Cheap Flights from Helena to Seattle

Compare Helena to Seattle flight deals

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Flight deals from Helena Airport 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 R 2,734. Find the lowest prices on one-way and return tickets right here.

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 May.

Direct flights from Helena to Seattle

Helena to Seattle: Flight information

The things to know before you go.
Cheapest flight foundR 1,747
Cheapest month to flyMay
Average flight time1 hr, 52 mins
Most popular airlineHorizon Air
Average flights per week25

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 R 2,748. 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 52 minutes is the average flight time from Helena to Seattle.
Horizon Air, Alaska Airlines and Korean Air fly direct from Helena to Seattle.
As of April 2026, there are 25 flights per week flying from Helena to Seattle.
The cheapest month to fly from Helena to Seattle is usually April.
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 R 2,748.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Helena Airport to Seattle on Friday, 24 April 2026.
Yes – the average flight time is 1 hour and 52 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 April, the average temperature is usually around 8°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, Alaska Airlines offers the cheapest flight tickets to Seattle.

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

  • Expect to be travelling for 1 hour 35 minutes. On average, that's the time it takes for 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-7 timezone.

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

  • To avoid rushing for your HLN to Seattle flight, leave plenty of time for things like check-in and baggage drop. Arriving two hours ahead of international departures and an hour before domestic flights is the general rule.

  • Heading away during a peak time like public or school holidays? Expect longer lines at check-in and security. To give yourself peace of mind, arrive up to four hours before international flights and two hours ahead of domestic departures.

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

  • Check out the promotions from Alaska Airlines. This carrier has direct flights from Helena Regional Airport to Seattle.

  • HLN is around 5 kilometres from central Helena. If you're ride-sharing, driving or catching a cab from the centre, it'll take you 15 minutes or so to get there, depending on traffic. If you're planning to take public transport, expect the journey time to be around 1 hour 50 minutes.

  • In search of a hotel near HLN? If you've booked an early flight from Helena Regional Airport to Seattle, these stays put the terminal practically at your doorstep:

  • Helena Regional Airport maintains a solid on-time performance, so you're less likely to experience disruptions. Departures from HLN touch down on schedule 85.76% of the time.

  • HLN is located at 2850 Mercer Loop.

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

  • R 1,747 is currently the best price for a one-way Helena Regional Airport to Seattle flight. A return flight ticket starts at R 2,748. These fares can change based on availability.

  • Lock in cheap flights from HLN to Seattle by booking five months ahead. Based on our research, that's the best time for picking up a bargain.

  • The best month for landing cheap Helena Regional Airport to Seattle tickets is September. Use the 'Whole month' tool to compare all available prices, then select the dates that offer the biggest savings.

  • You don't need to check in daily to see if fares have dropped when you create a Price Alert. We'll notify you when there's an even bigger deal on cheap flights from HLN to Seattle.

  • Find a cheap flight from Helena Regional Airport to Seattle with the help of our filters. Choose your preferred times, number of stops and airlines, 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 20 minutes to reach the centre driving.

  • It typically takes 55 minutes to get there by public transport.

  • The last thing you want is a lengthy journey to your hotel if you're arriving on a late flight from Helena Regional Airport to Seattle. Book one of these accommodation options near SEA instead:

  • Explore without limits with a Seattle-Tacoma International Airport rental car. Pick up a set of wheels from Thrifty, Europcar or Budget and experience more of Seattle and beyond.

  • Reserving your ride from Seattle-Tacoma International Airport around one week in advance of your flight from HLN to Seattle can help you get the best possible rate.

Lake Union Sea Plane Base Airport (LKE)

  • Lake Union Sea Plane Base Airport (LKE) is about 3 kilometres from the centre of Seattle. Once you've hopped off your flight from Helena Regional Airport to Seattle, it'll take you around 10 minutes to reach the heart of the city in a ride-share or cab.

  • If you're catching public transport, it'll take about 25 minutes.

  • There are some comfortable places to park your luggage (and yourself) near LKE. Kick back and get cosy after your HLN to Seattle flight at any of these perfectly located options:

Best time to go to Seattle

  • Carefully consider your travel dates before booking your flight from Helena Regional Airport to Seattle. The city buzzes during high season, but hotel rates are typically higher and major attractions can get busy. Visit Seattle in low season if you like a more relaxed vibe.

  • The warmest month in Seattle is August, with temperatures ranging between 12ºC (54ºF) and 28ºC (82ºF). Lock in your Helena Regional Airport to Seattle flight ticket then if that's your idea of comfortable weather.

  • If you like cooler conditions, search for a cheap ticket from HLN to Seattle in February when temperatures average between -1ºC (30ºF) and 11ºC (52ºF).

More about Seattle

  • Start your Seattle trip off on the right foot by choosing the perfect place to stay. As soon as you've booked your flight from Helena Regional Airport to Seattle, browse our range of accommodation options including:

  • All great journeys should include some sightseeing. LMN Architects, Greyhound: Bus Station and Boeing Radiation Effects Lab are must-do's during your Seattle adventure.

Explore more of United States

  • You've seen Seattle, now it's time to explore other parts of United States. Travel around 241 kilometres south to Portland to tick off its leading attractions. From Pioneer Courthouse Square to Portland Japanese Garden and Pittock Mansion, your itinerary will be busy.

  • Spokane is another well-known destination in United States and is around 370 kilometres east of Seattle. No journey is complete without experiencing Manito Park, Northwest Museum of Arts & Culture and Spokane Falls.

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