$495+ 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 10/30. Fares are subject to change and may not be available on all flights or dates of travel.
STL — HEL
Jul 30 — Aug 61

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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 July 25, 2024.

Popular in

June

Cheapest in

October

Average price

$1,474

Round-trip from

$495
(British Airways)
High demand for flights, 31% potential price rise
Best time to find cheap flights, 50% potential price drop
Average for round-trip flights in July 2024
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 Sunday can be a cost-effective option. It’s possible to save up to 76% 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 October. Prices to Helsinki from St. Louis average $1,051. You can even find prices in October for less than $1,051, as users have found deals to Helsinki from as low as $496. 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 44%.

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 23% on the flight price compared to flying at noon, which is usually more expensive.

Cheap St. Louis to Helsinki flights in July & August 2024

Find cheap flight options from St. Louis to Helsinki specifically for the months of July and August 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 2,752,877 searches. Prices were last updated on July 25, 2024.
These are some of the best deals we've found on flights to Helsinki in 2024 at this time. For more flight deals, be sure to check back very soon.
This United deal was found by Cheapflights users on 7/25. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/228:05 amSTL - HEL
2 stops26h 40mUnited Airlines
Thu 8/296:20 amHEL - STL
2 stops40h 31mUnited Airlines
Deal found 7/25$771
This Air France deal was found by Cheapflights users on 7/25. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/245:27 pmSTL - HEL
2 stops15h 13mAir France
Sat 8/316:40 amHEL - STL
2 stops20h 40mAir France
Deal found 7/25$831
This United deal was found by Cheapflights users on 7/25. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/246:34 amSTL - HEL
2 stops21h 26mMultiple Airlines
Sat 8/316:15 pmHEL - STL
1 stop27h 15mMultiple Airlines
Deal found 7/25$922
This United deal was found by Cheapflights users on 7/25. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/229:30 amSTL - HEL
2 stops25h 15mUnited Airlines
Thu 8/291:25 pmHEL - STL
1 stop32h 05mUnited Airlines
Deal found 7/25$1,012
This United deal was found by Cheapflights users on 7/25. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/245:20 pmSTL - HEL
3 stops34h 40mMultiple Airlines
Sat 8/316:15 pmHEL - STL
2 stops28h 36mMultiple Airlines
Deal found 7/25$1,050
This Finnair deal was found by Cheapflights users on 7/25. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/249:49 amSTL - HEL
1 stop16h 56mMultiple Airlines
Sat 8/3112:25 pmHEL - STL
1 stop14h 14mMultiple Airlines
Deal found 7/25$1,064
This Finnair deal was found by Cheapflights users on 7/25. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/229:49 amSTL - HEL
1 stop16h 56mMultiple Airlines
Thu 8/2912:25 pmHEL - STL
1 stop14h 14mMultiple Airlines
Deal found 7/25$1,166

St. Louis to Helsinki 2024 flight deals

Discover exclusive flight deals for travel between St. Louis and Helsinki in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 2,752,877 searches. Data last updated July 25, 2024.
These are some of the best deals we've found on flights to Helsinki in 2024 at this time. For more flight deals, be sure to check back very soon.
This British Airways deal was found by Cheapflights users on 7/25. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/306:24 pmSTL - HEL
2 stops19h 41mBritish Airways
Fri 11/812:25 pmHEL - STL
1 stop13h 51mBritish Airways
Deal found 7/25$495
This American Airlines deal was found by Cheapflights users on 7/25. 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.
Wed 10/301:38 pmSTL - HEL
2 stops15h 42mMultiple Airlines
Wed 11/64:45 pmHEL - STL
2 stops23h 31mMultiple Airlines
Deal found 7/25$500
This American Airlines deal was found by Cheapflights users on 7/25. 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.
Wed 10/301:38 pmSTL - HEL
2 stops15h 42mMultiple Airlines
Fri 11/812:25 pmHEL - STL
2 stops17h 06mMultiple Airlines
Deal found 7/25$501
This British Airways deal was found by Cheapflights users on 7/25. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/274:18 pmSTL - HEL
2 stops15h 57mBritish Airways
Wed 11/67:50 amHEL - STL
2 stops20h 23mBritish Airways
Deal found 7/25$515
This Finnair deal was found by Cheapflights users on 7/25. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/275:36 amSTL - HEL
1 stop22h 14mMultiple Airlines
Wed 11/64:00 pmHEL - STL
2 stops34h 16mMultiple Airlines
Deal found 7/25$520
This Orbitz deal was found by Cheapflights users on 7/25. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/304:45 pmSTL - HEL
1 stop13h 55mLufthansa
Fri 11/86:50 amHEL - STL
1 stop15h 05mLufthansa
Deal found 7/25$522
This Expedia deal was found by Cheapflights users on 7/25. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/305:40 pmSTL - HEL
2 stops22h 45mLufthansa
Wed 11/66:40 amHEL - STL
1 stop15h 15mLufthansa
Deal found 7/25$526
This Expedia deal was found by Cheapflights users on 7/25. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/710:04 amSTL - HEL
2 stops27h 01mBritish Airways
Fri 11/1512:25 pmHEL - STL
1 stop18h 11mBritish Airways
Deal found 7/25$545
This Finnair deal was found by Cheapflights users on 7/25. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/79:39 amSTL - HEL
1 stop17h 11mMultiple Airlines
Fri 11/1512:25 pmHEL - STL
1 stop18h 11mMultiple Airlines
Deal found 7/25$547

Find flights from St. Louis to Helsinki within your budget

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 2,752,877 searches. Data last updated July 25, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$495 - $831

Route

Depart

Return

Price

Lambert-St LouisHelsinki-Vantaa

STL - HEL

STLHEL

Lambert-St Louis

Wed 10/30

2 stops19h 41m

Helsinki-Vantaa

Fri 11/8

1 stop13h 51m

$495

Lambert-St LouisHelsinki-Vantaa

STL - HEL

STLHEL

Lambert-St Louis

Wed 10/30

2 stops15h 42m

Helsinki-Vantaa

Wed 11/6

2 stops23h 31m

$500

Lambert-St LouisHelsinki-Vantaa

STL - HEL

STLHEL

Lambert-St Louis

Wed 10/30

2 stops15h 42m

Helsinki-Vantaa

Fri 11/8

2 stops17h 06m

$501

Lambert-St LouisHelsinki-Vantaa

STL - HEL

STLHEL

Lambert-St Louis

Wed 10/30

1 stop13h 55m

Helsinki-Vantaa

Fri 11/8

1 stop15h 05m

$522

Lambert-St LouisHelsinki-Vantaa

STL - HEL

STLHEL

Lambert-St Louis

Thu 11/7

2 stops13h 39m

Helsinki-Vantaa

Fri 11/15

2 stops17h 06m

$552

Lambert-St LouisHelsinki-Vantaa

STL - HEL

STLHEL

Lambert-St Louis

Fri 11/1

1 stop13h 55m

Helsinki-Vantaa

Wed 11/6

2 stops18h 25m

$582

Lambert-St LouisHelsinki-Vantaa

STL - HEL

STLHEL

Lambert-St Louis

Wed 10/30

3 stops20h 30m

Helsinki-Vantaa

Fri 11/8

2 stops40h 16m

$653

Lambert-St LouisHelsinki-Vantaa

STL - HEL

STLHEL

Lambert-St Louis

Sat 11/2

2 stops18h 19m

Helsinki-Vantaa

Wed 11/6

2 stops20h 39m

$719

Lambert-St LouisHelsinki-Vantaa

STL - HEL

STLHEL

Lambert-St Louis

Sat 8/24

2 stops15h 13m

Helsinki-Vantaa

Sat 8/31

2 stops20h 40m

$831

Flights are sorted by cheapest first

Deals found on 7/25

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 July 21, 2024.
Morning
Noon
Afternoon
Evening
All times are departure.
Travelers seeking maximum savings on their St. Louis to Helsinki flight should consider departing on Monday 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.
Search Deals

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 July 25, 2024.
See what other customers who have flown with United Airlines, British Airways and Lufthansa from St. Louis to Helsinki have to say. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
8.0
Very good
9,630 reviews

Boarding

8.2

Entertainment

8.0

Crew

8.6

Food

7.4

Comfort

7.9

Overall

8.0

Reviews

1 / 10

One of the worst flights ever. I got to the airport early for my 6:48 pm flight and tried to get on the 4:30 ish flight. The gate agent was one of the worst customer service people in my 20 yrs of flying Delta. Very rude and wouldn’t even talk to me about riding standby. Then flight took off 3 hrs late and when Landed in Atlanta, the gate people wouldn’t even try to get me on the plane. It was still there but door was closed. For all of my almost 2 million miles, the worst experience from Delta. I am highly disappointed as it was not my fault I have to sleep in Atlanta and not Jacksonville Florida

8.0
Very good
9,630 reviews
8.0
Very good
9,630 reviews

Boarding

8.2

Entertainment

8.0

Crew

8.6

Food

7.4

Comfort

7.9

Overall

8.0

Reviews

1 / 10

One of the worst flights ever. I got to the airport early for my 6:48 pm flight and tried to get on the 4:30 ish flight. The gate agent was one of the worst customer service people in my 20 yrs of flying Delta. Very rude and wouldn’t even talk to me about riding standby. Then flight took off 3 hrs late and when Landed in Atlanta, the gate people wouldn’t even try to get me on the plane. It was still there but door was closed. For all of my almost 2 million miles, the worst experience from Delta. I am highly disappointed as it was not my fault I have to sleep in Atlanta and not Jacksonville Florida

7.5
Good
1,622 reviews
8.0
Very good
9,630 reviews

Boarding

8.2

Entertainment

8.0

Crew

8.6

Food

7.4

Comfort

7.9

Overall

8.0

Reviews

1 / 10

One of the worst flights ever. I got to the airport early for my 6:48 pm flight and tried to get on the 4:30 ish flight. The gate agent was one of the worst customer service people in my 20 yrs of flying Delta. Very rude and wouldn’t even talk to me about riding standby. Then flight took off 3 hrs late and when Landed in Atlanta, the gate people wouldn’t even try to get me on the plane. It was still there but door was closed. For all of my almost 2 million miles, the worst experience from Delta. I am highly disappointed as it was not my fault I have to sleep in Atlanta and not Jacksonville Florida

7.4
Good
10,000 reviews
8.0
Very good
9,630 reviews

Boarding

8.2

Entertainment

8.0

Crew

8.6

Food

7.4

Comfort

7.9

Overall

8.0

Reviews

1 / 10

One of the worst flights ever. I got to the airport early for my 6:48 pm flight and tried to get on the 4:30 ish flight. The gate agent was one of the worst customer service people in my 20 yrs of flying Delta. Very rude and wouldn’t even talk to me about riding standby. Then flight took off 3 hrs late and when Landed in Atlanta, the gate people wouldn’t even try to get me on the plane. It was still there but door was closed. For all of my almost 2 million miles, the worst experience from Delta. I am highly disappointed as it was not my fault I have to sleep in Atlanta and not Jacksonville Florida

7.3
Good
10,000 reviews
8.0
Very good
9,630 reviews

Boarding

8.2

Entertainment

8.0

Crew

8.6

Food

7.4

Comfort

7.9

Overall

8.0

Reviews

1 / 10

One of the worst flights ever. I got to the airport early for my 6:48 pm flight and tried to get on the 4:30 ish flight. The gate agent was one of the worst customer service people in my 20 yrs of flying Delta. Very rude and wouldn’t even talk to me about riding standby. Then flight took off 3 hrs late and when Landed in Atlanta, the gate people wouldn’t even try to get me on the plane. It was still there but door was closed. For all of my almost 2 million miles, the worst experience from Delta. I am highly disappointed as it was not my fault I have to sleep in Atlanta and not Jacksonville Florida

6.9
Okay
7,353 reviews
8.0
Very good
9,630 reviews

Boarding

8.2

Entertainment

8.0

Crew

8.6

Food

7.4

Comfort

7.9

Overall

8.0

Reviews

1 / 10

One of the worst flights ever. I got to the airport early for my 6:48 pm flight and tried to get on the 4:30 ish flight. The gate agent was one of the worst customer service people in my 20 yrs of flying Delta. Very rude and wouldn’t even talk to me about riding standby. Then flight took off 3 hrs late and when Landed in Atlanta, the gate people wouldn’t even try to get me on the plane. It was still there but door was closed. For all of my almost 2 million miles, the worst experience from Delta. I am highly disappointed as it was not my fault I have to sleep in Atlanta and not Jacksonville Florida

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.
  • Can I find flights from St. Louis to Helsinki for under $500 on Cheapflights?

    Yes, there are multiple flights from St. Louis to Helsinki for under $500. The cheapest flight booked recently is on British Airways for just $495, but on average you can expect to pay $590.

  • What are the cheapest airlines flying from St. Louis to Helsinki round-trip?

    British Airways, at $495, was found to be the cheapest airline from St. Louis to Helsinki.Alternate airlines to your destination round-trip include Lufthansa and American Airlines. These flights start at 52% lower than the current average price 3 months from now.

  • 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.

  • How recently were the St. Louis to Helsinki flight deals updated?

    The St. Louis to Helsinki flight deals you see on this page were last updated on 7/25.

  • 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 $632). Flying from St. Louis to Helsinki in June is currently the most expensive (average of $1,227). 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.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

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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 2,752,877 searches. Data last updated July 25, 2024.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$507Average$1,154FlexibilityNo cancel feeOn-timeN/A
KLMCheapest$528Average$528FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$559Average$896FlexibilityNo cancel feeOn-time69%
FinnairCheapest$692Average$1,066FlexibilityNo cancel feeOn-time76%
American AirlinesCheapest$731Average$1,531FlexibilityNo cancel feeOn-time71%
LufthansaCheapest$771Average$1,260FlexibilityNo cancel feeOn-time76%
British AirwaysCheapest$879Average$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.
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