$725+ 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 1/6. Fares are subject to change and may not be available on all flights or dates of travel.
STL — HEL
Nov 8 — Nov 151
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
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 9, 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 9, 2026.
This Delta deal was found by Cheapflights users on 10/6. 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.
Thu 12/311:00 pm -
2 stops19h 40m
Wed 1/136:40 am -
2 stops18h 10m
Deal found 10/6![Delta logo]()
$846
This FlightHub deal was found by Cheapflights users on 10/7. 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 10/71:29 pm -
2 stops21h 26m
Mon 10/127:40 pm -
2 stops25h 45m
Deal found 10/7![Lufthansa logo]()
$945
This FlightHub deal was found by Cheapflights users on 10/7. 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 10/2210:00 am -
2 stops29h 00m
Fri 10/3012:30 pm -
1 stop16h 29m
Deal found 10/7![British Airways logo]()
$973
This FlightHub deal was found by Cheapflights users on 10/7. 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 10/221:29 pm -
2 stops14h 36m
Fri 10/3012:35 pm -
2 stops17h 49m
Deal found 10/7![Lufthansa logo]()
$974
This American Airlines deal was found by Cheapflights users on 10/7. 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.
Thu 10/225:27 pm -
1 stop12h 48m
Fri 10/3012:30 pm -
1 stop18h 12m
Deal found 10/7![American Airlines logo]()
$976
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 9, 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 9, 2026.
This Delta deal was found by Cheapflights users on 10/6. 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.
Wed 1/610:45 am -
2 stops22h 40m
Mon 1/112:05 pm -
2 stops35h 56m
Deal found 10/6![Delta logo]()
$725
This Finnair deal was found by Cheapflights users on 10/8. 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.
Sat 12/268:26 am -
1 stop18h 19m
Mon 1/44:00 pm -
2 stops35h 41m
Deal found 10/8![Multiple Airlines logo]()
$1,297
This American Airlines deal was found by Cheapflights users on 10/8. 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 12/268:26 am -
1 stop19h 14m
Mon 1/41:25 pm -
1 stop17h 10m
Deal found 10/8![American Airlines logo]()
$1,338
This Delta deal was found by Cheapflights users on 10/6. 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.
Wed 1/610:45 am -
2 stops22h 40m
Wed 1/136:40 am -
2 stops22h 11m
Deal found 10/6![Delta logo]()
$725
This Delta deal was found by Cheapflights users on 10/6. 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 1/510:45 am -
2 stops22h 40m
Mon 1/112:05 pm -
2 stops35h 56m
Deal found 10/6![Delta logo]()
$762
This Delta deal was found by Cheapflights users on 10/6. 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.
Thu 12/311:00 pm -
2 stops19h 40m
Tue 1/126:40 am -
2 stops21h 57m
Deal found 10/6![Delta logo]()
$846
This Delta deal was found by Cheapflights users on 10/6. 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.
Thu 12/311:00 pm -
2 stops19h 40m
Mon 1/112:05 pm -
2 stops35h 56m
Deal found 10/6![Delta logo]()
$846
This Delta deal was found by Cheapflights users on 10/5. 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.
Thu 10/226:05 pm -
2 stops15h 35m
Fri 10/306:40 am -
2 stops23h 41m
Deal found 10/5![Delta logo]()
$992
This Delta deal was found by Cheapflights users on 10/7. 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.
Sat 11/214:39 pm -
2 stops16h 46m
Sat 11/286:40 am -
2 stops23h 24m
Deal found 10/7![Delta logo]()
$1,034
Last-minute flights from St. Louis to HelsinkiDiscover last-minute flight deals from St. Louis to Helsinki. Data last updated October 9, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Helsinki. Data last updated October 9, 2026 and is based on user searches.
This FlightHub deal was found by Cheapflights users on 10/7. 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 10/221:29 pm -
2 stops14h 36m
Fri 10/307:05 am -
1 stop14h 40m
Deal found 10/7![Lufthansa logo]()
$967
This FlightHub deal was found by Cheapflights users on 10/7. 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 10/2210:00 am -
2 stops29h 00m
Fri 10/3012:30 pm -
1 stop16h 29m
Deal found 10/7![British Airways logo]()
$973
This American Airlines deal was found by Cheapflights users on 10/7. 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.
Thu 10/225:27 pm -
1 stop12h 48m
Fri 10/3012:30 pm -
1 stop18h 12m
Deal found 10/7![American Airlines logo]()
$976
This Delta deal was found by Cheapflights users on 10/6. 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.
Thu 10/226:05 pm -
2 stops15h 35m
Fri 10/306:40 am -
2 stops23h 41m
Deal found 10/6![Delta logo]()
$992
This United Airlines deal was found by Cheapflights users on 10/7. 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.
Thu 10/227:30 am -
3 stops27h 25m
Fri 10/3012:35 pm -
2 stops17h 49m
Deal found 10/7![United Airlines logo]()
$1,288
This Mytrip deal was found by Cheapflights users on 10/7. 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.
Thu 10/224:30 pm -
3 stops22h 25m
Fri 10/308:15 am -
3 stops41h 59m
Deal found 10/7![Multiple Airlines logo]()
$1,450
This Delta deal was found by Cheapflights users on 10/7. 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.
Sat 11/214:39 pm -
2 stops16h 46m
Sat 11/286:40 am -
2 stops23h 24m
Deal found 10/7![Delta logo]()
$1,034
This American Airlines deal was found by Cheapflights users on 10/7. 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 11/2111:24 am -
2 stops18h 31m
Sat 11/281:25 pm -
1 stop16h 25m
Deal found 10/7![American Airlines logo]()
$1,133
This Gurufare deal was found by Cheapflights users on 10/7. 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.
Sat 11/216:55 pm -
1 stop32h 45m
Sat 11/281:25 pm -
1 stop16h 25m
Deal found 10/7![Finnair logo]()
$1,410
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 9, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $692 (Expedia) |
Popular in | December |
Cheapest in | February |
Average price | $747 |
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 9, 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
St. LouisHelsinki
STL Lambert-St Louis - HEL Helsinki-Vantaa
STLHEL
Lambert-St Louis
Wed 1/6
10:45 am-5:25 pm
2 stops22h 40m
Helsinki-Vantaa
Mon 1/11
2:05 pm-6:01 pm
2 stops35h 56m
$725
St. LouisHelsinki
STL Lambert-St Louis - HEL Helsinki-Vantaa
STLHEL
Lambert-St Louis
Wed 1/6
10:45 am-5:25 pm
2 stops22h 40m
Helsinki-Vantaa
Wed 1/13
6:40 am-8:51 pm
2 stops22h 11m
$725
St. LouisHelsinki
STL Lambert-St Louis - HEL Helsinki-Vantaa
STLHEL
Lambert-St Louis
Tue 1/5
10:45 am-5:25 pm
2 stops22h 40m
Helsinki-Vantaa
Mon 1/11
2:05 pm-6:01 pm
2 stops35h 56m
$762
St. LouisHelsinki
STL Lambert-St Louis - HEL Helsinki-Vantaa
STLHEL
Lambert-St Louis
Thu 12/31
1:00 pm-4:40 pm
2 stops19h 40m
Helsinki-Vantaa
Tue 1/12
6:40 am-8:37 pm
2 stops21h 57m
$846
St. LouisHelsinki
STL Lambert-St Louis - HEL Helsinki-Vantaa
STLHEL
Lambert-St Louis
Thu 12/31
1:00 pm-4:40 pm
2 stops19h 40m
Helsinki-Vantaa
Mon 1/11
2:05 pm-6:01 pm
2 stops35h 56m
$846
St. LouisHelsinki
STL Lambert-St Louis - HEL Helsinki-Vantaa
STLHEL
Lambert-St Louis
Thu 10/22
6:05 pm-5:40 pm
2 stops15h 35m
Helsinki-Vantaa
Fri 10/30
6:40 am-11:21 pm
2 stops23h 41m
$992
St. LouisHelsinki
STL Lambert-St Louis - HEL Helsinki-Vantaa
STLHEL
Lambert-St Louis
Sat 11/21
4:39 pm-5:25 pm
2 stops16h 46m
Helsinki-Vantaa
Sat 11/28
6:40 am-10:04 pm
2 stops23h 24m
$1,034
St. LouisHelsinki
STL Lambert-St Louis - HEL Helsinki-Vantaa
STLHEL
Lambert-St Louis
Sat 12/26
8:26 am-10:45 am
1 stop18h 19m
Helsinki-Vantaa
Mon 1/4
4:00 pm-7:41 pm
2 stops35h 41m
$1,297
Quickest round-trip
St. LouisHelsinki
STL Lambert-St Louis - HEL Helsinki-Vantaa
STLHEL
Lambert-St Louis
Sat 12/26
8:26 am-11:40 am
1 stop19h 14m
Helsinki-Vantaa
Mon 1/4
1:25 pm-10:35 pm
1 stop17h 10m
$1,338
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 9, 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.
Boarding
7.6
Entertainment
6.9
Crew
8.2
Comfort
7.4
Food
6.7
Overall
7.6
Reviews
1 / 20
6.0
GoodGurinder,Aug 2026
BKK - HEL
Boarding
7.6
Entertainment
6.9
Crew
8.2
Comfort
7.4
Food
6.7
Overall
7.6
Reviews
1 / 20
6.0
GoodGurinder,Aug 2026
BKK - HEL
Boarding
7.6
Entertainment
6.9
Crew
8.2
Comfort
7.4
Food
6.7
Overall
7.6
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 9, 2026.
St. Louis and Helsinki flights
Browse other St. Louis and Helsinki flight options. Last updated on October 9, 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 9, 2026.
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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 9, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$433 | Average$747 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$484 | Average$764 | FlexibilityNo cancel fee | On-time71% |