Cheap flights from St. Louis (STL) to Helsinki (HEL) from $438

This is the cheapest one-way flight price, found on 9/27. Prices may vary by date and flight preferences.
STL — HEL
Oct 3 — Oct 101

How to find the cheapest flight from St. Louis (STL) to Helsinki (HEL)

All the information you need to plan the best STL to HEL flight in 2023: compare St. Louis to Helsinki flight prices with the expected peak season, weather and rainfall in Helsinki.

Popular in

January

Cheapest in

May

Round-trip from

$552

One-way from

$477
High demand for flights, 57% potential price rise
Best time to find cheap flights, 62% potential price drop
From Lambert-St Louis to Helsinki-Vantaa
One-way flight from Lambert-St Louis to Helsinki-Vantaa

STL - HEL

Price

$552 - $1,441

HEL

Temperature

21.2 - 60.8 °F

HEL

Rainfall

1.2 - 2.8 inches

What is the cheapest day to fly round-trip from St. Louis to Helsinki?

Users have found that leaving on a Wednesday can be a cost-effective option. It’s possible to save up to 17% on your flight compared to booking on days when demand is much higher.

What is the cheapest month to fly from St. Louis to Helsinki?

The best pricing can be found in the month of May. Prices to Helsinki from St. Louis average $900. You can even find prices in May for less than $900, as users have found deals to Helsinki from as low as $340. The month of January appears to be one of the more expensive times to travel to Helsinki from St. Louis. Flying in the targeted month can save you up to 132%.

When is the cheapest time to fly from St. Louis to Helsinki (STL - HEL)?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from St. Louis to Helsinki as you normally would.

Cheap American Airlines flights from St. Louis to Helsinki

Cheap St. Louis to Helsinki flights in September & October 2023

The best prices found for STL to HEL flights for September, October

St. Louis to Helsinki 2023 flight deals

Cheap flights to Helsinki from St. Louis found for this year

St. Louis to Helsinki flights leaving soon

Late deals on return flights to Helsinki from St. Louis, departing today and this week

One-way flights to Helsinki from St. Louis

The cheapest one-way flights from St. Louis to Helsinki

Reviews of airlines servicing Helsinki

American Airlines
7.2
Good
2,635 reviews

Boarding

7.5

Overall

7.2

Entertainment

6.9

Food

6.5

Comfort

7.3

Crew

7.9

Reviews

1 / 10

Worst Airlines - services suck. Stuck at JFK whole night with 2 small kids - they didnt care even infant baby. Never ever fly American Airlines again - Peace !!

American Airlines
7.2
Good
2,635 reviews
American Airlines
7.2
Good
2,635 reviews

Boarding

7.5

Overall

7.2

Entertainment

6.9

Food

6.5

Comfort

7.3

Crew

7.9

Reviews

1 / 10

Worst Airlines - services suck. Stuck at JFK whole night with 2 small kids - they didnt care even infant baby. Never ever fly American Airlines again - Peace !!

Lufthansa
6.7
Okay
1,577 reviews
American Airlines
7.2
Good
2,635 reviews

Boarding

7.5

Overall

7.2

Entertainment

6.9

Food

6.5

Comfort

7.3

Crew

7.9

Reviews

1 / 10

Worst Airlines - services suck. Stuck at JFK whole night with 2 small kids - they didnt care even infant baby. Never ever fly American Airlines again - Peace !!

Related info for your journey

Useful info, stats and facts about St. Louis to Helsinki flights.

Are there last-minute flights available from St. Louis to Helsinki for under $1,500?

There are currently 5+ open flights from St. Louis to Helsinki within the next 7 days for less than $1,500.

What are the most popular airlines that fly from St. Louis to Helsinki?

What does STL to HEL mean?

Lambert-St Louis Airport is STL and Helsinki-Vantaa Airport is HEL. These codes are created by the International Air Transport Association (IATA) and airlines use them to identify the departing and arrival airports in the flight routes they service.

Top 5 airlines flying from St. Louis to Helsinki

The chart below displays the airlines Cheapflights users traveling from St. Louis to Helsinki choose most often. Cheapest and average prices are based on aggregated data from the past 12 months.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest$518Average$883FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
KLMCheapest$528Average$549FlexibilityNo cancel feeOn-time75%
Search KLM flights
FinnairCheapest$559Average$978FlexibilityNo cancel feeOn-time76%
Search Finnair flights
United AirlinesCheapest$563Average$844FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
American AirlinesCheapest$571Average$1,067FlexibilityNo cancel feeOn-time71%
Search American Airlines flights

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