HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Finland

$495+ 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 11/25. Fares are subject to change and may not be available on all flights or dates of travel.
STL — HEL
Nov 15 — Nov 221
Sat 11/15
Sat 11/22
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 October 16, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$503
(American Airlines)

Popular in

June

Cheapest in

November

Average price

$677
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 ($235 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($27 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 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 October 16, 2025.

This KLM deal was found by Cheapflights users on 10/16. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/2511:39 amSTL - HEL
2 stops17h 31mKLM
Tue 12/26:20 pmHEL - STL
2 stops30h 01mKLM
Deal found 10/16$495
This Expedia deal was found by Cheapflights users on 10/16. 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.
Tue 11/256:43 pmSTL - HEL
2 stops16h 07mLufthansa
Tue 12/25:45 pmHEL - STL
1 stop28h 10mLufthansa
Deal found 10/16$502
This United Airlines deal was found by Cheapflights users on 10/15. 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 11/298:00 amSTL - HEL
2 stops21h 05mUnited Airlines
Sat 12/66:55 amHEL - STL
2 stops20h 53mUnited Airlines
Deal found 10/15$630
This Air Canada deal was found by Cheapflights users on 10/16. 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.
Tue 11/2511:05 amSTL - HEL
3 stops18h 05mMultiple Airlines
Tue 12/27:05 amHEL - STL
2 stops40h 24mMultiple Airlines
Deal found 10/16$826
This American Airlines deal was found by Cheapflights users on 10/15. 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.
Sat 11/292:17 pmSTL - HEL
2 stops16h 58mAmerican Airlines
Sat 12/612:30 pmHEL - STL
1 stop15h 06mAmerican Airlines
Deal found 10/15$827
This United Airlines deal was found by Cheapflights users on 10/16. 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 10/193:30 pmSTL - HEL
1 stop25h 10mUnited Airlines
Tue 10/281:55 pmHEL - STL
2 stops27h 12mUnited Airlines
Deal found 10/16$864
This KAYAK deal was found by Cheapflights users on 10/15. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/1912:25 pmSTL - HEL
2 stops28h 15mLufthansa
Tue 10/2812:45 pmHEL - STL
2 stops35h 54mLufthansa
Deal found 10/15$886
This Delta deal was found by Cheapflights users on 10/16. 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.
Sun 10/196:52 pmSTL - HEL
2 stops14h 48mDelta
Tue 10/287:00 amHEL - STL
2 stops23h 06mDelta
Deal found 10/16$933
This Air Canada deal was found by Cheapflights users on 10/15. 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.
Sat 11/2911:05 amSTL - HEL
3 stops18h 00mMultiple Airlines
Sat 12/66:55 amHEL - STL
2 stops40h 34mMultiple Airlines
Deal found 10/15$971

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 October 16, 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

Tue 11/25

11:39 am-1:10 pm

2 stops17h 31m

Helsinki-Vantaa

Tue 12/2

6:20 pm-4:21 pm

2 stops30h 01m

$495

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Wed 3/4

11:30 am-11:10 am

1 stop15h 40m

Helsinki-Vantaa

Sun 3/15

12:30 pm-10:24 pm

1 stop16h 54m

$532

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Fri 3/27

4:50 pm-4:50 pm

1 stop17h 00m

Helsinki-Vantaa

Tue 3/31

1:30 pm-3:24 pm

2 stops33h 54m

$549

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Wed 3/4

4:05 pm-4:30 pm

2 stops16h 25m

Helsinki-Vantaa

Sun 3/15

6:50 am-3:29 pm

2 stops39h 39m

$557

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Fri 3/27

4:50 pm-1:05 pm

1 stop13h 15m

Helsinki-Vantaa

Tue 3/31

5:40 pm-1:30 pm

1 stop27h 50m

$564

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Sat 11/29

8:00 am-1:05 pm

2 stops21h 05m

Helsinki-Vantaa

Sat 12/6

6:55 am-7:48 pm

2 stops20h 53m

$630

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/16

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 $479). Flying from St. Louis to Finland in June is currently the most expensive (average of $1,072). 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 October 16, 2025.

It’s optimal to fly from St. Louis to Finland in the morning. By choosing this option you can save up to 40% on the cost of your flight, compared to a flight in the afternoon.

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 October 16, 2025.
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
11,043 reviews

Comfort

7.2

Entertainment

6.9

Overall

7.2

Boarding

7.5

Food

6.4

Crew

8.0

Reviews

1 / 20
2.0
Mediocre

Jeremy,Sep 2025

SAN - PHL

Terrible. Bad customer service and unacceptable delay on the tarmac
American Airlines
7.2
Good
11,043 reviews
American Airlines
7.2
Good
11,043 reviews

Comfort

7.2

Entertainment

6.9

Overall

7.2

Boarding

7.5

Food

6.4

Crew

8.0

Reviews

1 / 20
2.0
Mediocre

Jeremy,Sep 2025

SAN - PHL

Terrible. Bad customer service and unacceptable delay on the tarmac

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 KLM, American Airlines, and United Airlines fly from St. Louis to Finland in about 15h 40m. The time it takes to get you to your destination can typically vary by up to 1h 51m. 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.

  • 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 $479). Flying from St. Louis to Finland in June is currently the most expensive (average of $1,072). 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 Frankfurt flights
St. Louis to Heathrow flights
Kansas City to Heathrow flights
Kansas City to Dublin flights
St. Louis to Gatwick flights
Kansas City to Gatwick flights
Kansas City to Frankfurt flights
St. Louis to London City flights
Kansas City to Charles de Gaulle flights
Kansas City to Madrid flights
Kansas City to Barcelona-El Prat flights
Kansas City to Leonardo da Vinci/Fiumicino flights
St. Louis to Madrid flights
St. Louis to Charles de Gaulle flights
St. Louis to Istanbul flights
Kansas City to Lisbon flights
St. Louis to Dublin flights
Kansas City to London City flights
St. Louis to Leonardo da Vinci/Fiumicino flights
Kansas City to Vicenza flights
St. Louis to Munich flights
Kansas City to Orly flights
Springfield to Madrid flights
Springfield to Heathrow flights
Kansas City to Athens flights
St. Louis to Lisbon flights
St. Louis to Amsterdam flights
St. Louis to Barcelona-El Prat flights
St. Louis to Edinburgh flights
Springfield to Barcelona-El Prat flights
St. Louis to Stansted flights
Kansas City to Istanbul flights
St. Louis to Sabiha Gokcen flights
St. Louis to Athens flights
St. Louis to Zurich flights
Springfield to Frankfurt flights
St. Louis to Sarajevo flights
St. Louis to Orly flights
Kansas City to Amsterdam flights
Kansas City to Munich flights
Kansas City to Edinburgh flights
St. Louis to Vicenza flights
St. Louis to Bruxelles-National flights
Kansas City to Prague flights
Kansas City to Zurich flights
Kansas City to Berlin flights
Kansas City to Vienna flights
St. Louis to Keflavik Intl flights
Kansas City to Duesseldorf Intl flights
Kansas City to Sabiha Gokcen flights

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 October 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$490Average$776FlexibilityNo cancel feeOn-time71%

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.