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STL - HEL

Find cheap flights from St. Louis to Helsinki from $829

This is the cheapest round-trip flight price found by a KAYAK user in the last 72 hours by searching for a flight from St. Louis to Helsinki departing on 10/16. 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.
1 adult
0 bags
Thu 5/30
Thu 6/6

Search hundreds of travel sites at once for deals on flights to Helsinki

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from St. Louis to Helsinki.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from St. Louis to Helsinki.
In the last 7 days travelers have searched 43,983,279 times on KAYAK, and here is why:

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Cheap flight deals from St. Louis to Helsinki (STL-HEL)

Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from St. Louis to Helsinki that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices and deals for you by selecting your travel dates.
Choose your dates
2:38 pm - 2:00 pmSTL-HEL
15h 22m2 stops
12:25 pm - 10:36 pmHEL-STL
17h 11m1 stop
$829American Airlines
Find Deal
Wed, Oct 16 - Mon, Oct 28
10:10 am - 12:00 pmSTL-HEL
17h 50m2 stops
2:00 pm - 10:27 amHEL-STL
27h 27m3 stops
$876Air Canada
Find Deal
Wed, Oct 16 - Mon, Oct 28
4:20 pm - 10:45 amSTL-HEL
34h 25m1 stop
12:25 pm - 10:36 pmHEL-STL
17h 11m1 stop
$1,083American Airlines
Find Deal
Wed, Oct 16 - Mon, Oct 28
12:50 pm - 11:50 pmSTL-HEL
27h 00m2 stops
7:30 pm - 3:41 pmHEL-STL
28h 11m2 stops
$3,013Lufthansa
Find Deal
Wed, May 29 - Wed, Jun 5
12:53 pm - 4:40 pmSTL-HEL
19h 47m2 stops
6:40 am - 9:52 pmHEL-STL
23h 12m2 stops
$3,122Delta
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Tue, May 28 - Tue, Jun 4
3:00 pm - 9:00 pmSTL-HEL
22h 00m2 stops
3:55 pm - 10:02 pmHEL-STL
14h 07m1 stop
$3,358British Airways
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Wed, May 29 - Wed, Jun 5
11:09 am - 10:45 amSTL-HEL
15h 36m1 stop
7:30 pm - 7:28 pmHEL-STL
31h 58m2 stops
$3,734Finnair
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Tue, May 28 - Mon, Jun 3
5:08 pm - 2:15 pmSTL-HEL
13h 07m1 stop
3:55 pm - 10:02 pmHEL-STL
14h 07m1 stop
$3,980Finnair
Find Deal
Wed, May 29 - Wed, Jun 5
1:10 pm - 12:00 pmSTL-HEL
14h 50m2 stops
6:20 pm - 1:30 pmHEL-STL
27h 10m1 stop
$4,066Lufthansa
Find Deal
Wed, May 29 - Tue, Jun 4
3:00 pm - 6:25 pmSTL-HEL
19h 25m2 stops
4:00 pm - 10:02 pmHEL-STL
14h 02m1 stop
$4,734British Airways
Find Deal
Sat, Jun 1 - Sat, Jun 8

Flights from St. Louis to Helsinki - Travel Insights & Trends

Get data-powered insights and trends into flights from St. Louis to Helsinki to help you find the cheapest flights, the best time to fly and much more.

What’s the cheapest day of the week to fly from St. Louis to Helsinki?

The average price of all flights from St. Louis to Helsinki clicked on KAYAK for each day over the last 12 months.
Your flight ticket price will generally be cheaper if you fly to Helsinki on a Saturday and more expensive on a Wednesday. On your return trip to St. Louis, you should consider flying back on a Tuesday, and avoid Mondays for better deals.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights from St. Louis to Helsinki, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.
The cheapest month for flights from St. Louis to Helsinki is October, where tickets cost $528 on average. On the other hand, the most expensive months are June and May, where the average cost of tickets is $1,416 and $1,398 respectively.

Good to know

Low season

January

High season

October

Cheapest flight

$829
Best time to beat the crowds with an average 17% drop in price.
Most popular time to fly and prices are also 47% lower on average.
Flight from St. Louis to Helsinki

When to book flights from St. Louis to Helsinki

Are your dates flexible? Find out the best times to travel from St. Louis to Helsinki based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from St. Louis to Helsinki

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

    In the last 3 days, the lowest price for a flight from St. Louis to Helsinki was $829 for a round-trip ticket.

  • Do I need a passport to fly between St. Louis and Helsinki?

    Yes, you’ll need a passport to travel to Helsinki from St. Louis.

  • Which aircraft models fly most regularly from St. Louis to Helsinki?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from St. Louis to Helsinki?

    oneworld, Star Alliance, and SkyTeam are the airline alliances operating flights between St. Louis and Helsinki, with oneworld being the most commonly used for this route.

  • Which is the best airline for flights from St. Louis to Helsinki, Delta or Finnair?

    The two airlines most popular with KAYAK users for flights from St. Louis to Helsinki are Delta and Finnair. With an average price for the route of $1,229 and an overall rating of 8.0, Delta is the most popular choice. Finnair is also a great choice for the route, with an average price of $1,066 and an overall rating of 7.7.

  • How does KAYAK find such low prices on flights from St. Louis to Helsinki?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from St. Louis to Helsinki.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from St. Louis to Helsinki?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Helsinki from St. Louis is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from St. Louis to Helsinki?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Helsinki with an airline and back to St. Louis with another airline. Booking your flights between St. Louis and HEL can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from St. Louis to Helsinki?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Helsinki from St. Louis up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

Top 5 airlines serving from St. Louis to Helsinki

 
See real verified KAYAK customer reviews for airlines flying from St. Louis to Helsinki. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from St. Louis to Helsinki? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.0
DeltaOverall score based on 10896 reviews
8.0Entertainment
7.9Comfort
8.6Crew
8.2Boarding
7.4Food
Airline reviews

Big plane, long flight, absolutely no leg room and basically non existent air! I am 5”4’ and always travel Main Cabin, I was miserable on this plane and could barely move when we arrived in Cabo due to the cramped leg area!

8.0 ExcellentCynthia, Apr 2024ATL - SJD
Read more about Delta reviews

Big plane, long flight, absolutely no leg room and basically non existent air! I am 5”4’ and always travel Main Cabin, I was miserable on this plane and could barely move when we arrived in Cabo due to the cramped leg area!

From Atlanta to Cabo I would have hoped on a plane that size I would have been able to breathe and wiggle my feet a little! The leg room in that plane is non existent and I am only 5”4’. And the air vent either wasn’t working very well or just could not blow air from the ceiling to the seat area as I was suffocating through the entire flight! And please don’t say I would have been more comfortable in first class because I cannot afford those rates and have always travelled Main Cabin without issues !

The pilots were good. Disappointing when planes don't have electrical ports

I liked the piloting of the aircraft. Very disappointed about lack of electrical ports. Also, although a short flight. there was enough time to hand out snacks to comfort + seats as was done for first class.

I had a wonderful experience flying with delta. The gentleman taking care of us on our flight was so nice, accommodating, and attentive. He always was smiling and giving pins to the kids which made me smile. The flight was quick too and without turbulence. Thank you for the great flying experience.

Delta is one of the best airlines I have flown

Made the Atlanta to Pittsburgh trip many times, with Delta no issues

I always fly with Delta. My friends tell me their horror stories of flying with other airlines. I just smile and say, “You should fly Delta”

I'm a larger, athletic guy (6'2", 260lbs powerlifter) and I found the seats incredibly uncomfortable with minimal leg room, especially in a window seat. Now, I full understand that being smaller may change my view but even if I was 80lbs less, my legs would be the same size and I was sandwiched between my seat and the seat in front of me.

Horrible. This was not first class. This was a connecting flight whi h was late. My original flight never came. I hated the fact that delta gave me a connecting flight from New York to Orlando Florida. No meals and the television screens were not working. There wasn't even any power to charge your phones. This is NOT FIRST CLASS DELTA!!! Do better next time!

Booked connecting flights with KlM. My serving flight was the furthest part of the airport. On arrival in Zurich. My two cases arrived but only one carry on belong to my son. His three suitcase didn't arrive. After enquiring we discovered they were still in Amsterdam. We landed at 11.12. We eventually left the airport just after one.

I thought KLM was the best airline but the Lima - Amsterdam was 1 hours late, the Brussels - Amsterdam was 2.30 hours late and the Amsterdam - Lima was 30 minutes late

Overall a good experience. We were disappointed when we had to check our carry on due to the plane being full. KLM hadn’t notified us and we had valuable items in the carry on but they still made us check it. Some of the food was great and some was mediocre. Crew is really kind and funny.

It was nice to be on a legacy airline, people try at least.

Mostly fine. Minor delays departing and arriving. Quite a cramped plane, not so much as regards legroom but very narrow seats. Quiet nice food. Non-working USB charger. Flight attendants were helpful but not particularly proactive — one had to work to get their attention (but all was fine once they notice you), very Dutch style:)

The plane was clean and the staff was friendly. Food and drinks as expected on international flights. The entertainment system was old style, with a pullout controller, and selections not as extensive as on other flights.

The food quality is poor. The staff are very friendly and accommodating. The entertainment program was limited. I experienced a delay of 30 minutes due to two issues. Passenger luggage had to be removed and there was a technical issue with the stairs not detaching from the aircraft. The pilot managed to compensate and we arrived only 15 minutes later. The luggage at Dubai airport was very slow. I waited over an hour.

The boarding was one of the worst I’ve ever experienced. The fault lays on Ohare Airport and not so much the airline. The waiting area by the gate was the size to accommodate a regional flight for 20-30 people and right next to a busy walkway. When you cramped nearly 300 passengers into that space is was unbearable.

The Crew have no idea about the food they're serving the passengers. The Crew MUST be instructed before each flight about the menu that will be served to the passengers, whether the food is vegetarian or non-vegetarian, whether it is Halal, Kosher or not.

Pros: "Crew was great, on time flight, clean plane."
Cons: "Entertainments options were shockingly few. Honestly have not been on a plane recently with so few and limited options of TV series and movies. I was extremely surprised. Wish I had know and I would’ve had more options for my family."

LATE LATE LATE!!! Plagued by late AA flights on this trip. Such a drag. This one was by far the worst.

WiFi connected but only let you go to the AA website, not even text messaging worked.

Too bad that first class seats do not recline significantly causing discomfort

I think the seats on some of their planes are uncomfortable. You can be ok on a short flight of two hours but no more than that. The delays, and also the refreshments on the plane were not enough.

Flight delayed over an over all day until it cancelled at 1:30am. Would not repeatedly delay that late. Offer hotel rooms and rebook early. Very difficult for families with small children

Not sure why JAL partnered with American Airlines because their service is no where near similar. Flight attendants were not friendly and didn’t smile. Food was horrible…

this is starting to seem like an american airlines standard. delayed flights and fake apologies… getting tired of it

Terrible boarding , Business class seats are sub standard. As usual crew will miss your food too

Just get Economy Plus for international flights, so worth it the extra room, bigger seats…

This flight is frequently delayed. The connections seemingly are more frequently delayed. I’ve missed connections as a result twice on the same route to charlotte then Charleston. Final destination arrival has been the next day, twice in a row. No pilots, no crew. Too many excuses. Unfortunately, my days with American are over.

Seats were not the most comfortable and food options weren’t great but overall but everything else was excellent

Check-in very easy and smooth. Plane and crew were nice. Seat open next to me created more space. Food was fair but plentiful. Lots of movies and I was able to sleep some on the way to Munich. Very tight connection, about an hour. Fast through passport control and a bit of a walk to last G terminal gate but I made my connection to Palma. Unfortunately, my luggage did not make it. It is now almost 24 hours since I anded and still NO luggage. I know it landed last night on another flight. Local delivery should be today to my hotel in Palma but nothing yet. I asked about the tight connection when I checked in and was assured they would get my luggage to the connecting flight. Very disappointing it missed my flight but more disappointing that it has taken so long to arrive. Failure on the airlines and service to get my luggage to date.

I wish the flight attendant was a little bit kinder

The food wasn’t great and it would be nice if the airlines showed documentaries about the countries we are flying into.

Disappointed everytime. The app doesn't load the boarding passes. They have lots of agent that seem to be busy doing nothing with a long line waiting to get paper boarding passes. Food choices are poor. Entertainment is less than entertaining.

Horrible experience. Nothing to give to kids to keep them entertained.

I think I have bruises on my kneecaps. Do the seats have to be so close together these days? And if they are so close they really shouldn’t recline. I think when the gentleman in front of me reclined, the back of his head was on my chin. That being said the crew were always caring and polite, and the flight was on time and very safe. So I’m grateful for that.

I always try to book flights that don’t charge for baggage. Yet I was charged $75 for this flight.

Trouble keeps changing the time and I was booked different flight without knowing it was bad experience

I dropped my wallet under my seat on this flight with all of my money and credit card. I requested to be able to go back and retrieve it but Lufthansa denied my request. I went to the Customer Services and they called Lost and Found but I was told nothing found would be turned in until around 12:00pm. My next flight was leaving so I was unable to check to see if my wallet was turned in. I will never fly with Lufthansa again.

Full flight. Seat 8 F. I don't usually have the business class seat at the last row. Feel awkward for the stewardess crossing over the person sitting on aisle. Nothing to complain, especially, the airline stewardess really tried to accommodate such situation. It is just an awkward seat.

Not connecting flights. Missed my flight from Dublin to Liverpool because I arrived at Dublin one hour too late. For this mistake, they offered me a flight from Dublin to Manchester. Thats great and all, but I waste time and money to commute to Liverpool. Be sure to check the time of your connecting flights, because they sure don’t when they sell it to you

Excellent! Great flight attendants, good food (in business class, at least), very comfortable. Touchscreen and remote wasn’t great.

In economy and food was ok, but with limited leg space (and I was in a 2 seat configuration) it was difficult to eat with a tiny seat tray. I spilt wine on my trousers. First time on British Air (I usually fly Turkish Air) and in a 777. Heathrow was pleasant but changing terminals awkward.

Starting with the flight Cairo to London the plain was so poor no entertainment at all uncomfortable seats although it’s 5 hours long,then an American airline plain took me from London to Miami it was a bad experience the crew most of flight time not available and they asked us to help our selves for any snacks if we need. From Miami to London actually was perfect flight with a huge plain and perfect crew but from London to Cairo was horrible plain with stiff fixed seats not movable no entertainment or wi fi very poor Menu which is unacceptable for a business class

I've done hundreds of flights in my life, and this flight was one of the best I've ever taken, From beginning to end, everything went smoothly, professionally, and with a smile and friendly attitude from all employees I interacted with. The food was delicious (and free), as were the drinks. There was just a genial and effective way in the way that British Airways organized the flight -that reminded of days in the 70's, 80's, and 90's, when flying was a fun, and exciting adventure. I enjoyed and had confidence in the abilities of the flight crew, I'll be flying British Airways several more times this summer. Thank you so much for the great experience! Cheryl Olso

My baggage did not arrived with me. Took 3 days to get it after so may calls and follow up

Terrible! I missed my flight to my final destination and British airlines and American Airlines keep pointing fingers on each other’s. Nobody wants to take responsibility

Terrible. Flight was 3 hours delayed and I missed my other flight to my final destination

Overall, terrific service, accommodations, and experience. Only reason comfort was rated lower was because it was difficult to keep a comfortable sleeping position for the overnight flight, but I also had an economy seat.

St. Louis - Helsinki Flights

Departure:

St. Louis (STL)United States

Destination:

Helsinki (HEL)Finland

Cabin classes:

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