HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Seattle

$137+ Cheap flights from Helena to Seattle (HLN - SEA)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 3/11. Fares are subject to change and may not be available on all flights or dates of travel.
HLN — SEA
Mar 11 — Mar 181
Wed 3/11
Wed 3/18
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Helena to Seattle with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 February 9, 2026.

This Expedia deal was found by Cheapflights users on 2/8. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/114:36 pm
HLN
-
SEA
Nonstop1h 50m
Alaska Airlines
Wed 3/183:09 pm
SEA
-
HLN
Nonstop1h 36m
Alaska Airlines
Deal found 2/8$137
This Expedia deal was found by Cheapflights users on 2/8. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/26:22 pm
HLN
-
SEA
Nonstop1h 49m
Alaska Airlines
Tue 4/73:09 pm
SEA
-
HLN
Nonstop1h 36m
Alaska Airlines
Deal found 2/8$147
This Alaska Airlines deal was found by Cheapflights users on 2/8. 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 3/34:36 pm
HLN
-
SEA
Nonstop1h 50m
Alaska Airlines
Sun 3/81:21 pm
SEA
-
HLN
Nonstop1h 38m
Alaska Airlines
Deal found 2/8$187
This Delta deal was found by Cheapflights users on 2/9. 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 4/215:40 am
HLN
-
SEA
1 stop4h 35m
Delta
Sat 4/255:35 am
SEA
-
HLN
1 stop5h 49m
Delta
Deal found 2/9$202
This Delta deal was found by Cheapflights users on 2/7. 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 2/281:10 pm
HLN
-
SEA
1 stop4h 38m
Delta
Sun 3/15:30 am
SEA
-
HLN
1 stop5h 55m
Delta
Deal found 2/7$222
This Expedia deal was found by Cheapflights users on 2/8. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/66:22 pm
HLN
-
SEA
Nonstop1h 47m
Alaska Airlines
Fri 5/83:07 pm
SEA
-
HLN
Nonstop1h 38m
Alaska Airlines
Deal found 2/8$227
This Delta deal was found by Cheapflights users on 2/6. 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 3/31:10 pm
HLN
-
SEA
1 stop4h 38m
Delta
Sun 3/85:30 am
SEA
-
HLN
1 stop5h 51m
Delta
Deal found 2/6$251
This Expedia deal was found by Cheapflights users on 2/8. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/56:22 pm
HLN
-
SEA
Nonstop1h 47m
Alaska Airlines
Thu 5/73:07 pm
SEA
-
HLN
Nonstop1h 38m
Alaska Airlines
Deal found 2/8$257
This Orbitz deal was found by Cheapflights users on 2/8. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/46:22 pm
HLN
-
SEA
Nonstop1h 47m
Alaska Airlines
Thu 5/73:07 pm
SEA
-
HLN
Nonstop1h 38m
Alaska Airlines
Deal found 2/8$267
This Expedia deal was found by Cheapflights users on 2/6. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/284:36 pm
HLN
-
SEA
Nonstop1h 50m
Alaska Airlines
Sat 3/71:21 pm
SEA
-
HLN
Nonstop1h 38m
Alaska Airlines
Deal found 2/6$287

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 February 9, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$137
(Alaska Airlines)

Popular in

May

Cheapest in

February

Average price

$148

Good round-trip deal

$234 or less

Good one-way deal

$162 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
Highest demand for flights based on searches. 23% potential increase in price ($75 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($11 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 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 February 9, 2026.
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

Tue 4/21

6:22 pm-7:11 pm

Nonstop1h 49m

Seattle/Tacoma Intl

Sat 4/25

3:07 pm-5:45 pm

Nonstop1h 38m

$137

HelenaSeattle

HLN - SEA

HLNSEA

Helena

Tue 3/3

4:36 pm-5:26 pm

Nonstop1h 50m

Seattle/Tacoma Intl

Sun 3/8

1:21 pm-3:59 pm

Nonstop1h 38m

$187

HelenaSeattle

HLN - SEA

HLNSEA

Helena

Sat 2/28

1:10 pm-4:48 pm

1 stop4h 38m

Seattle/Tacoma Intl

Sat 3/7

5:30 am-12:25 pm

1 stop5h 55m

$202

HelenaSeattle

HLN - SEA

HLNSEA

Helena

Tue 4/21

5:40 am-9:15 am

1 stop4h 35m

Seattle/Tacoma Intl

Sat 4/25

5:35 am-12:24 pm

1 stop5h 49m

$202

HelenaSeattle

HLN - SEA

HLNSEA

Helena

Wed 3/11

1:02 pm-4:41 pm

1 stop4h 39m

Seattle/Tacoma Intl

Wed 3/18

5:30 am-12:21 pm

1 stop5h 51m

$222

HelenaSeattle

HLN - SEA

HLNSEA

Helena

Sat 2/28

1:10 pm-4:48 pm

1 stop4h 38m

Seattle/Tacoma Intl

Sun 3/1

5:30 am-12:25 pm

1 stop5h 55m

$222

HelenaSeattle

HLN - SEA

HLNSEA

Helena

Wed 5/6

6:22 pm-7:09 pm

Nonstop1h 47m

Seattle/Tacoma Intl

Fri 5/8

3:07 pm-5:45 pm

Nonstop1h 38m

$227

HelenaSeattle

HLN - SEA

HLNSEA

Helena

Sun 3/8

4:36 pm-5:26 pm

Nonstop1h 50m

$174

HelenaSeattle

HLN - SEA

HLNSEA

Helena

Fri 3/6

2:30 pm-9:08 pm

1 stop7h 38m

$209

HelenaSeattle

HLN - SEA

HLNSEA

Helena

Fri 2/13

4:36 pm-5:26 pm

Nonstop1h 50m

$254

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/7

Showing 1-10 of 12 results
1
2

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 February.
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, 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 August is currently the most expensive (average of $165). 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 February 9, 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 52% on your trip compared to booking a flight at noon.

How much does it cost to fly round-trip from Helena to Seattle?

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 February 9, 2026.
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
11,863 reviews

Boarding

8.1

Crew

8.5

Comfort

7.8

Overall

8.0

Entertainment

7.0

Food

7.1

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
11,863 reviews
Alaska Airlines
8.0
Very good
11,863 reviews

Boarding

8.1

Crew

8.5

Comfort

7.8

Overall

8.0

Entertainment

7.0

Food

7.1

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
2,830 reviews
Alaska Airlines
8.0
Very good
11,863 reviews

Boarding

8.1

Crew

8.5

Comfort

7.8

Overall

8.0

Entertainment

7.0

Food

7.1

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. 4h 35m 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 $137, Alaska Airlines can have you in Seattle from Helena in 1h 49m. 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 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 $147 round trip. Users have found that Hawaiian Airlines is 52% 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 (82%), Horizon Air (82%), Korean Air( 80%).

  • What are the cheapest flights from Helena to Seattle?

    On average you can expect to pay $272 for a flight from Helena to Seattle. The cheapest flight overall is $108 while the most popular route, (Helena - Seattle/Tacoma Intl) is currently priced at $182.

  • 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 August is currently the most expensive (average of $165). 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
Ocean Shores
Olympia
Lynnwood
Edmonds
Lacey
Renton
Puyallup
Kirkland
Kent
Tukwila
Fife
Aberdeen
Shoreline
Marysville
Centralia
Federal Way
Chehalis

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 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 February 9, 2026.
AirlineCheapestAverageFlexibilityOn-time
Hawaiian AirlinesCheapest$119Average$268FlexibilityNo cancel feeOn-time85%
Alaska AirlinesCheapest$147Average$264FlexibilityNo cancel feeOn-time75%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.