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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 1/8. Fares are subject to change and may not be available on all flights or dates of travel.
HLN — SEA
Jan 11 — Jan 181
Sun 1/11
Sun 1/18
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 December 12, 2025.

This Alaska Airlines deal was found by Cheapflights users on 12/11. 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 12/316:32 pmHLN - SEA
Nonstop1h 55mAlaska Airlines
Sat 1/33:17 pmSEA - HLN
Nonstop1h 38mAlaska Airlines
Deal found 12/11$328
This Alaska Airlines deal was found by Cheapflights users on 12/10. 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.
Mon 12/226:32 pmHLN - SEA
Nonstop1h 55mAlaska Airlines
Wed 12/313:17 pmSEA - HLN
Nonstop1h 38mAlaska Airlines
Deal found 12/10$393
This Alaska Airlines deal was found by Cheapflights users on 12/11. 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.
Sat 12/276:32 pmHLN - SEA
Nonstop1h 55mAlaska Airlines
Wed 12/313:17 pmSEA - HLN
Nonstop1h 38mAlaska Airlines
Deal found 12/11$463
This Delta deal was found by Cheapflights users on 12/10. 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.
Thu 12/255:30 amHLN - SEA
1 stop5h 38mDelta
Mon 12/295:25 amSEA - HLN
1 stop6h 05mDelta
Deal found 12/10$508
This Delta deal was found by Cheapflights users on 12/10. 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.
Mon 12/221:11 pmHLN - SEA
1 stop6h 20mDelta
Sat 12/275:25 amSEA - HLN
1 stop6h 05mDelta
Deal found 12/10$533
This Alaska Airlines deal was found by Cheapflights users on 12/10. 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 12/246:32 pmHLN - SEA
Nonstop1h 55mAlaska Airlines
Sun 12/283:17 pmSEA - HLN
Nonstop1h 38mAlaska Airlines
Deal found 12/10$543
This Alaska Airlines deal was found by Cheapflights users on 12/10. 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 12/256:32 pmHLN - SEA
Nonstop1h 55mAlaska Airlines
Mon 12/293:17 pmSEA - HLN
Nonstop1h 38mAlaska Airlines
Deal found 12/10$558
This Delta deal was found by Cheapflights users on 12/10. 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.
Mon 12/225:30 amHLN - SEA
1 stop5h 38mDelta
Wed 12/314:57 pmSEA - HLN
1 stop4h 33mDelta
Deal found 12/10$603
This United Airlines deal was found by Cheapflights users on 12/10. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/306:10 amHLN - SEA
1 stop28h 46mUnited Airlines
Tue 1/69:25 amSEA - HLN
2 stops27h 16mUnited Airlines
Deal found 12/10$620
This United Airlines deal was found by Cheapflights users on 12/11. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/312:26 pmHLN - SEA
3 stops23h 01mUnited Airlines
Sat 1/31:55 pmSEA - HLN
1 stop6h 36mUnited Airlines
Deal found 12/11$624
This Delta deal was found by Cheapflights users on 12/10. 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.
Tue 12/235:30 amHLN - SEA
1 stop5h 38mDelta
Sat 12/275:25 amSEA - HLN
1 stop6h 05mDelta
Deal found 12/10$629

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 December 12, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$177
(Alaska Airlines)

One-way from

$119
(Alaska Airlines)

Popular in

May

Cheapest in

November

Average price

$285

Good round-trip deal

$285 or less

Good one-way deal

$284 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. 14% potential increase in price ($46 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($9 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
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 December 12, 2025.
Use the filters below to find and compare flights from Helena to Seattle that are best for you.

Fly from

Helena

Fly to

Seattle

Route

Depart

Return

Price

HelenaSeattle

HLN - SEA

HLNSEA

Helena

Wed 2/25

4:36 pm-5:26 pm

Nonstop1h 50m

Seattle/Tacoma Intl

Sat 2/28

1:21 pm-3:59 pm

Nonstop1h 38m

$177

HelenaSeattle

HLN - SEA

HLNSEA

Helena

Sat 2/14

4:36 pm-5:26 pm

Nonstop1h 50m

Seattle/Tacoma Intl

Wed 2/18

1:21 pm-3:59 pm

Nonstop1h 38m

$177

HelenaSeattle

HLN - SEA

HLNSEA

Helena

Wed 2/25

1:05 pm-4:48 pm

1 stop4h 43m

Seattle/Tacoma Intl

Sat 2/28

5:30 am-12:25 pm

1 stop5h 55m

$187

HelenaSeattle

HLN - SEA

HLNSEA

Helena

Fri 2/27

4:36 pm-5:26 pm

Nonstop1h 50m

Seattle/Tacoma Intl

Sat 2/28

1:21 pm-3:59 pm

Nonstop1h 38m

$187

HelenaSeattle

HLN - SEA

HLNSEA

Helena

Wed 2/25

4:36 pm-5:26 pm

Nonstop1h 50m

Seattle/Tacoma Intl

Sun 3/1

1:21 pm-3:59 pm

Nonstop1h 38m

$187

HelenaSeattle

HLN - SEA

HLNSEA

Helena

Thu 2/26

1:05 pm-4:48 pm

1 stop4h 43m

Seattle/Tacoma Intl

Sat 2/28

5:30 am-12:25 pm

1 stop5h 55m

$197

HelenaSeattle

HLN - SEA

HLNSEA

Helena

Wed 2/25

1:05 pm-4:48 pm

1 stop4h 43m

Seattle/Tacoma Intl

Mon 3/2

5:30 am-12:25 pm

1 stop5h 55m

$197

HelenaSeattle

HLN - SEA

HLNSEA

Helena

Fri 2/27

1:05 pm-4:48 pm

1 stop4h 43m

Seattle/Tacoma Intl

Sat 2/28

5:30 am-12:25 pm

1 stop5h 55m

$197

HelenaSeattle

HLN - SEA

HLNSEA

Helena

Thu 2/26

4:36 pm-5:26 pm

Nonstop1h 50m

Seattle/Tacoma Intl

Sun 3/1

1:21 pm-3:59 pm

Nonstop1h 38m

$197

HelenaSeattle

HLN - SEA

HLNSEA

Helena

Fri 2/27

4:36 pm-5:26 pm

Nonstop1h 50m

Seattle/Tacoma Intl

Mon 3/2

1:21 pm-3:59 pm

Nonstop1h 38m

$197

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/10

Showing 1-10 of 21 results
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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 December.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice 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 eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Helena-Seattle flight deals on Cheapflights vs. eDreams >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 eDreams the most. eDreams 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, November is the cheapest month in which you can book a flight from Helena to Seattle (average of $87). Flying from Helena to Seattle in March is currently the most expensive (average of $177). 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 December 12, 2025.

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 45% 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 December 12, 2025.
Peruse reviews from past customers who have flown with Alaska Airlines and Hawaiian 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
8.0
Very good
11,429 reviews

Food

7.1

Boarding

8.1

Comfort

7.8

Overall

8.0

Entertainment

7.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Dec 2025

SJC - SEA

The flight was great. Don’t have to make it better. Everything was OK.
Alaska Airlines
8.0
Very good
11,429 reviews
Alaska Airlines
8.0
Very good
11,429 reviews

Food

7.1

Boarding

8.1

Comfort

7.8

Overall

8.0

Entertainment

7.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Dec 2025

SJC - SEA

The flight was great. Don’t have to make it better. Everything was OK.
Hawaiian Airlines
7.8
Good
2,818 reviews
Alaska Airlines
8.0
Very good
11,429 reviews

Food

7.1

Boarding

8.1

Comfort

7.8

Overall

8.0

Entertainment

7.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Dec 2025

SJC - SEA

The flight was great. Don’t have to make it better. Everything was OK.

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 are 2 flights from Helena (HLN) to Seattle/Tacoma Intl (SEA) per day to choose from. Flights to Seattle from Helena are available from 2 different airlines, which means you should have some options if you want to compare airfare deals. 1h 41m 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, 3 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 $177, Alaska Airlines can have you in Seattle from Helena in 1h 50m. The distance from Helena to Seattle is about 489 mi. Generally, flights for this route are nonstop.

  • What are the cheapest airlines flying from Helena to Seattle round-trip?

    Flying on Hawaiian Airlines is currently your cheapest option to Seattle, with prices starting at $119. Another option worth looking into is Alaska Airlines, starting at $146 round trip. Users have found that Hawaiian Airlines is 56% 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: Horizon Air (92%), Hawaiian Airlines (87%), Korean Air( 84%).

  • What are the cheapest flights from Helena to Seattle?

    On average you can expect to pay $408 for a flight from Helena to Seattle. The cheapest flight overall is $157 while the most popular route, (Helena - Seattle/Tacoma Intl) is currently priced at $187.

  • 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, November is the cheapest month in which you can book a flight from Helena to Seattle (average of $87). Flying from Helena to Seattle in March is currently the most expensive (average of $177). 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
Tacoma
SeaTac
Lakewood
Olympia
Ocean Shores
Edmonds
Lynnwood
Renton
Puyallup
Kirkland
Tukwila
Kent
Cle Elum
Marysville
Leavenworth
Fife
Aberdeen
Shoreline
Centralia
Federal Way

Browse thousands of different options on Cheapflights for your next trip

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Top 2 airlines flying from Helena to Seattle

Discover the top 2 airlines 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 December 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
Alaska AirlinesCheapest$146Average$287FlexibilityNo cancel feeOn-time75%
Hawaiian AirlinesCheapest$149Average$268FlexibilityNo cancel feeOn-time85%

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