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$119+ Cheap flights from Helena to Seattle (HLN - SEA)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/26. Fares are subject to change and may not be available on all flights or dates of travel.
HLN — SEA
Jul 26 — Aug 21
Sun 7/26
Sun 8/2
1 adult, Economy
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Cheap flight deals from Helena to Seattle

Cheapest flights from Helena to Seattle
Explore the most affordable flight options available from Helena to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 26, 2026.

This Alaska Airlines deal was found by Cheapflights users on 6/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/74:48 pm
HLN
-
SEA
Nonstop1h 53m
Alaska Airlines
Tue 10/131:36 pm
SEA
-
HLN
Nonstop1h 35m
Alaska Airlines
Deal found 6/25$177
This Alaska Airlines deal was found by Cheapflights users on 6/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/74:48 pm
HLN
-
SEA
Nonstop1h 53m
Alaska Airlines
Sun 10/111:36 pm
SEA
-
HLN
Nonstop1h 35m
Alaska Airlines
Deal found 6/25$187
This Booking.com deal was found by Cheapflights users on 6/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/274:48 pm
HLN
-
SEA
Nonstop1h 53m
Alaska Airlines
Wed 11/181:28 pm
SEA
-
HLN
Nonstop1h 36m
Alaska Airlines
Deal found 6/25$191
This Alaska Airlines deal was found by Cheapflights users on 6/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/84:48 pm
HLN
-
SEA
Nonstop1h 53m
Alaska Airlines
Sun 10/111:36 pm
SEA
-
HLN
Nonstop1h 35m
Alaska Airlines
Deal found 6/25$197
This Delta deal was found by Cheapflights users on 6/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/712:50 pm
HLN
-
SEA
1 stop5h 03m
Delta
Tue 10/135:45 am
SEA
-
HLN
1 stop5h 39m
Delta
Deal found 6/25$207
This Delta deal was found by Cheapflights users on 6/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/912:50 pm
HLN
-
SEA
1 stop6h 40m
Delta
Tue 10/135:45 am
SEA
-
HLN
1 stop5h 39m
Delta
Deal found 6/25$222
This Delta deal was found by Cheapflights users on 6/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/912:50 pm
HLN
-
SEA
1 stop6h 40m
Delta
Mon 10/125:45 am
SEA
-
HLN
1 stop5h 39m
Delta
Deal found 6/25$237
This Delta deal was found by Cheapflights users on 6/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/1012:50 pm
HLN
-
SEA
1 stop5h 03m
Delta
Wed 10/145:45 am
SEA
-
HLN
1 stop5h 39m
Delta
Deal found 6/25$242
This Alaska Airlines deal was found by Cheapflights users on 6/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/114:48 pm
HLN
-
SEA
Nonstop1h 53m
Alaska Airlines
Tue 10/131:36 pm
SEA
-
HLN
Nonstop1h 35m
Alaska Airlines
Deal found 6/25$247
This deal was found by Cheapflights users on 6/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/85:18 pm
HLN
-
SEA
Nonstop1h 56m
Alaska Airlines
Sat 9/122:05 pm
SEA
-
HLN
Nonstop1h 36m
Alaska Airlines
Deal found 6/24$252
This Delta deal was found by Cheapflights users on 6/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/1012:50 pm
HLN
-
SEA
1 stop5h 03m
Delta
Sun 10/115:45 am
SEA
-
HLN
1 stop5h 39m
Delta
Deal found 6/25$257
This Booking.com deal was found by Cheapflights users on 6/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/155:18 pm
HLN
-
SEA
Nonstop1h 56m
Alaska Airlines
Sun 9/202:05 pm
SEA
-
HLN
Nonstop1h 36m
Alaska Airlines
Deal found 6/24$258

Find flight deals from Helena to Seattle

Discover tips and strategies to find the most affordable flight options for your journey from Helena (HLN) to Seattle (SEA). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated June 26, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$177
(Alaska Airlines)

One-way from

$119
(Priceline)

Popular in

July

Cheapest in

February

Average price

$438

Good round-trip deal

$377 or less

Good one-way deal

$218 or less
Provider with most accurate pricing for Helena-Seattle/Tacoma Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Helena-Seattle/Tacoma Intl flights.
Search Deals
From Helena to Seattle/Tacoma Intl
Search Deals
One-way flight from Helena to Seattle/Tacoma Intl
Search Deals
Highest demand for flights based on searches. 32% potential increase in price ($124 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 7% potential price decrease ($18 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 2026
Search Deals
Price to beat on a round-trip flight from Helena to Seattle/Tacoma Intl.
Search Deals
Price to beat on a one-way flight from Helena to Seattle/Tacoma Intl.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Helena to Seattle that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated June 26, 2026.
Use the filters below to find and compare flights from Helena to Seattle that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

HelenaSeattle

HLN - SEA

HLNSEA

Helena

Fri 10/16

12:50 pm-6:30 pm

1 stop6h 40m

Seattle/Tacoma Intl

Tue 10/20

5:45 am-12:24 pm

1 stop5h 39m

$222

HelenaSeattle

HLN - SEA

HLNSEA

Helena

Fri 10/9

12:50 pm-6:30 pm

1 stop6h 40m

Seattle/Tacoma Intl

Sat 10/10

5:45 am-12:24 pm

1 stop5h 39m

$222

HelenaSeattle

HLN - SEA

HLNSEA

Helena

Wed 9/2

12:55 pm-4:54 pm

1 stop4h 59m

Seattle/Tacoma Intl

Sun 9/6

5:45 am-12:15 pm

1 stop5h 30m

$222

HelenaSeattle

HLN - SEA

HLNSEA

Helena

Fri 10/9

12:50 pm-6:30 pm

1 stop6h 40m

Seattle/Tacoma Intl

Mon 10/12

5:45 am-12:24 pm

1 stop5h 39m

$237
Quickest round-trip

HelenaSeattle

HLN - SEA

HLNSEA

Helena

Tue 11/3

4:41 pm-5:33 pm

Nonstop1h 52m

Seattle/Tacoma Intl

Wed 11/4

1:28 pm-4:04 pm

Nonstop1h 36m

$247

HelenaSeattle

HLN - SEA

HLNSEA

Helena

Sat 9/12

5:18 pm-6:14 pm

Nonstop1h 56m

Seattle/Tacoma Intl

Tue 9/15

2:05 pm-4:41 pm

Nonstop1h 36m

$252

HelenaSeattle

HLN - SEA

HLNSEA

Helena

Thu 10/1

5:18 pm-6:14 pm

Nonstop1h 56m

Seattle/Tacoma Intl

Sat 10/3

1:36 pm-4:11 pm

Nonstop1h 35m

$252

HelenaSeattle

HLN - SEA

HLNSEA

Helena

Sun 9/6

5:40 am-8:57 am

1 stop4h 17m

Seattle/Tacoma Intl

Sun 9/13

5:45 am-12:17 pm

1 stop5h 32m

$278

HelenaSeattle

HLN - SEA

HLNSEA

Helena

Fri 10/9

4:48 pm-5:41 pm

Nonstop1h 53m

Seattle/Tacoma Intl

Mon 10/12

1:36 pm-4:11 pm

Nonstop1h 35m

$298

HelenaSeattle

HLN - SEA

HLNSEA

Helena

Thu 10/8

5:45 am-9:33 am

1 stop4h 48m

Seattle/Tacoma Intl

Sun 10/11

5:45 am-12:24 pm

1 stop5h 39m

$328

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/25

Showing 1-10 of 22 resultsSorted by cheapest first
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Compare providers for flights from Helena to Seattle

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Helena to Seattle in June.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Helena-Seattle flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Helena-Seattle flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Helena-Seattle flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Helena-Seattle flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Helena-Seattle flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Helena to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from Helena with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

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

What is the cheapest month to book a flight from Helena to Seattle?

Currently, February is the cheapest month in which you can book a flight from Helena to Seattle (average of $147). Flying from Helena to Seattle in July is currently the most expensive (average of $442). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from HLN to SEA?

Find hourly flight availability from Helena to Seattle. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated June 26, 2026.

A simple way to save on the total cost of your ticket is to fly from Helena to Seattle in the afternoon. If you’re flexible enough to do this you can expect to save up to 58% on your trip compared to booking a flight at noon.

Reviews of airlines servicing Seattle

Get insights into the airlines that provide service to Seattle. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Seattle. Reviews last updated June 26, 2026.
Peruse reviews from past customers who have flown with Alaska Airlines from Helena to Seattle to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
7.9
Good
12,581 reviews

Overall

7.9

Crew

8.5

Boarding

8.1

Entertainment

7.0

Comfort

7.8

Food

7.0

Reviews

1 / 20
8.0
Excellent

Anonymous,Jun 2026

RDU - SEA

There was almost a 2 hour delay after arriving before our next flight. Also my husband needed a wheelchair and it seemed hard to get help.
Alaska Airlines
7.9
Good
12,581 reviews
Alaska Airlines
7.9
Good
12,581 reviews

Overall

7.9

Crew

8.5

Boarding

8.1

Entertainment

7.0

Comfort

7.8

Food

7.0

Reviews

1 / 20
8.0
Excellent

Anonymous,Jun 2026

RDU - SEA

There was almost a 2 hour delay after arriving before our next flight. Also my husband needed a wheelchair and it seemed hard to get help.

Related info for your journey

Find useful and relevant information for your journey from Helena to Seattle. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airports do I use to fly from Helena to Seattle?

    If you wish to fly to Seattle from Helena, then you need to book flights from Helena to Seattle/Tacoma Intl. There is 1 flight from Helena (HLN) to Seattle/Tacoma Intl (SEA) per day to choose from. Flights to Seattle from Helena are available from 1 airline, which means you should have some options if you want to compare airfare deals. 1h 52m is how long a nonstop flight from Helena to Seattle/Tacoma Intl typically takes.

  • How popular is this Helena to Seattle flight route?

    Within the past month, 2 users have taken a look at flights from Helena to Seattle/Tacoma Intl.

  • How long is the flight from Helena to Seattle?

    For as low as $247, Delta can have you in Seattle from Helena in 1h 52m. The distance from Helena to Seattle is about 489 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What is the cheapest airline to fly from Helena to Seattle round-trip?

    Flying on Alaska Airlines is currently your cheapest option to Seattle, with prices starting at $137. Users have found that Alaska Airlines is 46% cheaper than the other options available to this destination.

  • What are the most reliable airlines from Helena to Seattle?

    Before booking your flight to Seattle from Helena, check out the most reliable airlines to get you to your destination on time: Hawaiian Airlines (100%), Korean Air (80%), Alaska Airlines( 61%).

  • What are the cheapest flights from Helena to Seattle?

    On average you can expect to pay $362 for a flight from Helena to Seattle. The cheapest flight overall is $183 while the most popular route, (Helena - Seattle/Tacoma Intl) is currently priced at $191.

  • Can I find deals for flights from Helena to Seattle that include hotel bookings?

    Yes. In addition to deals on Helena to Seattle flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Helena to Seattle?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Helena to Seattle.

  • Can I find deals for business class flights from Helena to Seattle?

    Yes. Cheapflights offers flight deals from Helena to Seattle by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Helena to Seattle?

    Currently, February is the cheapest month in which you can book a flight from Helena to Seattle (average of $147). Flying from Helena to Seattle in July is currently the most expensive (average of $442). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
SeaTac
Tacoma
Lacey
Leavenworth
Olympia
Ocean Shores
Renton
Edmonds
Snoqualmie
Tumwater
Tukwila
Kent
Lynnwood
Ellensburg
Fife
Marysville
Lakewood
Issaquah
Shoreline
Centralia

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top airline flying from Helena to Seattle

Discover the top airline that operate flights from Helena to Seattle. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated June 26, 2026.
AirlineCheapestAverageFlexibilityOn-time
Alaska AirlinesCheapest$137Average$207FlexibilityNo cancel feeOn-time75%

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