HLN - SEA

$124 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 8/19. 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.
1 adult
1 adult, Economy, 0 bags

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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Everything you should know

Cheapest round-trip
$187
Typical prices: $372-$142
Alaska Airlines
Wed 11/4Sat 11/7
HLN - SEA • Non-stop
Cheapest one-way
$124
Typical prices: $133-$238
Alaska Airlines
Wed 8/19
HLN - SEA • Non-stop
Top airlines
Cheapest • from $187 (round-trip)
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
You can fly direct with Alaska Airlines. Average duration is 1h 52m
Direct flights
Direct flights
+1
+1
Direct flights
Direct flights
+1
When to travel
Cheapest • 38% price drop
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Seattle!
Flight Deals
Booking Insights
Flight 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

Wed, Nov 4 - Sat, Nov 7
Alaska Airlines Logo
4:41 pm - 5:33 pm
HLN
-
SEA
1h 52mnonstop
Alaska Airlines Logo
1:28 pm - 4:04 pm
SEA
-
HLN
1h 36mnonstop
$187Alaska Airlines
Sat, Aug 29 - Mon, Nov 2
Alaska Airlines Logo
5:11 pm - 6:08 pm
HLN
-
SEA
1h 57mnonstop
Alaska Airlines Logo
1:28 pm - 4:04 pm
SEA
-
HLN
1h 36mnonstop
$197Alaska Airlines
Sat, Oct 17 - Wed, Oct 28
Delta Logo
12:50 pm - 6:30 pm
HLN
-
SEA
6h 40m
1 stop
Delta Logo
5:45 am - 12:24 pm
SEA
-
HLN
5h 39m
1 stop
$217Delta
Sat, Oct 17 - Fri, Oct 23
Delta Logo
5:45 am - 9:33 am
HLN
-
SEA
4h 48m
1 stop
Delta Logo
5:45 am - 12:24 pm
SEA
-
HLN
5h 39m
1 stop
$227Delta
Fri, Oct 16 - Mon, Oct 19
Delta Logo
12:50 pm - 6:30 pm
HLN
-
SEA
6h 40m
1 stop
Delta Logo
5:45 am - 12:24 pm
SEA
-
HLN
5h 39m
1 stop
$237Delta
Sat, Oct 17 - Sun, Oct 25
Alaska Airlines Logo
4:48 pm - 5:41 pm
HLN
-
SEA
1h 53mnonstop
Alaska Airlines Logo
1:36 pm - 4:11 pm
SEA
-
HLN
1h 35mnonstop
$247Alaska Airlines
Fri, Oct 16 - Sun, Oct 25
Alaska Airlines Logo
4:48 pm - 5:41 pm
HLN
-
SEA
1h 53mnonstop
Alaska Airlines Logo
1:36 pm - 4:11 pm
SEA
-
HLN
1h 35mnonstop
$257Alaska Airlines
Fri, Sep 4 - Sat, Oct 31
Alaska Airlines Logo
5:11 pm - 6:08 pm
HLN
-
SEA
1h 57mnonstop
Alaska Airlines Logo
1:36 pm - 4:11 pm
SEA
-
HLN
1h 35mnonstop
$262Alaska Airlines
Fri, Oct 9 - Mon, Oct 12
Delta Logo
12:50 pm - 6:30 pm
HLN
-
SEA
6h 40m
1 stop
Delta Logo
5:45 am - 12:24 pm
SEA
-
HLN
5h 39m
1 stop
$263Delta
Fri, Sep 4 - Sun, Nov 1
Alaska Airlines Logo
5:11 pm - 6:08 pm
HLN
-
SEA
1h 57mnonstop
Alaska Airlines Logo
1:28 pm - 4:04 pm
SEA
-
HLN
1h 36mnonstop
$272Alaska Airlines
Booking Insights

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?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Helena to Seattle departing in November.

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, Wednesday is the cheapest day to fly on average and Sunday is the most expensive. Flying from Seattle back to Helena, the best deals are generally found on Tuesday, with Thursday 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 February, where tickets cost $147 (return) on average. On the other hand, the most expensive months are June and July, where the average cost of round-trip tickets is $387 and $298 respectively.

Good to know

Low seasonNovember
Cheapest flight$124
Best time to beat the crowds with an average 34% drop in price.
Most popular time to fly with an average 20% increase in price.
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 5 days, the lowest price for a flight from Helena to Seattle was $124 for a one-way ticket and $187 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?

    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 is the only airline alliance operating flights between Helena and Seattle.

  • 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 Hawaiian Airlines?

    The two airlines most popular with KAYAK users for flights from Helena to Seattle are Alaska Airlines and Hawaiian Airlines. With an average price for the route of $209 and an overall rating of 7.9, Alaska Airlines is the most popular choice. Hawaiian Airlines is also a great choice for the route, with an average price of $227 and an overall rating of 7.8.

  • 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 $373 or less one-way and $377 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

Alaska Airlines

Tuesday

Alaska Airlines

Alaska Airlines

Wednesday

Alaska Airlines

Alaska Airlines

Thursday

Alaska Airlines

Alaska Airlines

Friday

Alaska Airlines

Alaska Airlines

Saturday

Alaska Airlines

Alaska Airlines

Sunday

Alaska Airlines

Alaska Airlines

See more direct flights

Direct returns

Seattle/Tacoma Intl to Helena

Monday

Alaska Airlines

Alaska Airlines

Tuesday

Alaska Airlines

Alaska Airlines

Wednesday

Alaska Airlines

Alaska Airlines

Thursday

Alaska Airlines

Alaska Airlines

Friday

Alaska Airlines

Alaska Airlines

Saturday

Alaska Airlines

Alaska Airlines

Sunday

Alaska Airlines

Alaska Airlines

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.
7.9
Alaska AirlinesOverall score based on 12480 reviews
7.0Entertainment
8.1Boarding
7.1Food
8.5Crew
7.8Comfort
Airline reviews

For a 5hrs flight a simple meal should provided instead of snacks only

6.0 GoodIvonny, Jun 2026
RDU - SEA
Read more Alaska Airlines reviews

For a 5hrs flight a simple meal should provided instead of snacks only

Missoula is a great airport. Desk and gate crews were very helpful and friendly

Other than delaying take off by an hour, the flight was smooth. Crew were kind and supportive, and made sure we were always considered as a priority.

Flight was on time. My pre-ordered meal came as expected.

Flight was delayed and we were left in the plane with planed turned off, took so long to get to destination and luggages were lost. Such a hectic travel

The flight was delayed out of BIL so many times that I was not able to make my connection. I was rebooked for the next day, losing a full day of my trip. I still have not been compensated as promised.

Flight was delayed, but not be a lot. Crew at the departure gate was friendly. Flight was filled with turbulence, enough to concern my husband. Snacks were delivered to rows in front of us but attendant stopped handing out snacks when she got to our row. Team was efficient but lackadaisical. Usually on board crews are more animated and friendly. No onboard entertainment and no seatback video screens for a six hour flight. Landing was a bit rough. We were told the wrong turnstile for luggage.

2 hour delay. Then some luggage was unloaded at 1baggage claim #7 then without notice the baggage claim was changed to #12. No one informed the passengers they were changing baggage claim turnstile. Several of us waited for 90 minutes after the 1st turnstile stopped and changed to other flights luggage.

Many gate changes in Seattle and mechanical problems on plane which resulted in a new gate change. Both flights, from Seattle to Detroit and Seattle to Eugene resulted in a lot of walking and tram taking.

No negatives. Crew was great, flight was on time and there were no crazy passengers. 🤩

Flight delayed two hours , missed connection flight then connection cancelled- horrible experience with hotel

Omg the disaster at the security was on another level! “Go to this end, sorry closed now, go to that end”. Ridiculous! This took over an hour! As far as the airline was concerned although I booked nearly a year ago I couldn’t get my bag tag - stand in another 15 minute line or my seat on Hawaiian Airlines- 5 more minutes! Then my TSA status was denied. Like what the heck! Makes a person not want to travel with this amount of incompetence

The Honolulu Hub needs 2 to 3 times the amount of things to do as well as shuttles that transport to/from gates and terminals. Arriving from OCONUS locations; transferring to CONUS locations its a miserable experience. Fetching and re-checking bags, then returning to a gate across the airport take longer than any other large airport. If youre confused by what I mean, the process goes like this: Disembark plane Walk a mile to the main terminal Walk half a mile to baggage claim Wait 40 minutes for baggage Walk a mile to re-check-in baggage Wait 20 minutes for checking in those bags Fo back through the wrong TSA line because the signage is poor Almost miss the connecting flight because your gate is across the airport.

The checking was disaster, the crew wasn't behave well. It took us two hours to check in, after that thr line at the TSA was long, we barely make the flight. Bad airline

Fabulous if you have a portable wheelchair. They can store it in the galley and you can just walk out with it. Really nice and the flat seats are just incredible, very nice. iPads for movies, also pretty nice,

The crew were exceptionally nice and accommodating. My wife was tired after the flight from Haneda, Tokyo. They let her sleep and served her dinner later after she woke up, before we landed in PDX.

No charging outlets worked. Other than collecting trash attendants didn’t come around. No one could hear flight attendants announcements during the flight. Seat pads were horrible. Sitting on a board for 5 hours. What happened to Hawaiian airlines comfort, hospitality, and extras? Our pilots did an excellent job trying to minimize turbulence and incredible job in landing in windy conditions.

I like that if they asked you to checked in a bag at the gate they give you priority to board

Horrible food and crew. Crew were laughing and talking loud while people were trying to sleep

Yall need to integrate your system with Alaska more efficiently. They booted me off the first flight because of a discrepancy on your end.

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

Information on your arrival and departure airports