 7/22

4:52 pm-6:55 pm

2 stops18h 03m

Helsinki-Vantaa

Tue 8/5

7:35 am-11:51 pm

2 stops24h 16m

$2,055

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Mon 10/13

8:49 am-10:45 am

1 stop17h 56m

$419

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/30

Showing 1-10 of 13 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 $1,084). 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 July 1, 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.

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 July 1, 2025.
Peruse reviews from past customers who have flown with Delta, Finnair, and United 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.
Delta
8.0
Very good
7,973 reviews

Overall

8.0

Entertainment

7.9

Food

7.3

Crew

8.5

Boarding

8.2

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,973 reviews
Delta
8.0
Very good
7,973 reviews

Overall

8.0

Entertainment

7.9

Food

7.3

Crew

8.5

Boarding

8.2

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Finnair
7.6
Good
1,301 reviews
Delta
8.0
Very good
7,973 reviews

Overall

8.0

Entertainment

7.9

Food

7.3

Crew

8.5

Boarding

8.2

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
United Airlines
7.4
Good
8,858 reviews
Delta
8.0
Very good
7,973 reviews

Overall

8.0

Entertainment

7.9

Food

7.3

Crew

8.5

Boarding

8.2

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Scandinavian Airlines
7.3
Good
1,414 reviews
Delta
8.0
Very good
7,973 reviews

Overall

8.0

Entertainment

7.9

Food

7.3

Crew

8.5

Boarding

8.2

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,973 reviews

Overall

8.0

Entertainment

7.9

Food

7.3

Crew

8.5

Boarding

8.2

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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.

  • What are the cheapest airlines to fly from St. Louis to Finland one-way?

    $419 is the cheapest one-way deal found within the past few days, from American Airlines. You may also be able to find cheap deals on United Airlines and British Airways, with prices starting from $421 and $433, respectively.

  • 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 $1,084). 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

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for St. Louis to Finland

See prices for flight routes from nearby airports that may be better suited for you.
St. Louis to Heathrow flights
Kansas City to Dublin flights
St. Louis to Frankfurt flights
St. Louis to Dublin flights
Kansas City to Heathrow flights
Kansas City to Charles de Gaulle flights
St. Louis to Gatwick flights
Kansas City to Frankfurt flights
St. Louis to Leonardo da Vinci/Fiumicino flights
Kansas City to Leonardo da Vinci/Fiumicino flights
St. Louis to Charles de Gaulle flights
Kansas City to Gatwick flights
St. Louis to Athens flights
Kansas City to Athens flights
St. Louis to Munich flights
St. Louis to London City flights
Kansas City to Amsterdam flights
St. Louis to Lisbon flights
St. Louis to Keflavik Intl flights
St. Louis to Sarajevo flights
Kansas City to Istanbul flights
Kansas City to Lisbon flights
Kansas City to Malpensa flights
Kansas City to Barcelona-El Prat flights
Kansas City to Keflavik Intl flights
Kansas City to Madrid flights
Kansas City to Orly flights
St. Louis to Barcelona-El Prat flights
St. Louis to Vicenza flights
St. Louis to Edinburgh flights
St. Louis to Zurich flights
St. Louis to Orly flights
Kansas City to Linate flights
Kansas City to London City flights
Kansas City to Sabiha Gokcen flights
St. Louis to Madrid flights
Kansas City to Vicenza flights
Kansas City to Munich flights
St. Louis to Istanbul flights
St. Louis to Malpensa flights
Springfield to Heathrow flights
St. Louis to Stansted flights
Kansas City to Oslo Gardermoen flights
St. Louis to Oslo Gardermoen flights
Kansas City to Naples flights
St. Louis to Florence flights
St. Louis to Amsterdam flights
St. Louis to Berlin flights
Kansas City to Edinburgh flights
Kansas City to Florence flights

Top 5 airlines flying from St. Louis to Finland

Discover the top 5 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 July 1, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$479Average$588FlexibilityNo cancel feeOn-time71%
British AirwaysCheapest$495Average$528FlexibilityNo cancel feeOn-time70%
FinnairCheapest$506Average$800FlexibilityNo cancel feeOn-time76%
LufthansaCheapest$533Average$803FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$576Average$715FlexibilityNo cancel feeOn-time69%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.