STL - HEL

$971 Find Cheap Flights from St. Louis to Helsinki

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 5/19. 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.
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KAYAK searches 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, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from St. Louis to Helsinki, as well as popular online travel agencies
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Flights Deals

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.

Recent round-trip flight deals from St. Louis to Helsinki

KAYAK's recommended round-trip deals from the most popular airlines that fly from St. Louis to Helsinki.
Discover the best prices for you by selecting your travel dates on KAYAK.
Delta Logo
3:50 pm - 5:40 pmSTL-HEL
17h 50m2 stops
Delta Logo
7:15 am - 8:48 pmHEL-STL
21h 33m2 stops
$971Delta
Find Deal
Mon, May 19 - Tue, May 27
Delta Logo
3:50 pm - 5:40 pmSTL-HEL
17h 50m2 stops
Delta Logo
6:35 am - 8:48 pmHEL-STL
22h 13m2 stops
$983Delta
Find Deal
Mon, May 19 - Fri, May 30
Air Canada Logo
7:30 am - 6:55 pmSTL-HEL
27h 25m2 stops
Air Canada Logo
6:10 am - 7:58 pmHEL-STL
21h 48m2 stops
$1,016Air Canada
Find Deal
Wed, May 21 - Thu, May 29
Air Canada Logo
7:30 am - 4:40 pmSTL-HEL
25h 10m2 stops
Air Canada Logo
6:10 am - 7:43 pmHEL-STL
21h 33m2 stops
$1,026Air Canada
Find Deal
Wed, May 21 - Fri, May 30
British Airways Logo
7:30 pm - 9:00 pmSTL-HEL
17h 30m2 stops
British Airways Logo
8:00 am - 8:58 pmHEL-STL
20h 58m2 stops
$1,080British Airways
Find Deal
Thu, May 22 - Fri, May 30
American Airlines Logo
1:38 pm - 2:15 pmSTL-HEL
16h 37m1 stop
American Airlines Logo
12:35 pm - 6:21 pmHEL-STL
13h 46m1 stop
$1,150American Airlines
Find Deal
Thu, May 22 - Fri, May 30
American Airlines Logo
4:15 pm - 2:15 pmSTL-HEL
14h 00m1 stop
American Airlines Logo
4:25 pm - 10:15 pmHEL-STL
13h 50m1 stop
$1,250American Airlines
Find Deal
Mon, May 19 - Sun, Jun 1
Finnair Logo
4:15 pm - 2:15 pmSTL-HEL
14h 00m1 stop
Finnair Logo
4:25 pm - 9:52 pmHEL-STL
13h 27m1 stop
$1,450Finnair
Find Deal
Wed, May 21 - Thu, May 29
Finnair Logo
10:36 am - 10:45 amSTL-HEL
16h 09m1 stop
Finnair Logo
4:25 pm - 9:52 pmHEL-STL
13h 27m1 stop
$1,458Finnair
Find Deal
Fri, May 23 - Fri, May 30
British Airways Logo
4:52 pm - 5:50 pmSTL-HEL
16h 58m2 stops
British Airways Logo
8:00 am - 7:08 pmHEL-STL
19h 08m2 stops
$5,234British Airways
Find Deal
Wed, Jul 16 - Sat, Jul 26
Useful Info

KAYAK's insights & trends for St. Louis to Helsinki flights

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 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 round-trip 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 November, where tickets cost $507 (return) on average. On the other hand, the most expensive months are June and July, where the average cost of round-trip tickets is $1,539 and $1,473 respectively.

Good to know

Low seasonJanuary
High seasonJuly
Cheapest flight$971
Best time to beat the crowds but there is an average 13% increase in price.
Most popular time to fly with an average 47% increase in price.
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 $971 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?

    SkyTeam, Star Alliance, and oneworld 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, Finnair or American Airlines?

    The two airlines most popular with KAYAK users for flights from St. Louis to Helsinki are Finnair and American Airlines. With an average price for the route of $1,016 and an overall rating of 7.6, Finnair is the most popular choice. American Airlines is also a great choice for the route, with an average price of $668 and an overall rating of 7.2.

  • 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.

Top 4 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.
7.6
FinnairOverall score based on 1275 reviews
6.7Food
6.9Entertainment
8.1Crew
7.4Comfort
7.6Boarding
Airline reviews

Boarding uncomfortable. Stewardess said I would have to check my carry on as there was no room in the overhead bins. Another passenger helped me find a spot.

8.0 ExcellentAnonymous, Jan 2025DFW - CVG
Read more Finnair reviews

Boarding uncomfortable. Stewardess said I would have to check my carry on as there was no room in the overhead bins. Another passenger helped me find a spot.

Any flight that lands safely is a good flight. However our leg from Helsinki was delayed 1 hour with no explanation. The delay would not allow us to make our connection to Cincinnati. I was informed by American Airlines that our Cincinnati flight was rescheduled for the following day. I immediately made a non refundable hotel reservation in Dallas. Upon exiting the plane at Dallas I was given a hotel voucher. Nice, but I can't get a refund on the hotel I booked. A little communication would have been helpful. Food on Finnair is below quality of Korean Air.

The cabin crew really looked like they wanted to be somewhere else. They weren't really interested in providing an attentive service to full fare paying passengers at all. However the Captiain's in flight announcements were relaxed and very entertaining.

Crew were professional and responsive. Food was mediocre and breakfast could do with revampinmg

Food was very ordinary for premium economy, very small portions.

i dont know WHY they call it business class. the seats are NOT significantly wider than economy seats, they just do not let the middle seats be beepked to give the illusion of more space between passengers. the seats do NOT recline any more than economy seats either. the only real difference is the full meal served to business (vs none for economy). I would rather have a wider, lie flat ACTUAL business class seat with no food for a 3 hr flight. this was pretty disappointing to say the least.

There wore nice leather like sits, in my opinion seats lay out bit tight . Crew was great they did averything possible to make averywone comfortable as possible, food was, think worst I ever head on flight, head chicken and yellow rice. Ice cream was a nic treat.

Our previous flight was delayed but they waited for us to board.

Flight was delayed, short time connection to next flight but we make it, service was good, worth to fly just to try thair on board blueberry juce. Eccelent communication with airline.

My American Airlines flight was deleted and you guys never let me know

Everything is good except the dinner and breakfast. The sandwich is very delicious. Toilet is clean, I only use one of them. Flight attendants are very nice. 👍👍

A bit rush for transit. Food and entertainment are not available

Boarding was a little difficult. The gate area at O'Hare was very small and crowded due to multiple gates in the area. Could not hear the intercom, so had to rely on signage to see when my group was boarding and the signage was blocked by passengers standing in the gate. Flight was great and we arrived in Montreal on time.

Multiple delays and not straight answer from the United team

For economy, it was very good. Staff was great, they even let some of us change seats for more leg room... Put an empty seat between us which was fantastic for a 12hr flight. Onboard entertainment was excellent, I think over 200 choices of movies/tv/etc The bad was the barely/nonfunctional wifi that cost either $16.99 or 1700 miles (full flight). It was atrocious... Definitely the worst of the last 3 long haul major airlines I was on the last few months.

Stewardess spilled orange juice on my clothes/seat no help no apology just threw napkins at me to clean the mess up. Not Happy.

Smooth flight. Boarding was chaotic. Could not hear the gate agent over the intercom. People were lined up in the wrong lines. Groups one and two were told to board through line one and group 3 through line 2. All very confusing. Once in the air, the flight was smooth. There was no entertainment option on this aircraft, even though it was a larger aircraft.

The plane pushed back from the gate on time. However, it stopped on the ramp, and we waited for over 20 minutes before the aircraft pulled back to the gate. Apparently, something of importance had to be removed from the aircraft by the gate agent. I found this to be odd. The delay was not significant, but I felt that whatever was on the aircraft that had to be taken off, should’ve been done before we pushed back from the gate.

I didn’t get on plane. Passport being processed by consulate with visa application. Tried to cancel through underpricer after purchasing cacelling for any reason. No dice, they are thieves.

Electric plugs didn't work. Entertainment system wasn't working

Several delays. Next flight was worse. Did not arrive home until 2am PT

Very helpful ground crew after an earlier flight delay and being rebooked on a different flight.

Everything about the flight was lovely…We left early, arrived early, cabin crew were efficient and helpful. Flight was easy and most pleasant.

First world problems, but still… We were seated in first class and asked for a cocktail on a very short, 50 minute flight. After our drink order was taken, a half hour went by, and we noticed that every other person in the small plane had been served except for us. We got up to ask about it, the drinks finally came, then were taken away three minutes later since the flight was so short. Really strange situation, on the other hand, we were in Utah.

We missed our flight. The boarding pass had the wrong gate and by the time we received the text from Kayak, our flight was already gone. I’ll never use Kayak again and will go direct to the airlines in the future.

Boarding took forever, the plane was cramped and cold, and the seatbelt song came on constantly throughout the red eye flight with a loud pre-recorded message playing each time

Cabin felt crammed Snacks are lame But crew was super efficient getting us out on time despite delay

Took off on time and successfully avoided weather that looked to be a problem along the way

There were five broken seats on the plane. The crew was very rude in telling people they had to get off the plane and get a flight the next day. No call for volunteers, but telling people they had to get off. One woman was flying with her elderly mother and daughter and was told she had to leave or all three had to leave. Fortunately, a volunteer offered to stay. The situation was handled poorly.

The flight to Tokyo AA61 took off about two hours late, but then had to turn back. By that time the crew had to be replaced. Then they kept promising to take off in an hour, then in 3, then switch to the next day.

Too much long line at the TSA and Security. Prepare for long walk for baggage claim.

The flight from Seattle was delayed, which made me miss my connection to Florence. I was re-booked NINE HOURS LATER!!! That’s basically a vacation day lost. British Airways needs to partner with other airlines when possible to get a more realistic travel time, if delays occur. I realize there aren’t many flights to Florence from London, so I would book differently were I to return. The actual flight from Seattle was very comfortable and the crew was great, no faults there. I enjoy British Airways, this was an anomaly.

The crew could not have been more helpful, my meal was excellent, I slept peacefully until right before landing, and the BA lounge was a godsend. The only negative I encountered was the coffee both on the plane and in the lounge. Not to my taste but that’s a personal preference.

I don’t understand why a reputable airline like BA would delegate their London flights to AA. Makes no sense to me, as most domestic carriers do such a poor job these days. Terminal 3 at LHR is a total dump

The boarding process was quite loud and chaotic. The flight attendants kept barking over the PA system about people needing to only stow large items in the overhead bins. During the one and only service, I was hit by the service cart. At the same time, a passenger was returning from the bathroom and the crew definitely saw him but stopped a few seats short of allowing him to sit down before starting service and made him wait a good 10 minutes before passing his seat and allowing him to sit down, after which he had to ask for his snack and beverage or he would have been passed over. Neither flight attendant thanked passengers as they left; in fact, I did not see them again once the plane door was opened.

Cancelled flight minutes before boarding. Rescheduled flight was two days later

The flight attendants were EXTREMELY personable and appreciated the service, lights going off after dinner (probably the norm, but I haven’t flown evening overnight flights in a while). Thank you!

Business class seats were very dated on my plane. Very little storage, charging ports were not easily accessible, tv screen kept flopping away. Vegetarian food was disappointing: hardly any protein and severely under-seasoned. Crew was lovely.

The food was ok, but not great. They delayed boarding in Portland and did not enforce group boarding. But the crew was excellent, went above and beyond.

The food was pathetic. There wasn't much leg room and recline space for such a long flight. No tea/ coffee for a 2-3 hour connecting flight without purchasing! Really!?

Everything you need to know for your flight from St. Louis to Helsinki

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