$555+ 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 12/28. Fares are subject to change and may not be available on all flights or dates of travel.
STL — HEL
Nov 25 — Dec 21
Round-trip
1 adult, Economy
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Find cheap flights from St. Louis to Helsinki 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 Helsinki
Cheapest
Best
Last-minute
One-way
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 October 26, 2026.
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 October 26, 2026.
This Cheapflightsfares deal was found by Cheapflights users on 10/25. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/302:31 pm -
2 stops16h 54m
Wed 12/96:15 am -
2 stops23h 23m
Deal found 10/25![Scandinavian Airlines logo]()
$711
This FlightHub deal was found by Cheapflights users on 10/21. 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.
Wed 12/22:33 pm -
2 stops35h 57m
Tue 12/89:00 pm -
2 stops32h 38m
Deal found 10/21![Scandinavian Airlines logo]()
$714
This Scandinavian Airlines deal was found by Cheapflights users on 10/21. 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.
Wed 12/212:36 pm -
2 stops37h 54m
Sun 12/64:05 pm -
2 stops40h 00m
Deal found 10/21![Scandinavian Airlines logo]()
$748
This Scandinavian Airlines deal was found by Cheapflights users on 10/23. 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 11/132:31 pm -
2 stops27h 04m
Sun 11/226:15 am -
2 stops25h 41m
Deal found 10/23![Scandinavian Airlines logo]()
$778
This Justfly.com deal was found by Cheapflights users on 10/25. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/306:50 pm -
2 stops15h 55m
Wed 12/97:05 am -
1 stop14h 40m
Deal found 10/25![Lufthansa logo]()
$780
This FlightHub deal was found by Cheapflights users on 10/21. 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.
Mon 11/306:50 pm -
2 stops15h 55m
Tue 12/87:05 am -
2 stops23h 10m
Deal found 10/21![Lufthansa logo]()
$783
This Finnair deal was found by Cheapflights users on 10/21. 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 11/185:00 am -
1 stop22h 40m
Wed 11/254:50 pm -
2 stops27h 41m
Deal found 10/21![Multiple Airlines logo]()
$791
This FlightHub deal was found by Cheapflights users on 10/21. 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.
Wed 11/183:40 pm -
1 stop13h 15m
Tue 11/247:05 am -
2 stops22h 35m
Deal found 10/21![Lufthansa logo]()
$796
This KAYAK deal was found by Cheapflights users on 10/21. 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.
Wed 11/183:40 pm -
1 stop13h 15m
Fri 11/277:05 am -
1 stop14h 40m
Deal found 10/21![Lufthansa logo]()
$798
This United Airlines deal was found by Cheapflights users on 10/21. 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 11/189:59 am -
2 stops17h 51m
Thu 11/2612:35 pm -
2 stops28h 18m
Deal found 10/21![United Airlines logo]()
$799
Best flights from St. Louis to HelsinkiDiscover 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 October 26, 2026.
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 October 26, 2026.
This Scandinavian Airlines deal was found by Cheapflights users on 10/25. 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.
Wed 12/212:36 pm -
2 stops37h 54m
Sun 12/64:05 pm -
2 stops40h 00m
Deal found 10/25![Scandinavian Airlines logo]()
$748
This United Airlines deal was found by Cheapflights users on 10/21. 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 11/297:30 am -
2 stops27h 15m
Thu 12/1012:35 pm -
2 stops18h 24m
Deal found 10/21![United Airlines logo]()
$804
This Delta deal was found by Cheapflights users on 10/21. 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 12/16:32 am -
2 stops26h 08m
Wed 12/92:05 pm -
2 stops38h 27m
Deal found 10/21![Delta logo]()
$805
This British Airways deal was found by Cheapflights users on 10/22. 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.
Sun 2/2812:59 pm -
2 stops39h 21m
Thu 3/412:30 pm -
1 stop15h 46m
Deal found 10/22![British Airways logo]()
$948
This Scandinavian Airlines deal was found by Cheapflights users on 10/24. 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.
Mon 11/302:31 pm -
2 stops16h 54m
Wed 12/96:15 am -
2 stops25h 50m
Deal found 10/24![Scandinavian Airlines logo]()
$748
This United Airlines deal was found by Cheapflights users on 10/25. 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 11/287:30 am -
2 stops27h 15m
Thu 12/1012:35 pm -
2 stops18h 24m
Deal found 10/25![United Airlines logo]()
$855
This Scandinavian Airlines deal was found by Cheapflights users on 10/24. 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.
Wed 12/212:36 pm -
2 stops23h 44m
Wed 12/97:00 am -
3 stops22h 38m
Deal found 10/24![Scandinavian Airlines logo]()
$861
This British Airways deal was found by Cheapflights users on 10/24. 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.
Mon 3/154:25 pm -
2 stops36h 55m
Mon 3/294:55 pm -
2 stops34h 35m
Deal found 10/24![British Airways logo]()
$984
Last-minute flights from St. Louis to HelsinkiDiscover last-minute flight deals from St. Louis to Helsinki. Data last updated October 26, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Helsinki. Data last updated October 26, 2026 and is based on user searches.
This Scandinavian Airlines deal was found by Cheapflights users on 10/23. 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 11/132:31 pm -
2 stops27h 04m
Wed 11/256:15 am -
2 stops23h 27m
Deal found 10/23![Scandinavian Airlines logo]()
$778
This Finnair deal was found by Cheapflights users on 10/21. 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 11/185:00 am -
1 stop22h 40m
Wed 11/254:50 pm -
2 stops27h 41m
Deal found 10/21![Multiple Airlines logo]()
$791
This FlightHub deal was found by Cheapflights users on 10/21. 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.
Wed 11/183:40 pm -
1 stop13h 15m
Tue 11/247:05 am -
2 stops22h 35m
Deal found 10/21![Lufthansa logo]()
$796
This KAYAK deal was found by Cheapflights users on 10/21. 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.
Wed 11/183:40 pm -
1 stop13h 15m
Fri 11/277:05 am -
1 stop14h 40m
Deal found 10/21![Lufthansa logo]()
$798
This United Airlines deal was found by Cheapflights users on 10/21. 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 11/189:59 am -
2 stops17h 51m
Thu 11/2612:35 pm -
2 stops28h 18m
Deal found 10/21![United Airlines logo]()
$799
This Cheapflightsfares deal was found by Cheapflights users on 10/25. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/302:31 pm -
2 stops16h 54m
Wed 12/96:15 am -
2 stops23h 23m
Deal found 10/25![Scandinavian Airlines logo]()
$711
This FlightHub deal was found by Cheapflights users on 10/25. 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.
Mon 11/302:31 pm -
2 stops16h 54m
Tue 12/89:00 pm -
2 stops32h 38m
Deal found 10/25![Scandinavian Airlines logo]()
$714
This Justfly.com deal was found by Cheapflights users on 10/25. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/306:50 pm -
2 stops15h 55m
Wed 12/97:05 am -
1 stop14h 40m
Deal found 10/25![Lufthansa logo]()
$780
This FlightHub deal was found by Cheapflights users on 10/21. 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.
Mon 11/306:50 pm -
2 stops15h 55m
Tue 12/87:05 am -
2 stops23h 10m
Deal found 10/21![Lufthansa logo]()
$783
One-way flights from St. Louis to HelsinkiSearch for one-way flight options from St. Louis to Helsinki. Find affordable one-way fares based on user searches. Data last updated October 26, 2026.
Search for one-way flight options from St. Louis to Helsinki. Find affordable one-way fares based on user searches. Data last updated October 26, 2026.
This American Airlines deal was found by Cheapflights users on 10/25. 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.
Mon 12/2812:14 pm -
1 stop14h 31m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/25![American Airlines logo]()
$555
This Mytrip deal was found by Cheapflights users on 10/25. 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.
Mon 12/284:05 pm -
2 stops25h 25m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/25![Multiple Airlines logo]()
$556
Find flight deals from St. Louis to Helsinki
Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Helsinki (HEL). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated October 26, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $699 (Expedia) |
One-way from | $555 (American Airlines) |
Popular in | December |
Cheapest in | February |
Average price | $981 |
Cheapflights Fare Finder
Customize your flight search to find flights from St. Louis to Helsinki 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 7,457,451 searches. Data last updated October 26, 2026.
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
Cheapest round-trip
Quickest round-trip
St. LouisHelsinki
STL Lambert-St Louis - HEL Helsinki-Vantaa
STLHEL
Lambert-St Louis
Mon 12/28
4:05 pm-1:30 am
2 stops25h 25m
Helsinki-Vantaa
Wed 12/31
12:00 am-4:00 pm
Nonstop0h 00m
$556
St. LouisHelsinki
STL Lambert-St Louis - HEL Helsinki-Vantaa
STLHEL
Lambert-St Louis
Wed 12/2
12:36 pm-10:30 am
2 stops37h 54m
Helsinki-Vantaa
Sun 12/6
4:05 pm-12:05 am
2 stops40h 00m
$748
St. LouisHelsinki
STL Lambert-St Louis - HEL Helsinki-Vantaa
STLHEL
Lambert-St Louis
Mon 11/30
2:31 pm-3:25 pm
2 stops16h 54m
Helsinki-Vantaa
Wed 12/9
6:15 am-12:05 am
2 stops25h 50m
$748
St. LouisHelsinki
STL Lambert-St Louis - HEL Helsinki-Vantaa
STLHEL
Lambert-St Louis
Sun 11/29
7:30 am-6:45 pm
2 stops27h 15m
Helsinki-Vantaa
Thu 12/10
12:35 pm-10:59 pm
2 stops18h 24m
$804
St. LouisHelsinki
STL Lambert-St Louis - HEL Helsinki-Vantaa
STLHEL
Lambert-St Louis
Tue 12/1
6:32 am-4:40 pm
2 stops26h 08m
Helsinki-Vantaa
Wed 12/9
2:05 pm-8:32 pm
2 stops38h 27m
$805
St. LouisHelsinki
STL Lambert-St Louis - HEL Helsinki-Vantaa
STLHEL
Lambert-St Louis
Sat 11/28
7:30 am-6:45 pm
2 stops27h 15m
Helsinki-Vantaa
Thu 12/10
12:35 pm-10:59 pm
2 stops18h 24m
$855
St. LouisHelsinki
STL Lambert-St Louis - HEL Helsinki-Vantaa
STLHEL
Lambert-St Louis
Wed 12/2
12:36 pm-8:20 pm
2 stops23h 44m
Helsinki-Vantaa
Wed 12/9
7:00 am-9:38 pm
3 stops22h 38m
$861
St. LouisHelsinki
STL Lambert-St Louis - HEL Helsinki-Vantaa
STLHEL
Lambert-St Louis
Sun 2/28
12:59 pm-12:20 pm
2 stops39h 21m
Helsinki-Vantaa
Thu 3/4
12:30 pm-8:16 pm
1 stop15h 46m
$948
St. LouisHelsinki
STL Lambert-St Louis - HEL Helsinki-Vantaa
STLHEL
Lambert-St Louis
Mon 3/15
4:25 pm-12:20 pm
2 stops36h 55m
Helsinki-Vantaa
Mon 3/29
4:55 pm-7:30 pm
2 stops34h 35m
$984
Sorted by cheapest first
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 October.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on St. Louis-Helsinki flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on St. Louis-Helsinki flight deals on Cheapflights vs. FlightHub >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 FlightHub the most. FlightHub 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.
STL-HEL
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
Reviews of airlines servicing Helsinki
Get insights into the airlines that provide service to Helsinki. 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 Helsinki. Reviews last updated October 26, 2026.
Read through reviews of airlines operating flights from St. Louis to Helsinki, such as Finnair and American Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Entertainment
6.9
Comfort
7.4
Crew
8.2
Overall
7.6
Boarding
7.6
Food
6.7
Reviews
1 / 20
6.0
GoodGurinder,Aug 2026
BKK - HEL
Entertainment
6.9
Comfort
7.4
Crew
8.2
Overall
7.6
Boarding
7.6
Food
6.7
Reviews
1 / 20
6.0
GoodGurinder,Aug 2026
BKK - HEL
Entertainment
6.9
Comfort
7.4
Crew
8.2
Overall
7.6
Boarding
7.6
Food
6.7
Reviews
1 / 20
6.0
GoodGurinder,Aug 2026
BKK - HEL
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.
Traveling to a place near Helsinki?
Book flights to Helsinki if you plan to visit one of these locationsVantaa
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Other flights to Helsinki
Explore flights to Helsinki departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on October 26, 2026.
St. Louis and Helsinki flights
Browse other St. Louis and Helsinki flight options. Last updated on October 26, 2026.
Other flights from St. Louis
Browse through other flights departing from St. Louis. Flights are based on user searches made on Cheapflights and were last updated on October 26, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Top 2 airlines flying from St. Louis to Helsinki
Discover the top 2 airlines that operate flights from St. Louis to Helsinki. 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 7,457,451 searches. Data last updated October 26, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$433 | Average$747 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$484 | Average$791 | FlexibilityNo cancel fee | On-time71% |