The cheapest times to fly from HLN to SEA are
- January 8th to March 11th (except the week of February 26th)
- April 2nd to April 22nd
- August 13th to November 18th
based on data collected exclusively by Champion Traveler across tens of millions of flights. Among all the dates above, the very cheapest time to fly from HLN to SEA is early October. Prices can be as high as $840 for Sunday flights during late July, or as low as $214 for Wednesday flights around early October.
When to Fly to Seattle
Flying from Helena, MT (HLN) to Seattle, WA (SEA) will usually cost between $216 to $381 per person if booking more than four weeks in advance. On average the very cheapest time to fly is early October with an average ticket price of $270. Due to high demand the most expensive time to fly is late July, with an average price of $449. Planning your trip to low-cost times can easily save you $180 on economy flights and even more on first-class flights. Generally, any price below $312 can be considered a good price for a round-trip HLN to SEA flight.
See below for a graph of average weekly prices for the HLN to SEA route. All prices are for round-trip tickets in USD.
Compared to other flights, the HLN to SEA flight is much cheaper than the average and costs much less than the average flight leaving from Helena. The average price per mile (for a direct flight) is $0.4, which is a bit above average.
Flight Prices by Day of the Week
Wednesday is usually the cheapest day to depart and return on this flight. Sundays are the most expensive days to fly to Seattle, and Fridays are the most expensive days to return to Helena. Selecting flights on the least expensive days could save you up to $64 (19%) on this flight.
Departing prices are for round-trip flights returning on the day of departure. For example, a flight departing on Wednesday and returning a week later will cost an average of $276. Return trip prices are from the SEA to HLN flight, and often highlight the quality of our data in showing the same trend.
Departing Prices by Day
Return Trip Prices by Day
Nonstop Flights and Layovers
Travelers looking to fly from HLN to SEA can generally find a 0-layover flight. Because there is a direct flight option the real-world direct flight time of 1 hour 52 minutes may be realistic.
Flight Questions Answered
Still have questions about flying from HLN to SEA? We’ve got answers.
Which airlines fly this route?
You can find 4 major airlines flying this route most often: Alaska, American, Delta, United, and potentially more during busy seasons.
How far away is it from Seattle/Tacoma International Airport to Helena Regional Airport?
The distance between the two airports is roughly 489 miles or 787 kilometers.
How long does it take to fly from HLN to SEA?
The real-world flight time for a nonstop HLN to SEA flight is about 1 hour 52 minutes.
How many flights go between Helena, MT and Seattle, WA?
It depends on the day of the week and the date, but a typical day might have around 114 available flights from HLN to SEA.
Airport Location Info
|Origination airport name||Helena Regional Airport|
|Country||the United States|
|Destination airport name||Seattle/Tacoma International Airport|
|Country||the United States|
Please note that while we’ve worked hard to analyzed tens of millions of flights to get you this data, we do not calculate current live prices or guarantee pricing. Please see our partners using the links above for current offers.