£137 Cheap Flights from Helena (HLN) to Seattle (SEA)

View £137 flight on Fri, 10 Jul 2026Opens in a new window

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Popular airlines from Helena, MT (HLN-Helena Regional) to Seattle-Tacoma International Airport (SEA)

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Cheap Flights from Helena (HLN) to Seattle (SEA)

Prices were available within the past 7 days and start at £137 for one-way flights and £139 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Alaska Airlines
Sat, 22 Aug - Sat, 29 Aug
HLN
Helena
SEA
Seattle
£139 Return, found 4 days ago
£139
Return
found 4 days ago
Select Alaska Airlines flight, departing Sat, 22 Aug from Helena to Seattle, returning Sat, 29 Aug, priced at £139 found 4 days ago
Alaska Airlines
Thu, 9 Jul - Thu, 16 Jul
HLN
Helena
SEA
Seattle
£229 Return, found 3 days ago
£229
Return
found 3 days ago
Select Alaska Airlines flight, departing Thu, 9 Jul from Helena to Seattle, returning Thu, 16 Jul, priced at £229 found 3 days ago
Alaska Airlines
Sat, 8 Aug - Sat, 15 Aug
HLN
Helena
SEA
Seattle
£239 Return, found 5 days ago
£239
Return
found 5 days ago
Select Alaska Airlines flight, departing Sat, 8 Aug from Helena to Seattle, returning Sat, 15 Aug, priced at £239 found 5 days ago
Alaska Airlines
Wed, 15 Jul - Wed, 22 Jul
HLN
Helena
SEA
Seattle
£241 Return, found 3 days ago
£241
Return
found 3 days ago
Select Alaska Airlines flight, departing Wed, 15 Jul from Helena to Seattle, returning Wed, 22 Jul, priced at £241 found 3 days ago
Alaska Airlines
Fri, 10 Jul - Fri, 17 Jul
HLN
Helena
SEA
Seattle
£247 Return, found 3 days ago
£247
Return
found 3 days ago
Select Alaska Airlines flight, departing Fri, 10 Jul from Helena to Seattle, returning Fri, 17 Jul, priced at £247 found 3 days ago
Alaska Airlines
Thu, 9 Jul - Thu, 16 Jul
HLN
Helena
SEA
Seattle
£281 Return, found 3 days ago
£281
Return
found 3 days ago
Select Alaska Airlines flight, departing Thu, 9 Jul from Helena to Seattle, returning Thu, 16 Jul, priced at £281 found 3 days ago
Alaska Airlines
Wed, 15 Jul - Wed, 22 Jul
HLN
Helena
SEA
Seattle
£292 Return, found 3 days ago
£292
Return
found 3 days ago
Select Alaska Airlines flight, departing Wed, 15 Jul from Helena to Seattle, returning Wed, 22 Jul, priced at £292 found 3 days ago
Alaska Airlines
Sun, 12 Jul - Sun, 19 Jul
HLN
Helena
SEA
Seattle
£345 Return, found 3 days ago
£345
Return
found 3 days ago
Select Alaska Airlines flight, departing Sun, 12 Jul from Helena to Seattle, returning Sun, 19 Jul, priced at £345 found 3 days ago
Alaska Airlines
Thu, 9 Jul - Thu, 16 Jul
HLN
Helena
SEA
Seattle
£348 Return, found 3 days ago
£348
Return
found 3 days ago
Select Alaska Airlines flight, departing Thu, 9 Jul from Helena to Seattle, returning Thu, 16 Jul, priced at £348 found 3 days ago
Alaska Airlines
Thu, 9 Jul - Thu, 16 Jul
HLN
Helena
SEA
Seattle
£356 Return, found 3 days ago
£356
Return
found 3 days ago
Select Alaska Airlines flight, departing Thu, 9 Jul from Helena to Seattle, returning Thu, 16 Jul, priced at £356 found 3 days ago

Frequently asked questions

How long does it take to fly from Helena, MT (HLN-Helena Regional) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
Flying nonstop from HLN to SEA takes around 2 hours, with the route covering approximately 489 miles. Flights with a layover typically take 5 hours 50 minutes longer than direct options. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.
Can you fly business or first class from Helena, MT (HLN-Helena Regional) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
Select the "Business class" and "First class" filters when looking for HLN to SEA flights on Expedia. This is the easiest way to compare prices, routes and flight times for your trip.
What airports do you fly into for Seattle from Helena Regional (HLN)?
If you're planning to travel to Seattle from Helena Regional (HLN), you can fly directly into Seattle - Tacoma Intl. (SEA) Some flights may connect through major hubs like Salt Lake City Intl. (SLC), Denver Intl. (DEN) before reaching Seattle. Compare routes and airports on Expedia to find the best flight options for your travel plans.

Travel information

Origin airport
Helena Regional
Destination airport
Seattle - Tacoma Intl.
Return price
£139
Distance
781 km
Average flight time
1 hour 52 mins

Book with confidence

Compare flights from Helena to Seattle easily and book with confidence

For travelling on business or for pleasure, Expedia makes it easy to book your flights from Helena to Seattle. Operating between them flights per day, 20 airlines cover the route. And fly direct, getting you to Seattle - Tacoma Intl. in just hours. If you have a preferred carrier, use our advanced search tool to find the right flight from Helena Regional to Seattle - Tacoma Intl..  

To make things even better, in the advanced search, you can also choose to fly economy, premium economy, business or first class, select your maximum number of stops, and pick your preferred departure and arrival time. You can also opt for refundable and direct flights. 

Grab a great deal on your flight from Helena Regional (HLN) to Seattle - Tacoma Intl. (SEA)

The easiest way to view the best deals on flights from Helena to Seattle today is to enter your travel dates and hit search. From here, you can sort your results by price to see the cheapest flights first. Right now, return flights from Helena Regional to Seattle - Tacoma Intl. start at just £139 and range up to £356.  

To find an even better deal, try  

  • being flexible on your dates – midweek flights can be cheaper
  • looking for other airports near Helena and Seattle
  • booking your flight during August, the cheapest month on this route
  • varying your flight times – early morning and late at night are sometimes cheaper 

Why you should book your Helena to Seattle flight with Expedia!

We cater for all flight types, cabin classes and airlines. So whether you’re booking flights from Helena Regional to Seattle - Tacoma Intl. for a budget break or a business trip with a bit of pleasure thrown in, we make it easy to secure the seat that’s right for you.  

Thanks to our supersized inventory that offers great choice all in one place, you know you’ll get a great deal with Expedia. Especially if you bundle your flight together with your hotel, you will unlock amazing savings. For added peace of mind, you can choose flexible bookings or filter to find refundable options, so you won’t pay a fee to change your flight.  

Compare flights from Helena to Seattle easily and book with confidence

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