HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Seattle

$89+ 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 9/13. Fares are subject to change and may not be available on all flights or dates of travel.
HLN — SEA
Jul 16 — Jul 231
Wed 7/16
Wed 7/23
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.

Cheapflights Tip: The best prices from Helena to Seattle/Tacoma Intl are usually found in January or February, booked 17 days in advance, depart on a Thursday or Wednesday and return on a Friday

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 July 11, 2025.

Round-trip from

$177
(Alaska Airlines)

One-way from

$89
(Hawaiian Airlines)

Popular in

November

Cheapest in

January

Average price

$303

Good round-trip deal

$268 or less

Good one-way deal

$163 or less
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 ($50 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease ($18 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 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

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 July 11, 2025.

This Alaska Airlines deal was found by Cheapflights users on 7/8. 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.
Sat 8/164:08 pmHLN - SEA
Nonstop1h 47mAlaska Airlines
Sat 8/3012:46 pmSEA - HLN
Nonstop1h 35mAlaska Airlines
Deal found 7/8$177
This Hawaiian Airlines deal was found by Cheapflights users on 7/9. 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/164:08 pmHLN - SEA
Nonstop1h 47mHawaiian Airlines
Mon 8/2512:46 pmSEA - HLN
Nonstop1h 35mHawaiian Airlines
Deal found 7/9$197
This Delta deal was found by Cheapflights users on 7/10. 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.
Fri 8/151:00 pmHLN - SEA
1 stop6h 25mDelta
Mon 8/257:10 amSEA - HLN
1 stop4h 10mDelta
Deal found 7/10$237
This United Airlines deal was found by Cheapflights users on 7/10. 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.
Fri 8/155:39 pmHLN - SEA
1 stop6h 20mUnited Airlines
Mon 8/255:02 amSEA - HLN
1 stop7h 28mUnited Airlines
Deal found 7/10$277
This United deal was found by Cheapflights users on 7/10. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/115:20 pmHLN - SEA
1 stop7h 08mMultiple Airlines
Tue 9/2312:46 pmSEA - HLN
Nonstop1h 35mMultiple Airlines
Deal found 7/10$496

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 July 11, 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

Sat 8/16

4:08 pm-4:55 pm

Nonstop1h 47m

Seattle/Tacoma Intl

Sat 8/30

12:46 pm-3:21 pm

Nonstop1h 35m

$177

HelenaSeattle

HLN - SEA

HLNSEA

Helena

Sat 8/16

4:08 pm-4:55 pm

Nonstop1h 47m

Seattle/Tacoma Intl

Mon 8/25

12:46 pm-3:21 pm

Nonstop1h 35m

$197

HelenaSeattle

HLN - SEA

HLNSEA

Helena

Fri 8/15

1:00 pm-6:25 pm

1 stop6h 25m

Seattle/Tacoma Intl

Mon 8/25

7:10 am-12:20 pm

1 stop4h 10m

$237

HelenaSeattle

HLN - SEA

HLNSEA

Helena

Fri 8/15

5:39 pm-10:59 pm

1 stop6h 20m

Seattle/Tacoma Intl

Tue 8/26

5:02 am-1:30 pm

1 stop7h 28m

$277

HelenaSeattle

HLN - SEA

HLNSEA

Helena

Thu 9/11

5:20 pm-11:28 pm

1 stop7h 08m

Seattle/Tacoma Intl

Tue 9/23

12:46 pm-3:21 pm

Nonstop1h 35m

$496

HelenaSeattle

HLN - SEA

HLNSEA

Helena

Sat 9/13

4:02 pm-4:50 pm

Nonstop1h 48m

$89

HelenaSeattle

HLN - SEA

HLNSEA

Helena

Mon 9/15

4:02 pm-4:50 pm

Nonstop1h 48m

$109

HelenaSeattle

HLN - SEA

HLNSEA

Helena

Wed 9/17

5:20 pm-10:59 pm

1 stop6h 39m

$139

HelenaSeattle

HLN - SEA

HLNSEA

Helena

Sat 9/13

5:45 am-9:07 am

1 stop4h 22m

$149

HelenaSeattle

HLN - SEA

HLNSEA

Helena

Thu 7/17

6:30 am-4:58 pm

2 stops11h 28m

$603

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/10

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

How far ahead should I book a flight from Helena to Seattle?

Use this chart to determine the optimal time to book a round-trip flight from Helena to Seattle. Price data was last updated on June 27, 2025.

To ensure you get the cheapest price possible for a flight from Helena to Seattle, you should look to book at least 16 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

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 $388). 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 July 11, 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 12% on your trip compared to booking a flight in the afternoon.

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 July 11, 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 July 11, 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

Food

7.1

Overall

8.0

Boarding

8.1

Comfort

7.8

Entertainment

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Overall

8.0

Boarding

8.1

Comfort

7.8

Entertainment

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Delta
8.0
Very good
7,952 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Overall

8.0

Boarding

8.1

Comfort

7.8

Entertainment

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Hawaiian Airlines
7.8
Good
2,561 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Overall

8.0

Boarding

8.1

Comfort

7.8

Entertainment

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
United Airlines
7.4
Good
8,846 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Overall

8.0

Boarding

8.1

Comfort

7.8

Entertainment

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

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 2 different airlines, which means you should have some options if you want to compare airfare deals. 1h 47m 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 Alaska Airlines is currently your cheapest option to Seattle, with prices starting at $177. Additional round-trip tickets that might be worth considering are offered by Hawaiian Airlines and Delta, with the lowest prices starting at $197 and $237, respectively. Users have found that Alaska Airlines is 40% cheaper than the other options available to this destination.

  • What are the cheapest airlines to fly from Helena to Seattle one-way?

    For one-way options, check prices for Hawaiian Airlines. According to our data, you can fly for as low as $89. Users have also found prices from $109 and $139 on Alaska Airlines and United Airlines, respectively.

  • 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 (62%), Korean Air (62%), Hawaiian Airlines( 56%).

  • What are the cheapest flights from Helena to Seattle?

    On average you can expect to pay $261 for a flight from Helena to Seattle. The cheapest flight overall is $119 while the most popular route, (Helena - Seattle/Tacoma Intl) is currently priced at $197.

  • 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 $388). 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 Helena?

Book flights to Helena if you plan to visit one of these locations
SeaTac
Tukwila
Tacoma
Lakewood
Ocean Shores
Lacey
Leavenworth
Lynnwood
Renton
Olympia
Shoreline
Puyallup
Cle Elum
Centralia
Kent
Chehalis
Kirkland
Aberdeen
Federal Way
Shelton

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 July 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
Alaska AirlinesCheapest$186Average$271FlexibilityNo cancel feeOn-time75%
DeltaCheapest$246Average$551FlexibilityNo cancel feeOn-timeN/A

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.