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

Compare Helena to Seattle flight deals

Find the cheapest month or even day of the year to fly to Seattle

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Flight deals from Helena to Seattle

Looking for a cheap last-minute deal or the best return flight from Helena Airport to Seattle? If you want to travel next month, return fares start from $607. Find the lowest prices on one-way and return tickets right here.
Seattle.$287 per passenger.Departing Wed, 16 Sep, returning Wed, 23 Sep.Return flight with Delta.Outbound indirect flight with Delta, departs from Helena on Wed, 16 Sep, arriving in Seattle / Tacoma International.Inbound indirect flight with Delta, departs from Seattle / Tacoma International on Wed, 23 Sep, arriving in Helena.Price includes taxes and charges.From $287, select.
Seattle.$413 per passenger.Departing Tue, 14 Jul, returning Wed, 26 Aug.Return flight with Delta.Outbound indirect flight with Delta, departs from Helena on Tue, 14 Jul, arriving in Seattle / Tacoma International.Inbound indirect flight with Delta, departs from Seattle / Tacoma International on Wed, 26 Aug, arriving in Helena.Price includes taxes and charges.From $413, select.
Seattle.$477 per passenger.Departing Sat, 22 Aug, returning Wed, 2 Sep.Return flight with Delta.Outbound indirect flight with Delta, departs from Helena on Sat, 22 Aug, arriving in Seattle / Tacoma International.Inbound indirect flight with Delta, departs from Seattle / Tacoma International on Wed, 2 Sep, arriving in Helena.Price includes taxes and charges.From $477, select.
Seattle.$490 per passenger.Departing Mon, 29 Jun, returning Sun, 5 Jul.Return flight with Delta.Outbound indirect flight with Delta, departs from Helena on Mon, 29 Jun, arriving in Seattle / Tacoma International.Inbound indirect flight with Delta, departs from Seattle / Tacoma International on Sun, 5 Jul, arriving in Helena.Price includes taxes and charges.From $490, select.
Seattle.$490 per passenger.Departing Fri, 12 Mar, returning Fri, 19 Mar.Return flight with Delta.Outbound indirect flight with Delta, departs from Helena on Fri, 12 Mar, arriving in Seattle / Tacoma International.Inbound indirect flight with Delta, departs from Seattle / Tacoma International on Fri, 19 Mar, arriving in Helena.Price includes taxes and charges.From $490, select.
Seattle.$532 per passenger.Departing Sun, 21 Jun, returning Wed, 26 Aug.Return flight with Delta.Outbound indirect flight with Delta, departs from Helena on Sun, 21 Jun, arriving in Seattle / Tacoma International.Inbound indirect flight with Delta, departs from Seattle / Tacoma International on Wed, 26 Aug, arriving in Helena.Price includes taxes and charges.From $532, select.
Seattle.$533 per passenger.Departing Wed, 24 Jun, returning Tue, 30 Jun.Return flight with Delta.Outbound indirect flight with Delta, departs from Helena on Wed, 24 Jun, arriving in Seattle / Tacoma International.Inbound indirect flight with Delta, departs from Seattle / Tacoma International on Tue, 30 Jun, arriving in Helena.Price includes taxes and charges.From $533, select.
Seattle.$607 per passenger.Departing Wed, 1 Jul, returning Wed, 8 Jul.Return flight with Delta.Outbound indirect flight with Delta, departs from Helena on Wed, 1 Jul, arriving in Seattle / Tacoma International.Inbound indirect flight with Delta, departs from Seattle / Tacoma International on Wed, 8 Jul, arriving in Helena.Price includes taxes and charges.From $607, select.
Seattle.$807 per passenger.Departing Sun, 9 Aug, returning Fri, 14 Aug.Return flight with Delta.Outbound indirect flight with Delta, departs from Helena on Sun, 9 Aug, arriving in Seattle / Tacoma International.Inbound indirect flight with Delta, departs from Seattle / Tacoma International on Fri, 14 Aug, arriving in Helena.Price includes taxes and charges.From $807, select.

Find the cheapest month to fly from Helena to Seattle

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Helena to Seattle flights are currently cheapest in September.
Jun
from $533
Jul
from $607
Aug
from $807
Sep
from $287
Oct
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Nov
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Dec
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Jan
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Feb
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Mar
from $490
Apr
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May
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Direct flights from Helena to Seattle

Alternative Helena to Seattle routes

Looking for the cheapest, fastest or easiest route from Helena to Seattle? You could fly into the following airports instead.

Seattle Lake Union SPB

2km from central Seattle
Closest
Search flights

Seattle Boeing Fld

11km from central Seattle
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Seattle / Tacoma International

20km from central Seattle
Cheapest
from $287
Search flights

Paine Field

33km from central Seattle
Search flights

Helena to Seattle: Flight information

The things to know before you go.
Cheapest flight found$287
Cheapest month to flySeptember
Average flight time1 hr, 53 mins
Most popular airlineQatar Airways
Average flights per week24

Finding cheap flights from Helena to Seattle: Frequently asked questions

There are 4 airports in Seattle: Seattle Lake Union SPB, Seattle Boeing Fld, Seattle / Tacoma International, and Paine Field.
The best price we found for a return flight from Helena to Seattle is $287. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
1 hour and 53 minutes is the average flight time from Helena to Seattle.
Qatar Airways, Horizon Air and Alaska Airlines fly direct from Helena to Seattle.
As of June 2026, there are 24 flights per week flying from Helena to Seattle.
The cheapest month to fly from Helena to Seattle is usually September.
If you're flying from Helena Airport, the cheapest airport near Seattle is Seattle / Tacoma International – which is 19.5 km away from the centre of Seattle. We've found flights into this airport from $287.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Helena Airport to Seattle on Wednesday, 16 September 2026.
Yes – the average flight time is 1 hour and 53 minutes.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Seattle but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Seattle is around 40 days in advance, so don’t leave your flight to the last minute.
In June, the average temperature is usually around 14°C. August is typically the warmest month in Seattle, when it usually averages around 23°C. You can expect the least rain in July. The coldest month is December, with temperatures averaging 0°C. The rainiest month is November.
Currently, Delta offers the cheapest flight tickets to Seattle.

Flying from Helena Regional Airport (HLN) to Seattle: what you need to know

  • Around 1 hour 35 minutes is how long you can expect to be travelling on a direct flight from Helena Regional Airport to Seattle.

  • Seattle is one hour behind Helena, where Helena Regional Airport is located. Seattle runs on the UTC-8 timezone.

  • The busiest route is from Helena Regional Airport (HLN) to Seattle-Tacoma International Airport (SEA). You can select from six services every week between these two airports. Alaska Airlines offers a 16:08 departure between HLN and SEA.

  • Give yourself enough time to get on your HLN to Seattle flight. A good rule of thumb is to arrive two hours before international departures and an hour ahead for domestic flights.

  • Travelling during a peak time like July? School holidays and other high seasons can lead to longer lines and delays at security. Play things extra safe and arrive up to four hours ahead of international flights and two hours before domestic departures.

  • You can book a direct Helena Regional Airport to Seattle ticket. Begin your trip at HLN and end it at Seattle-Tacoma International Airport (SEA).

  • Book your favourite seat with Alaska Airlines. This well-known airline offers direct flights from Helena Regional Airport to Seattle.

  • Located around 5 kilometres from central Helena, HLN can be reached in about 15 minutes by car, depending on traffic. Travelling on public transport takes roughly 25 minutes.

  • Want an easy start to your travels? Stay near HLN. Whether you're boarding an early flight from Helena Regional Airport to Seattle or just don't like being rushed, these hotels are a convenient choice:

  • 85% of flights departing from Helena Regional Airport land at their destination on time. Given its impressive on-time stats, disruptions are unlikely when setting off from HLN.

  • HLN is located at 2850 Mercer Loop.

How to find the cheapest flights from Helena Regional Airport (HLN) to Seattle

  • $200 is currently the best price for a one-way Helena Regional Airport to Seattle flight. Return plane tickets start from $287. These prices can change depending on demand.

  • To secure cheap flights from HLN to Seattle, reserve your trip four months before your planned departure.

  • September is the best month for landing an amazing deal on Helena Regional Airport to Seattle tickets. If you want to travel during a different time of year, the 'Whole month' tool will give you the lowest prices for every month.

  • Locking in a cheap flight from HLN to Seattle is easy with Price Alerts. All you need to do is set up one of these automatic notifications and we'll let you know when a new discount appears.

  • Find a cheap flight from Helena Regional Airport to Seattle with the help of our filters. Select your preferred times, airlines and number of stops, then sort the results by 'Cheapest' for the best deals.

Airports in Seattle

Seattle-Tacoma International Airport (SEA)

  • The distance from Seattle-Tacoma International Airport (SEA) to central Seattle is roughly 23 kilometres. It takes about 25 minutes to reach the centre driving.

  • If you're travelling by public transport, expect a journey time of around 35 minutes.

  • Consider booking a hotel near SEA if you're coming in on a late flight from Helena Regional Airport to Seattle. Select one of these accommodation options and avoid the hassle of a long transfer:

  • Booking your ride from Seattle-Tacoma International Airport around one week before your flight from HLN to Seattle can help you get the lowest rate.

Seattle Paine Field International Airport (PAE)

  • After your flight from Helena Regional Airport to Seattle has touched down, you can get to the city centre in about 40 minutes by car. Central Seattle is roughly 40 kilometres from Seattle Paine Field International Airport (PAE).

  • If you travel by public transport, you'll get to the city centre in 1 hour 30 minutes or so.

  • Hang the 'Do not disturb' sign on your door and rest at a hotel near PAE. Here are a few options where you can tuck yourself in after your HLN to Seattle flight:

  • Avoid the long lines and paperwork at the rental desk by having everything prearranged. Secure your ride from PAE a few weeks in advance so you can just grab the keys and get going.

King County International Airport (BFI)

  • Make tracks for the city centre after your flight from Helena Regional Airport to Seattle has arrived. Central Seattle is around 11 kilometres from King County International Airport (BFI) and takes roughly 20 minutes to get to by car.

  • Public transport can get you there in about 35 minutes.

  • Check in to a hotel close to BFI and go from the plane to your bed in a flash. Whether you have a late HLN to Seattle flight or just want to keep your travel plans simple, these accommodation options are all about convenience:

  • Booking a couple of weeks in advance of your flight from Helena Regional Airport to Seattle is always smart. Along with better prices, you'll get a better selection of vehicle makes and models at BFI.

Best time to go to Seattle

  • December is the quietest month for flights from Helena Regional Airport to Seattle, while July is the busiest. Figure out the ideal time to visit Seattle based on whether you prefer a lively atmosphere or a more laid-back vibe.

  • Before booking a Helena Regional Airport to Seattle plane ticket, think about the kind of weather you prefer. August is the warmest month in Seattle, with temperatures ranging from 12ºC (54ºF) to 28ºC (82ºF).

  • Look for cheap tickets from HLN to Seattle in February if you want to travel in cooler conditions. Temperatures are at their lowest then, ranging between -1ºC (30ºF) and 11ºC (52ºF) on average.

More about Seattle

  • Start your Seattle trip off on the right foot by choosing the ideal place to stay. Once you've booked your flight from Helena Regional Airport to Seattle, check out our selection of hotels including:

  • There are so many things to discover in this city it can be hard to work out where to begin. Pike Place Market, Space Needle and Seattle Skyline are major attractions which should feature on any good Seattle itinerary.

Explore more of the United States

  • Seattle is always a good idea, but there are so many other corners of the United States waiting to be explored. About 241 kilometres south of Seattle, a trip to Portland will fill your itinerary to the brim. Start with leading attractions like Portland Japanese Garden, Peninsula Park Rose Garden and Beyond Van Gogh Portland.

  • Around 370 kilometres east of Seattle, Spokane is another favourite stop in the United States. No visit is complete without checking out Riverside State Park, Spokane Falls (Upper Falls) and Cathedral of Our Lady of Lourdes.

Plan the rest of your trip from Helena to Seattle

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.