Cheap flights from New Hampshire to Seattle from $147

In general, October is the cheapest month to fly from New Hampshire to Seattle. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $98. If you don’t want to visit Seattle in October, then you should wait until August to fly from New Hampshire, when ticket prices are also cheap, with an average price of $253.

On average, the least expensive day to fly to Seattle from New Hampshire is on a Wednesday. momondo users have found tickets for Wednesday departures for as low as $421. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Monday is the most expensive day to depart from New Hampshire because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $532.

Flying to Seattle from New Hampshire in the afternoon is the least expensive time of day to depart. momondo users have found prices as low as $402 when looking at flights departing in the afternoon. Flights to Seattle are more costly in the morning, with an average ticket price of $482. Departure times in the morning fall within the peak daily travel times, which is why tickets can be more expensive.

You are more likely to see cheaper flights to Seattle from New Hampshire when booking weeks ahead of your departure date. In general, you can expect to find flights to Seattle for around $393 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Seattle from New Hampshire for as low as $347 on momondo.

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

American Airlines, Southwest and United Airlines are the top three most popular airlines that fly to Seattle from New Hampshire according to our data. American Airlines is the first choice among our users, with 59% of people opting to fly with this airline when traveling to Seattle. Keep in mind that there are 4 different airlines that fly to Seattle on a routine basis, so you have a few additional options to choose from.

As of May 2026, there are 117 flights per week flying from New Hampshire to Seattle. The most common day of the week flights depart is Sun, with 21% of flights taking off on this day.

Flight times vary depending on what airport in New Hampshire you fly out of and what airport in Seattle you fly into. For example, flying from Manchester to Seattle takes 8h 05m on average. On the other hand, flying from Lebanon to Seattle takes 9h 27m on average. Keep in mind that it’s always quicker to opt for a non-stop flight, so be sure to check momondo if there are any available for your route.