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$109+ 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 9/16. Fares are subject to change and may not be available on all flights or dates of travel.
HLN — SEA
Aug 18 — Aug 251
Mon 8/18
Mon 8/25
1 adult, Economy
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Cheap 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 August 13, 2025.

Round-trip from

$177
(Hawaiian Airlines)

One-way from

$109
(Hawaiian Airlines)

Popular in

November

Cheapest in

January

Average price

$253

Good round-trip deal

$272 or less

Good one-way deal

$104 or less
From Helena to Seattle/Tacoma Intl
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One-way flight from Helena to Seattle/Tacoma Intl
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Highest demand for flights based on searches. 14% potential increase in price ($50 potential increase over avg. RT price).
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Cheapest flight prices on average. 6% potential price decrease ($18 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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Price to beat on a round-trip flight from Helena to Seattle/Tacoma Intl.
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Price to beat on a one-way flight from Helena to Seattle/Tacoma Intl.
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Find 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 August 13, 2025.

This Hawaiian Airlines deal was found by Cheapflights users on 8/12. 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/244:02 pmHLN - SEA
Nonstop1h 48mHawaiian Airlines
Sat 9/2712:46 pmSEA - HLN
Nonstop1h 35mHawaiian Airlines
Deal found 8/12$177
This Alaska Airlines deal was found by Cheapflights users on 8/11. 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 9/104:02 pmHLN - SEA
Nonstop1h 48mAlaska Airlines
Tue 9/1612:46 pmSEA - HLN
Nonstop1h 35mAlaska Airlines
Deal found 8/11$187
This Alaska Airlines deal was found by Cheapflights users on 8/12. 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 9/244:02 pmHLN - SEA
Nonstop1h 48mAlaska Airlines
Sun 9/2812:46 pmSEA - HLN
Nonstop1h 35mAlaska Airlines
Deal found 8/12$197
This Alaska Airlines deal was found by Cheapflights users on 8/11. 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 9/104:02 pmHLN - SEA
Nonstop1h 48mAlaska Airlines
Mon 9/1512:46 pmSEA - HLN
Nonstop1h 35mAlaska Airlines
Deal found 8/11$207
This Delta deal was found by Cheapflights users on 8/11. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/131:00 pmHLN - SEA
1 stop6h 36mDelta
Tue 9/165:30 amSEA - HLN
1 stop5h 50mDelta
Deal found 8/11$217
This Delta deal was found by Cheapflights users on 8/11. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/101:00 pmHLN - SEA
1 stop7h 00mDelta
Tue 9/165:30 amSEA - HLN
1 stop5h 50mDelta
Deal found 8/11$228
This Alaska Airlines deal was found by Cheapflights users on 8/11. 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.
Mon 9/154:02 pmHLN - SEA
Nonstop1h 48mAlaska Airlines
Tue 9/1612:46 pmSEA - HLN
Nonstop1h 35mAlaska Airlines
Deal found 8/11$237
This Alaska Airlines deal was found by Cheapflights users on 8/11. 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.
Tue 9/94:02 pmHLN - SEA
Nonstop1h 48mAlaska Airlines
Sun 9/1412:46 pmSEA - HLN
Nonstop1h 35mAlaska Airlines
Deal found 8/11$238
This Delta deal was found by Cheapflights users on 8/11. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/101:00 pmHLN - SEA
1 stop7h 00mDelta
Sat 9/135:30 amSEA - HLN
1 stop5h 50mDelta
Deal found 8/11$247
This Alaska Airlines deal was found by Cheapflights users on 8/11. 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 9/104:02 pmHLN - SEA
Nonstop1h 48mAlaska Airlines
Sat 9/1312:46 pmSEA - HLN
Nonstop1h 35mAlaska Airlines
Deal found 8/11$248
This Delta deal was found by Cheapflights users on 8/13. 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 9/241:00 pmHLN - SEA
1 stop4h 40mDelta
Sat 9/275:30 amSEA - HLN
1 stop5h 50mDelta
Deal found 8/13$257
This Delta deal was found by Cheapflights users on 8/11. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/91:00 pmHLN - SEA
1 stop7h 00mDelta
Tue 9/165:30 amSEA - HLN
1 stop5h 50mDelta
Deal found 8/11$258

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 August 13, 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 9/24

4:02 pm-4:50 pm

Nonstop1h 48m

Seattle/Tacoma Intl

Sat 9/27

12:46 pm-3:21 pm

Nonstop1h 35m

$177

HelenaSeattle

HLN - SEA

HLNSEA

Helena

Sat 9/13

4:02 pm-4:50 pm

Nonstop1h 48m

Seattle/Tacoma Intl

Tue 9/16

12:46 pm-3:21 pm

Nonstop1h 35m

$177

HelenaSeattle

HLN - SEA

HLNSEA

Helena

Wed 9/24

4:02 pm-4:50 pm

Nonstop1h 48m

Seattle/Tacoma Intl

Sat 9/27

12:46 pm-3:21 pm

Nonstop1h 35m

$177

HelenaSeattle

HLN - SEA

HLNSEA

Helena

Tue 9/9

4:02 pm-4:50 pm

Nonstop1h 48m

Seattle/Tacoma Intl

Tue 9/16

12:46 pm-3:21 pm

Nonstop1h 35m

$177

HelenaSeattle

HLN - SEA

HLNSEA

Helena

Wed 9/10

4:02 pm-4:50 pm

Nonstop1h 48m

Seattle/Tacoma Intl

Tue 9/16

12:46 pm-3:21 pm

Nonstop1h 35m

$187

HelenaSeattle

HLN - SEA

HLNSEA

Helena

Fri 10/3

4:02 pm-4:50 pm

Nonstop1h 48m

Seattle/Tacoma Intl

Tue 10/7

3:07 pm-5:41 pm

Nonstop1h 34m

$197

HelenaSeattle

HLN - SEA

HLNSEA

Helena

Tue 9/9

4:02 pm-4:50 pm

Nonstop1h 48m

Seattle/Tacoma Intl

Mon 9/15

12:46 pm-3:21 pm

Nonstop1h 35m

$197

HelenaSeattle

HLN - SEA

HLNSEA

Helena

Sat 9/13

4:02 pm-4:50 pm

Nonstop1h 48m

Seattle/Tacoma Intl

Mon 9/15

12:46 pm-3:21 pm

Nonstop1h 35m

$197

HelenaSeattle

HLN - SEA

HLNSEA

Helena

Wed 9/24

4:02 pm-4:50 pm

Nonstop1h 48m

Seattle/Tacoma Intl

Sun 9/28

12:46 pm-3:21 pm

Nonstop1h 35m

$197

HelenaSeattle

HLN - SEA

HLNSEA

Helena

Wed 9/10

4:02 pm-4:50 pm

Nonstop1h 48m

Seattle/Tacoma Intl

Mon 9/15

12:46 pm-3:21 pm

Nonstop1h 35m

$207

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/11

Showing 1-10 of 18 results
1
2

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, January is the cheapest month in which you can book a flight from Helena to Seattle (average of $238). Flying from Helena to Seattle in June is currently the most expensive (average of $389). 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 August 13, 2025.

A simple way to save on the total cost of your ticket is to fly from Helena to Seattle in the evening. If you’re flexible enough to do this you can expect to save up to 16% on your trip compared to booking a flight in the morning.

Weekly flight availability from Helena to Seattle

Explore weekly flight availability from Helena to Seattle. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated August 13, 2025.

The most flights from HLN to SEA are scheduled on a Monday (3 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (3 on average).

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 August 13, 2025.
Peruse reviews from past customers who have flown with Alaska Airlines, Delta, 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
10,000 reviews

Entertainment

7.0

Overall

8.0

Boarding

8.1

Food

7.1

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

EUG - SEA

Mobility support was fabulous No flight entertainment that I was aware of.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.0

Overall

8.0

Boarding

8.1

Food

7.1

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

EUG - SEA

Mobility support was fabulous No flight entertainment that I was aware of.
Delta
8.0
Very good
7,979 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.0

Overall

8.0

Boarding

8.1

Food

7.1

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

EUG - SEA

Mobility support was fabulous No flight entertainment that I was aware of.
Hawaiian Airlines
7.8
Good
2,655 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.0

Overall

8.0

Boarding

8.1

Food

7.1

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

EUG - SEA

Mobility support was fabulous No flight entertainment that I was aware of.

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 3 flights from Helena (HLN) to Seattle/Tacoma Intl (SEA) per day to choose from. Flights to Seattle from Helena are available from 3 different airlines, which means you should have some options if you want to compare airfare deals. 1h 48m 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.

  • 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 $177. Another option worth looking into is Alaska Airlines, starting at $187 round trip. Users have found that Hawaiian Airlines is 40% 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: Alaska Airlines (60%), Horizon Air (60%), Hawaiian Airlines( 60%).

  • What are the cheapest flights from Helena to Seattle?

    On average you can expect to pay $304 for a flight from Helena to Seattle. The cheapest flight overall is $69 while the most popular route, (Helena - Seattle/Tacoma Intl) is currently priced at $177.

  • 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, January is the cheapest month in which you can book a flight from Helena to Seattle (average of $238). Flying from Helena to Seattle in June is currently the most expensive (average of $389). 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
Tukwila
Tacoma
Ocean Shores
Lakewood
Lynnwood
Lacey
Leavenworth
Renton
Olympia
Puyallup
Kent
Cle Elum
Chehalis
Kirkland
Issaquah
Aberdeen
Shoreline
Federal Way
Shelton

Browse thousands of different options on Cheapflights for your next trip

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Top 3 airlines flying from Helena to Seattle

Discover the top 3 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 August 13, 2025.
AirlineCheapestAverageFlexibilityOn-time
Hawaiian AirlinesCheapest$149Average$268FlexibilityNo cancel feeOn-time85%
Alaska AirlinesCheapest$196Average$274FlexibilityNo cancel feeOn-time75%
DeltaCheapest$246Average$551FlexibilityNo cancel feeOn-timeN/A

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