HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Finland

$497+ 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 1/28. Fares are subject to change and may not be available on all flights or dates of travel.
STL — HEL
Jan 11 — Jan 181
Sun 1/11
Sun 1/18
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

Best flights from St. Louis to Finland
Discover carefully curated flight deals from St. Louis to Finland that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated December 12, 2025.

This United Airlines deal was found by Cheapflights users on 12/9. 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.
Wed 1/289:57 amSTL - HEL
2 stops24h 53mUnited Airlines
Sun 2/16:55 amHEL - STL
2 stops22h 18mUnited Airlines
Deal found 12/9$497
This Finnair deal was found by Cheapflights users on 12/10. 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 3/55:14 amSTL - HEL
1 stop21h 31mMultiple Airlines
Sun 3/158:30 pmHEL - STL
2 stops32h 21mMultiple Airlines
Deal found 12/10$513
This FlightHub deal was found by Cheapflights users on 12/10. 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.
Thu 3/51:14 pmSTL - HEL
2 stops28h 06mLufthansa
Sun 3/155:45 pmHEL - STL
2 stops37h 06mLufthansa
Deal found 12/10$695
This Trip.com deal was found by Cheapflights users on 12/10. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/511:46 amSTL - HEL
1 stop14h 59mFinnair
Sun 3/1512:30 pmHEL - STL
1 stop13h 59mFinnair
Deal found 12/10$716
This British Airways deal was found by Cheapflights users on 12/9. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 1/283:20 pmSTL - HEL
2 stops15h 55mBritish Airways
Sun 2/112:30 pmHEL - STL
1 stop14h 59mBritish Airways
Deal found 12/9$903
This Delta deal was found by Cheapflights users on 12/10. 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 5/172:18 pmSTL - HEL
2 stops18h 22mDelta
Sun 5/247:00 amHEL - STL
2 stops17h 45mDelta
Deal found 12/10$1,155
This Finnair deal was found by Cheapflights users on 12/9. 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 1/2810:00 amSTL - HEL
1 stop17h 10mFinnair
Sun 2/112:30 pmHEL - STL
1 stop14h 59mFinnair
Deal found 12/9$1,009

Find 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 December 12, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$497
(United Airlines)

Popular in

May

Cheapest in

December

Average price

$636
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. 17% potential increase in price ($196 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease ($56 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

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 December 12, 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 1/28

9:57 am-6:50 pm

2 stops24h 53m

Helsinki-Vantaa

Sun 2/1

6:55 am-9:13 pm

2 stops22h 18m

$497

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Thu 3/5

5:14 am-10:45 am

1 stop21h 31m

Helsinki-Vantaa

Sun 3/15

8:30 pm-9:51 pm

2 stops32h 21m

$513

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Thu 3/5

1:14 pm-1:20 am

2 stops28h 06m

Helsinki-Vantaa

Sun 3/15

5:45 pm-11:51 pm

2 stops37h 06m

$695

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Thu 3/5

11:46 am-10:45 am

1 stop14h 59m

Helsinki-Vantaa

Sun 3/15

12:30 pm-7:29 pm

1 stop13h 59m

$716

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Wed 1/28

3:20 pm-3:15 pm

2 stops15h 55m

Helsinki-Vantaa

Sun 2/1

12:30 pm-7:29 pm

1 stop14h 59m

$903

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Wed 1/28

10:00 am-11:10 am

1 stop17h 10m

Helsinki-Vantaa

Sun 2/1

12:30 pm-7:29 pm

1 stop14h 59m

$1,009

St. LouisHelsinki

STL - HEL

STLHEL

Lambert-St Louis

Sun 5/17

2:18 pm-4:40 pm

2 stops18h 22m

Helsinki-Vantaa

Sun 5/24

7:00 am-4:45 pm

2 stops17h 45m

$1,155

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/9

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 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 December 12, 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 December 12, 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
11,050 reviews

Food

6.5

Comfort

7.2

Crew

8.0

Entertainment

6.9

Overall

7.2

Boarding

7.5

Reviews

1 / 20
10.0
Excellent

Jeremy,Dec 2025

OKC - CLT

Was an okay flight. Had extra seat empty beside me so was able to stretch a bit
American Airlines
7.2
Good
11,050 reviews
American Airlines
7.2
Good
11,050 reviews

Food

6.5

Comfort

7.2

Crew

8.0

Entertainment

6.9

Overall

7.2

Boarding

7.5

Reviews

1 / 20
10.0
Excellent

Jeremy,Dec 2025

OKC - CLT

Was an okay flight. Had extra seat empty beside me so was able to stretch a bit

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 United Airlines, Lufthansa, and Finnair fly from St. Louis to Finland in about 14h 59m. The time it takes to get you to your destination can typically vary by up to 13h 07m. 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.

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 Heathrow flights
Kansas City to Dublin flights
Kansas City to Leonardo da Vinci/Fiumicino flights
Kansas City to Charles de Gaulle flights
St. Louis to Dublin flights
St. Louis to Charles de Gaulle flights
St. Louis to Leonardo da Vinci/Fiumicino flights
St. Louis to Frankfurt flights
St. Louis to Orly flights
Kansas City to Gatwick flights
St. Louis to Gatwick flights
Kansas City to Frankfurt flights
Kansas City to Barcelona-El Prat flights
St. Louis to Athens flights
St. Louis to London City flights
St. Louis to Lisbon flights
Kansas City to Orly flights
Kansas City to Madrid flights
Kansas City to Athens flights
Kansas City to Vicenza flights
St. Louis to Amsterdam flights
St. Louis to Malpensa flights
Kansas City to London City flights
St. Louis to Istanbul flights
Springfield to Heathrow flights
St. Louis to Barcelona-El Prat flights
St. Louis to Zurich flights
Kansas City to Copenhagen flights
Kansas City to Amsterdam flights
Kansas City to Istanbul flights
Kansas City to Edinburgh flights
Kansas City to Lisbon flights
St. Louis to Madrid flights
St. Louis to Oslo Gardermoen flights
St. Louis to Bruxelles-National flights
Kansas City to Berlin flights
Kansas City to Stansted flights
St. Louis to Linate flights
St. Louis to Edinburgh flights
St. Louis to Zagreb flights
Kansas City to Malpensa flights
Kansas City to Prague flights
Kansas City to Zurich flights
St. Louis to Naples flights
Kansas City to Sabiha Gokcen flights
Springfield to London City flights
Kansas City to Keflavik Intl flights
Kansas City to Munich flights
St. Louis 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 December 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$490Average$764FlexibilityNo 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.