Cheap flights from Montana to Seattle from $99

In general, April is the cheapest month to fly from Montana to Seattle. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $48. If you don’t want to visit Seattle in April, then you should wait until March to fly from Montana, when ticket prices are also cheap, with an average price of $48.

On average, the least expensive day to fly to Seattle from Montana is on a Friday. momondo users have found tickets for Friday departures for as low as $349. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Sunday is the most expensive day to depart from Montana because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $588.

Flying to Seattle from Montana in the evening is the least expensive time of day to depart. momondo users have found prices as low as $346 when looking at flights departing in the evening. Flights to Seattle are more costly in the afternoon, with an average ticket price of $464. Departure times in the afternoon fall within the peak daily travel times, which is why tickets can be more expensive.

Fly from Helena to Seattle/Tacoma Intl for the best Montana - Seattle/Tacoma Intl flight prices

You are more likely to see cheaper flights to Seattle from Montana when booking weeks ahead of your departure date. In general, you can expect to find flights to Seattle for around $228 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Seattle from Montana for as low as $175 on momondo.

Delta, Alaska Airlines, and Southwest are the most popular carriers operating from Montana to Seattle/Tacoma Intl

Alaska Airlines, Delta and Hawaiian Airlines are the top three most popular airlines that fly to Seattle from Montana according to our data. Alaska Airlines is the first choice among our users, with 85% of people opting to fly with this airline when traveling to Seattle. Keep in mind that there are 3 different airlines that fly to Seattle on a routine basis, so you have a few additional options to choose from.

As of May 2026, 23 flights take off from Montana and land in Seattle each day. The most common flight departure time for this route is 4:00PM, with 46% of daily flights taking off at noon.

The number of flights available between Montana and Seattle is 164 per week as of May 2026. The most frequent departure day is Mon, with 24% of weekly flights leaving on this day.