HLN - SEA

$89 Find Cheap Flights from Helena to Seattle

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Helena to Seattle departing on 9/16. 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
1 adult, Economy

KAYAK searches hundreds of travel sites at once for deals on flights to Seattle

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Helena to Seattle, 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 Helena to Seattle, as well as popular online travel agencies
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Flights Deals

Cheap Flights from Helena to Seattle (HLN-SEA)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Helena to Seattle 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 for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Helena to Seattle

Sat, Aug 16 - Sat, Aug 30
Alaska Airlines Logo
4:08 pm - 4:55 pmHLN-SEA
1h 47mnonstop
Alaska Airlines Logo
12:46 pm - 3:21 pmSEA-HLN
1h 35mnonstop
$177Alaska Airlines
Find Deal
Sat, Aug 16 - Mon, Aug 25
Hawaiian Airlines Logo
4:08 pm - 4:55 pmHLN-SEA
1h 47mnonstop
Hawaiian Airlines Logo
12:46 pm - 3:21 pmSEA-HLN
1h 35mnonstop
$197Hawaiian Airlines
Find Deal
Fri, Sep 26 - Mon, Sep 29
Alaska Airlines Logo
4:02 pm - 4:50 pmHLN-SEA
1h 48mnonstop
Alaska Airlines Logo
12:46 pm - 3:21 pmSEA-HLN
1h 35mnonstop
$217Alaska Airlines
Find Deal
Fri, Aug 15 - Mon, Aug 25
Hawaiian Airlines Logo
4:08 pm - 4:55 pmHLN-SEA
1h 47mnonstop
Hawaiian Airlines Logo
12:46 pm - 3:21 pmSEA-HLN
1h 35mnonstop
$228Hawaiian Airlines
Find Deal
Fri, Aug 15 - Mon, Aug 25
Delta Logo
1:00 pm - 6:25 pmHLN-SEA
6h 25m1 stop
Delta Logo
7:10 am - 12:20 pmSEA-HLN
4h 10m1 stop
$237Delta
Find Deal
Fri, Aug 15 - Tue, Aug 26
Delta Logo
1:00 pm - 6:25 pmHLN-SEA
6h 25m1 stop
Delta Logo
5:30 am - 12:20 pmSEA-HLN
5h 50m1 stop
$267Delta
Find Deal
Fri, Sep 26 - Mon, Sep 29
United Airlines Logo
5:18 pm - 11:29 pmHLN-SEA
7h 11m1 stop
United Airlines Logo
7:04 pm - 9:00 pmSEA-HLN
24h 56m1 stop
$377United Airlines
Find Deal
Fri, Sep 26 - Mon, Sep 29
United Airlines Logo
5:18 pm - 11:29 pmHLN-SEA
7h 11m1 stop
United Airlines Logo
7:04 pm - 4:40 pmSEA-HLN
20h 36m1 stop
$399United Airlines
Find Deal
Fri, Aug 15 - Tue, Aug 26
 Logo
5:39 pm - 8:01 amHLN-SEA
15h 22m1 stop
 Logo
12:46 pm - 3:21 pmSEA-HLN
1h 35mnonstop
Thu, Sep 11 - Sun, Sep 14
 Logo
5:20 pm - 11:28 pmHLN-SEA
7h 08m1 stop
 Logo
12:46 pm - 3:21 pmSEA-HLN
1h 35mnonstop
Useful Info

KAYAK's insights & trends for Helena to Seattle flights

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

How much is a round-trip flight from Helena to Seattle?

What’s the cheapest day of the week to fly from Helena to Seattle?

The average price of all round-trip flights from Helena to Seattle clicked on KAYAK for each day over the last 12 months.

For Helena to Seattle, Thursday is the cheapest day to fly on average and Friday is the most expensive. Flying from Seattle back to Helena, the best deals are generally found on Friday, with Wednesday being the most expensive.

What is the cheapest month to fly from Helena to Seattle?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Helena to Seattle, 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 Helena to Seattle is January, where tickets cost $197 (return) on average. On the other hand, the most expensive months are November and March, where the average cost of round-trip tickets is $488 and $343 respectively.

How far in advance should I book a flight from Helena to Seattle?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Helena to Seattle, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Helena to Seattle, you should book around 3 weeks before departure. For the absolute cheapest price, our data suggests you should book 15 weeks before departure.

Good to know

Low seasonJanuary
High seasonAugust
Cheapest flight$89
Best time to beat the crowds with an average 34% drop in price.
Most popular time to fly and prices are also 20% lower on average.
Flight from Helena to Seattle

When to book flights from Helena to Seattle

Are your dates flexible? Find out the best times to travel from Helena to Seattle 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 Helena to Seattle

  • What is the cheapest flight from Helena to Seattle?

    In the last 3 days, the lowest price for a flight from Helena to Seattle was $89 for a one-way ticket and $177 for a round-trip.

  • Do I need a passport to fly between Helena and Seattle?

    No, a passport isn't needed to fly from Helena to Seattle. However, local authorities might ask for an official ID.

  • Which airports will I be using when flying from Helena to Seattle?

    Helena and Seattle are both served by 1 main airport. You will leave Helena from Helena and will be arriving at Seattle/Tacoma Intl.

  • Which airlines offer Wi-Fi service onboard planes from Helena to Seattle?

    American Airlines, Alaska Airlines, and JetBlue offer inflight Wi-Fi service on the Helena to Seattle flight route.

  • Which aircraft models fly most regularly from Helena to Seattle?

    The Embraer 175 is the aircraft model that flies most regularly on the Helena to Seattle flight route.

  • Which airline alliances offer flights from Helena to Seattle?

    oneworld, and SkyTeam are the airline alliances operating flights between Helena and Seattle, with SkyTeam being the most commonly used for this route.

  • On which days can I fly direct from Helena to Seattle?

    There are nonstop flights from Helena to Seattle on a daily basis.

  • Which is the best airline for flights from Helena to Seattle, Alaska Airlines or Delta?

    The two airlines most popular with KAYAK users for flights from Helena to Seattle are Alaska Airlines and Delta. With an average price for the route of $271 and an overall rating of 8.0, Alaska Airlines is the most popular choice. Delta is also a great choice for the route, with an average price of $551 and an overall rating of 8.0.

  • How does KAYAK find such low prices on flights from Helena to Seattle?

    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 Helena to Seattle.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Helena to Seattle?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Seattle from Helena 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 Helena to Seattle?

    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 Seattle with an airline and back to Helena with another airline. Booking your flights between Helena and SEA 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 Helena to Seattle?

    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 Seattle from Helena up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from Helena to Seattle

  • Looking for a cheap flight? 25% of our users found flights on this route for $163 or less one-way and $268 or less round-trip.

Prefer to fly direct from Helena to Seattle?

 
Direct data is based off flight results for the next 60 days. Find direct flights from all airlines flying direct from Helena to Seattle/Tacoma Intl.
Find which airlines fly direct from Helena Airport to Seattle/Tacoma Intl Airport, which days they fly and book direct flights.

Direct departures

Helena to Seattle/Tacoma Intl

Monday

Alaska Airlines, Hawaiian Airlines, Korean Air

Alaska Airlines, Hawaiian Airlines, +1 more

Tuesday

Alaska Airlines, Hawaiian Airlines, Korean Air

Alaska Airlines, Hawaiian Airlines, +1 more

Wednesday

Alaska Airlines, Hawaiian Airlines, Korean Air

Alaska Airlines, Hawaiian Airlines, +1 more

Thursday

Alaska Airlines, Hawaiian Airlines, Korean Air

Alaska Airlines, Hawaiian Airlines, +1 more

Friday

Alaska Airlines, Hawaiian Airlines, Korean Air

Alaska Airlines, Hawaiian Airlines, +1 more

Saturday

Alaska Airlines, Hawaiian Airlines, Korean Air

Alaska Airlines, Hawaiian Airlines, +1 more

Sunday

Alaska Airlines, Hawaiian Airlines, Korean Air

Alaska Airlines, Hawaiian Airlines, +1 more

See more direct flights

Direct returns

Seattle/Tacoma Intl to Helena

Monday

Alaska Airlines, Hawaiian Airlines, Korean Air

Alaska Airlines, Hawaiian Airlines, +1 more

Tuesday

Alaska Airlines, Hawaiian Airlines, Korean Air

Alaska Airlines, Hawaiian Airlines, +1 more

Wednesday

Alaska Airlines, Hawaiian Airlines, Korean Air

Alaska Airlines, Hawaiian Airlines, +1 more

Thursday

Alaska Airlines, Hawaiian Airlines, Korean Air

Alaska Airlines, Hawaiian Airlines, +1 more

Friday

Alaska Airlines, Hawaiian Airlines, Korean Air

Alaska Airlines, Hawaiian Airlines, +1 more

Saturday

Alaska Airlines, Hawaiian Airlines, Korean Air

Alaska Airlines, Hawaiian Airlines, +1 more

Sunday

Alaska Airlines, Hawaiian Airlines, Korean Air

Alaska Airlines, Hawaiian Airlines, +1 more

See more direct flights

Reviews of the top airlines flying from Helena to Seattle

 
See real verified KAYAK customer reviews for airlines flying from Helena to Seattle. 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 Helena to Seattle? 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
Alaska AirlinesOverall score based on 10000 reviews
8.1Boarding
7.1Food
7.8Comfort
8.5Crew
7.1Entertainment
Airline reviews

Paying for first class and then they want $8:00 for wifi.

4.0 OkayGreg, Jul 2025SFO - SEA
Read more Alaska Airlines reviews

Paying for first class and then they want $8:00 for wifi.

10 hour delay. Fuel spill. Crew had to drive to Indianapolis to a get a plane. The longest day of travel ever. Poor service.Little to no communication.

Easy flight, crew was polite & observant of all passenger needs as well as safety.

fine. only problem,,,, for some,,,,was that many people started trying to exit from the back of the plane,, . lots of irate people. there should be a flight attendant mid plane..to be sure that doesn't happen. The crew up front had no idea what was happening. One big guy started it..then a bunch of others followed his lead. could have gotten ugly... One man stepped in and questioned those rule breakers.. nothing bad happened,,,but......

We were delayed. We spent more time waiting on the plane than actually flying (it’s only a 37 minute flight). Other than that, it was fine.

Only offered water, no snacks provided, and it was cold on the plane, everyone was wearing sweatshirt or jacket in June. I asked for blanket, but crew said they didnt have anything and would turn the heat up, that didn't happen, so for 6 hours I remained cold.

Flight from New Orleans to Seattle to Anchorage was delayed for 3 hours My flight from Seattle to Anchorage was not rescheduled. I had to call the airlines to tell them to get a flight from Seattle to Anchorage they finally got me a flight If I hadn’t been aware of this problem I don’t know how long I would of waited in Seattle to get a flight to Anchorage!!!!!! Return trip from Anchorage to New Orleans in Seattle to New Orleans I was at the right gate when I realized something was wrong they had changed the gate without notifying the change l finally made it on time with minutes to spare & exhausted

I was at risk of not getting on the flight, as when I presented my boarding pass at the gate, it showed me as not having checked in. I was sent to the desk as the last of the other passengers boarded. The agent there said he could see that I had done all of my part and allowed times recommended, but it showed me as not checked in and he couldn't figure out how to correct it. He actually asked them to hold the flight as he struggled with it. He called for support, someone corrected it, and he printed boarding passes for both flights to reduce further issues. I did get on, and needed to ask someone to exit my seat.

Eddie, our flight attendant in the back was excellent. He was very kind and concerned for our happiness and comfort before and during our flight. He made the experience great. We had to deplane due to a ground delay and he made sure we had snacks and water to keep us comfortable while we waited. Overall, it was a great experience!

I liked the food. The WiFi was out and the flight was late.

Very late arrival at PWM. Late jet getting to ATL. Equipment problem with aircraft - could not get enough water onto plane., Another delay getting FAA approval for flight with bottled H2O. Not the crew’s problem.

Everything was fine except the entertainment was not working for half of the flight.

Easy boarding with an extremely kind attendant. Seats were spacious and we had 3 seats for 2 people so we could stretch out. Comfortable air flow and very attentive and hospital attendants. Bathrooms and food were the only negative. Bathrooms were so small you could hardly get in and close the door. I don’t think an obese person would fit or a person with a movement disability. Food was the trending food for flights, nonexistent. We spent $40 getting sandwich and snack at airport for our 6 hour flught.

At first, we were on the runway for about an hour, literally. The Captain did explain that the Control Tower just had a change shift (sounds like an unrealistic excuse) and then that we had to change a runway. A regular economy seat is made for 12 yo twiggy. I understand Delta wants to push for an upgrade, but after sitting in a Comfort seat and in First class. I would say First class is not worthy of my money. The landing was delayed because of the weather in NYC, I don't hold that against Delta, of course. The Captain did alert us to that upon takeoff in Vegas and again as we reached NY.

No one fussed at me about my pap machine as a 3rd pice on the plane. Boarding was pleasant and smooth. The boarding agent in Anchorage was a fun character- he could be in a movie. :~) The on-board crew were downright pleasant. No militant attitudes on Delta. Like all planes these days the seats are too narrow for standard Americans and at 5’2” there is barely enough leg room. I don’t know how tall people fold themselves into the seats. But that’s nothing specific to Delta

My husband upgraded our seats and I don't know if it was due to the type of planet was or if they didn't upgrade our seats. We were supposed to be in I believe comfort seats and they were just as tight as any other seat- no leg room and we are very tall people but at least it wasn't extremely cold. My husband did put in a complaint about our seating because he paid extra and if we would have known that the space and the tightness would have been the same, we just would have gotten the emergency row emergency row seats that we normally get. We love Delta but both our flights coming home we're not good. Oh I forgot to mention that on our flight to Hawaii our luggage wheels got broke and we had to purse new luggage on vacation then we never had this problem so we didn't know protocol and reported it after we got home only for them to tell is we only had 24hrs to report the damage. Not sure what was going on with Delta this vacation trip.

My flight was extremely cold. I had a jacket and a cover was left in each seat. The cover was extremely thin and I have a disability, fibromyalgia and arthrithis and AC air is the worst. I closed my vent and my husbands vent and it still was frigid. I asked the attendant if I could get another cover and she quickly almost dismissively and totally unconcerned stating, (I quote) (one per chair) and walked off so quickly that I didn't get a chance to explain to her that I literally have adisability. I didnt want to make a seen so I set on that flight for over 5 hours in pain, joints locking up and extremely uncomfortable. When my fibromyalgia flares up my joints not only ache but they will lock up also and it takes me days to get back to my regular self even though I take medication for it. I felt like it would not have hurt anyone at all for her to just give me an extra cover because I'm sure they have all types of medical issues in people that fly every day.

After all the weather issues at least they got me to my destination the next day

My flight was canceled after being rescheduled for four days canceling my trip. Kayak and everyone affiliated with it I.e the airlines, and just fly have been excruciating to deal with. My trip to visit family had to be canceled as there was no way to make it. I am furious at all of you.

They delayed our flight because of bad weather in NY which was completely understandable. Then they cancelled our flight and a later flight that evening. The earliest we could fly was the next morning. We ended up buying last minute tickets on another airline and made it home slightly delayed but safely that evening. Delta kept saying it was weather related but if that was the case how did we make it back on another airline? The weather in NY was cloudy but not bad.

Everything you need to know for your flight from Helena to Seattle

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