HLN - SEA

$124 Find Cheap Flights from Helena to Seattle - Compare and Save

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
Travelers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

Save 21% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Bundle and saveSave money when you bundle your flight + hotel.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Everything you should know

Cheapest round-trip
$187
Typical prices: $127-$528
Alaska Airlines
Sat 11/7Sat 11/14
HLN - SEA • Non-stop
Cheapest one-way
$124
Typical prices: $154-$308
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 • 41% 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

Sat, Nov 7 - Sat, Nov 14
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
Wed, Sep 30 - Sat, Oct 3
Alaska Airlines Logo
5:18 pm - 6:14 pm
HLN
-
SEA
1h 56mnonstop
Alaska Airlines Logo
1:36 pm - 4:11 pm
SEA
-
HLN
1h 35mnonstop
$192Alaska Airlines
Sat, Sep 19 - Sat, Sep 26
Alaska Airlines Logo
5:18 pm - 6:14 pm
HLN
-
SEA
1h 56mnonstop
Alaska Airlines Logo
2:05 pm - 4:41 pm
SEA
-
HLN
1h 36mnonstop
$197Alaska Airlines
Sat, Nov 7 - Sat, Nov 14
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
Wed, Oct 14 - Wed, Oct 21
Delta Logo
12:50 pm - 4:53 pm
HLN
-
SEA
5h 03m
1 stop
Delta Logo
5:45 am - 12:24 pm
SEA
-
HLN
5h 39m
1 stop
$222Delta
Wed, Aug 26 - Sun, Aug 30
Delta Logo
5:40 am - 8:57 am
HLN
-
SEA
4h 17m
1 stop
Delta Logo
5:45 am - 12:15 pm
SEA
-
HLN
5h 30m
1 stop
$232Delta
Fri, Oct 9 - Mon, Oct 12
Delta Logo
12:50 pm - 4:53 pm
HLN
-
SEA
5h 03m
1 stop
Delta Logo
5:45 am - 12:24 pm
SEA
-
HLN
5h 39m
1 stop
$237Delta
Wed, Aug 26 - Sun, Aug 30
Alaska Airlines Logo
5:11 pm - 6:08 pm
HLN
-
SEA
1h 57mnonstop
Alaska Airlines Logo
1:58 pm - 4:34 pm
SEA
-
HLN
1h 36mnonstop
$247Alaska Airlines
Wed, Sep 30 - Sat, Oct 3
Alaska Airlines Logo
5:18 pm - 6:14 pm
HLN
-
SEA
1h 56mnonstop
Alaska Airlines Logo
1:36 pm - 4:11 pm
SEA
-
HLN
1h 35mnonstop
$252Alaska Airlines
Fri, Oct 23 - Sat, Oct 24
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
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 $438 and $392 respectively.

Good to know

Low seasonJuly
Cheapest flight$124
Best time to beat the crowds but there is an average 56% increase in price.
Most popular time to fly with an average 13% 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.

  • 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 $218 or less one-way and $388 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 airline 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 12541 reviews
7.8Comfort
7.0Entertainment
7.1Food
8.5Crew
8.1Boarding
Airline reviews

there was no entertainment available and only water/coffee/juice/soda

8.0 ExcellentAnonymous, Jun 2026
PHX - SEA
Read more Alaska Airlines reviews

there was no entertainment available and only water/coffee/juice/soda

Subject: Formal Complaint – Incompetent Service and Denied Boarding on Flight 1409 (CLSVJM – Dear Alaska Airlines Customer Relations, I am writing to file a formal complaint regarding my experience on Flight 1409 departing from Seattle on 6/13/26. As a physician and business owner who frequently coordinates group travel, this was one of the worst airline experiences I have encountered. Upon arrival, I was informed that my check-in boarding pass was not official, despite successfully obtaining it electronically through your website/app with no warnings or indications of issues. My electronic boarding pass was rejected, leading to cancellation/denial of boarding. The gate agent (an older woman) was unhelpful, claimed my name had been announced multiple times (which it had not—she did not even know my name correctly), and mistakenly boarded my traveling companion under my name. Additionally, an older blonde staff member nearly failed to return my passport, highlighting a clear lack of training on your check-in and boarding systems. This chaos forced me onto a later flight while my group waited in Canada, unable to check into our Airbnb or pick up rental cars (as I was the primary booker). The entire incident caused significant business disruption, stress, and additional expenses. I have flown Alaska Airlines previously but will not consider it again without resolution. I request: • Full reimbursement of any additional costs incurred. • Appropriate compensation (vouchers/miles) for the inconvenience and poor service. • Confirmation of corrective actions for Please respond within 7-10 business days. Sincerely, Dr. Chunwen Teng

Never had so many staff members be rude and disrespectful. I had a staff member sarcastically call me “girly” after making me wait 20 minutes to be seen by her. I was able to print my luggage tag and she told me I was too late to check luggage I said the system obviously disagrees. And you had me wait way too long while you asked every single passenger ahead of me about their Disney vacations. She wasted so much time to then say “girly your bag won’t make it on the plane” I’m not her girly I’m a full grown adult. She needs to learn a hell of a lot of respect

The agents were super helpful. I was traveling with my mother inlaw who needed whell chair assisstance. The help and accomodation from the checkin crew, to the boarding crew and inflight crew was excellent.

Completely full flight. Boarding was smooth, but people didn’t listen about use of overhead bins which is typical. We pre-purchased a snack which was tasty. Drinks were good and plentiful. Flight left late because previous flight was delayed.

Eva Airlines attendants were wonderful. I really enjoyed the hot meals. They always greeted me with a warm smile. I'm looking forward to flying back to the USA with them again!

Flight maintenance was on so that flight didn’t go able to fly out to Seattle and Inhad to get another flight,,

3 of the 4 legs of our trip the crews were awesome! 1 leg the trip attendants were rude & dismissive, didn't even greet us when boarding even though both myself & my husband said hello directly to them when we boarded.

Well organized boarding. Cabin crew were efficient and professional. Thoroughly enjoyed the flight.

The first flight was fine, great crew, but the plane was delayed 45 minutes to go to Seattle because of they were missing a ramp. That would make sense if the plane was actually at the gate. Not if we’re still waiting for a plane. After we landed we waited 30-45 minutes on the tarmac just to get off the plane. Alaska made me miss my connecting flight, wasting my time, and my money. I should honestly be reimbursed, but hey, when does the airline ever actually take accountability? Never.

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

Information on your arrival and departure airports