Cheap flights from St. Louis (STL) to Helsinki (HEL) from $543

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/17. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
STL — HEL
Jun 10 — Jun 171

The best prices from Lambert-St Louis to Helsinki-Vantaa are usually found in October or November, booked 17 days in advance, depart on a Thursday or Tuesday and return on a Friday

Cheap 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 June 5, 2024.

Popular in

June

Cheapest in

October

Round-trip from

$631

One-way from

$543
High demand for flights, 30% potential price rise
Best time to find cheap flights, 50% potential price drop
From Lambert-St Louis to Helsinki-Vantaa
One-way flight from Lambert-St Louis to Helsinki-Vantaa

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 38% on your flight compared to booking on days when demand is much higher.

How far in advance should I book a flight from St. Louis to Helsinki?

Find a great deal and save up to 79% by booking at least 18 days prior to your desired departure date, rather than waiting until the week of travel. According to our data, there are a number of flights available from St. Louis to Helsinki within the next two weeks, with the cheapest ticket starting at $900.

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

The best pricing can be found in the month of October. Prices to Helsinki from St. Louis average $1,064. You can even find prices in October for less than $1,064, as users have found deals to Helsinki from as low as $501. The month of June 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 43%.

What is the cheapest time of day to fly from STL to HEL?

It’s typically best to fly out from St. Louis to Helsinki in the morning. Doing so could potentially save you 22% on the flight price compared to flying at noon, which is usually more expensive.

One-way flights to Helsinki from St. Louis

Search for one-way flight options from St. Louis to Helsinki. Find affordable one-way fares based on user searches. Compare prices and availability to plan your one-way journey according to your preferred dates and budget. Over the last 7 days, Cheapflights users made 3,050,429 searches. Data last updated June 5, 2024.
Sat 8/177:29 pmSTL - HEL
3 stops34h 31mMultiple Airlines
Deal found 6/4$543
Sat 8/178:10 amSTL - HEL
2 stops46h 30mMultiple Airlines
Deal found 6/4$644
Sat 8/179:44 amSTL - HEL
1 stop20h 31mAmerican Airlines
Deal found 6/4$744

How far ahead should I book a flight from St. Louis to Helsinki?

Use this chart to determine the optimal time to book a round-trip flight from St. Louis to Helsinki. Price data was last updated on May 31, 2024.
The best time to book flights from St. Louis to Helsinki is 17 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.
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What is the cheapest day to fly from St. Louis to Helsinki?

Use this chart to determine the cheapest time to fly round-trip from St. Louis to Helsinki. Price data was last updated on June 2, 2024.
Morning
Noon
Afternoon
Evening
All times are departure.
Travelers seeking maximum savings on their St. Louis to Helsinki flight should consider departing on Thursday afternoons when fares are most often at their lowest. Sunday at noon flights should be avoided if possible as fares are typically the most expensive at this time.
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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.
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.

Temperature and rainfall in Helsinki by month

Plan your trip to Helsinki by taking into account the average temperature and rainfall totals by month.

HEL

Temperature

21.2 - 60.8 °F

If weather is an important factor for your trip to Helsinki, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 60.8 F. Travelers looking to avoid the cold should look outside of February, when temperatures are typically at their lowest (around 21.2 F).

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 June 5, 2024.
7.3
Good
14,229 reviews

Comfort

7.2

Crew

8.0

Entertainment

7.1

Food

6.6

Boarding

7.6

Overall

7.3

Reviews

1 / 10

Entertainment was ok, no delays either. The food was just ok, the trays were dirty and overall the plane seemed dated.

7.3
Good
14,229 reviews
7.3
Good
14,229 reviews

Comfort

7.2

Crew

8.0

Entertainment

7.1

Food

6.6

Boarding

7.6

Overall

7.3

Reviews

1 / 10

Entertainment was ok, no delays either. The food was just ok, the trays were dirty and overall the plane seemed dated.

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.
  • 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.

  • Can I find deals for flights from St. Louis to Helsinki that include extra baggage allowance?

    The amount of baggage you can bring on your St. Louis to Helsinki flight depends on the airline and the type of fare you've chosen. After entering your flight details, you'll be able to view the specific baggage policies for each deal in the search results. Keep in mind that certain deals may offer additional baggage allowance.

  • Can I find deals on flights from St. Louis to Helsinki with specific airlines?

    Yes, Cheapflights allows you to browse and filter St. Louis to Helsinki flight deals by airline. After entering your origin and destination, use the available filters to view flights offered by airlines.

  • Can I find deals for flights from St. Louis to Helsinki that include hotel bookings?

    Yes. In addition to deals on St. Louis to Helsinki flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from St. Louis to Helsinki?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to Helsinki.

  • Can I find deals for business class flights from St. Louis to Helsinki?

    Yes. Cheapflights offers flight deals from St. Louis to Helsinki by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • Can I find deals for flights from St. Louis to Helsinki that allow pets onboard?

    Many airlines flying from St. Louis to Helsinki offer the option to travel with pets. After selecting a flight deal, you can find more information about the airline's pet policy on their official website or by contacting the airline directly. Please note that additional fees and restrictions may apply.

  • Can I find deals on last-minute flights from St. Louis to Helsinki?

    Yes, you can often find last-minute deals on St. Louis to Helsinki flights on Cheapflights. However, these deals can vary and may not always be available. We recommend checking back frequently or signing up for price alerts for the most up-to-date deals.

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

  • What is the cheapest month to book a flight from St. Louis to Helsinki?

    Currently, January is the cheapest month in which you can book a flight from St. Louis to Helsinki (average of $631). Flying from St. Louis to Helsinki in June is currently the most expensive (average of $1,255). 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.

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Alternative routes for St. Louis to Helsinki
See prices for flight routes from nearby airports that may be better suited for you.

Top 7 airlines flying from St. Louis to Helsinki

Discover the top 7 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 3,050,429 searches. Data last updated June 5, 2024.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$507Average$1,214FlexibilityNo cancel feeOn-timeN/A
KLMCheapest$528Average$528FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$559Average$896FlexibilityNo cancel feeOn-time69%
FinnairCheapest$692Average$1,066FlexibilityNo cancel feeOn-time76%
LufthansaCheapest$707Average$1,260FlexibilityNo cancel feeOn-time76%
American AirlinesCheapest$812Average$1,531FlexibilityNo cancel feeOn-time71%
British AirwaysCheapest$890Average$1,473FlexibilityNo cancel feeOn-time70%

Search flights from St. Louis to Helsinki by cabin class

Find flights from St. Louis to Helsinki, based on your preferred cabin class, be it economy, premium economy, business, or first class.

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from St. Louis to Helsinki?

Deals for St. Louis to Helsinki flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

Why should you use Cheapflights to find cheap flight tickets from St. Louis to Helsinki?

Cheapflights simply makes it quick and affordable to book flights from St. Louis to Helsinki by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

Can Cheapflights find flights from St. Louis to Helsinki with no change fees?

Certainly. Search results for flights to Helsinki from St. Louis shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

Can Cheapflights notify me if prices for flights from St. Louis to Helsinki become cheaper?

Of course! You can now track prices for flights from St. Louis to Helsinki and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

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