Cheap flights from Phoenix Sky Harbor Intl Airport to Seattle from $104

In general, January is the cheapest month to fly from Phoenix Sky Harbor Intl Airport to Seattle. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $132. If you don’t want to visit Seattle in January, then you should wait until September to fly from Phoenix Sky Harbor Intl Airport, when ticket prices are also cheap, with an average price of $175.

On average, the least expensive day to fly to Seattle from Phoenix Sky Harbor Intl Airport is on a Friday. momondo users have found tickets for Friday departures for as low as $264. 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 Phoenix Sky Harbor Intl Airport because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $436.

Flying to Seattle from Phoenix Sky Harbor Intl Airport at noon is the least expensive time of day to depart. momondo users have found prices as low as $223 when looking at flights departing at noon. Flights to Seattle are more costly in the morning, with an average ticket price of $325. Departure times in the morning fall within the peak daily travel times, which is why tickets can be more expensive.

Fly from Phoenix Sky Harbor Intl to Seattle/Tacoma Intl for the best Phoenix Sky Harbor Intl - Seattle/Tacoma Intl flight prices

You are more likely to see cheaper flights to Seattle from Phoenix Sky Harbor Intl Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Seattle for around $200 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Seattle from Phoenix Sky Harbor Intl Airport for as low as $170 on momondo.

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

Alaska Airlines, Frontier and Delta are the top three most popular airlines that fly to Seattle from Phoenix Sky Harbor Intl Airport according to our data. Alaska Airlines is the first choice among our users, with 38% of people opting to fly with this airline when traveling to Seattle. Keep in mind that there are 7 different airlines that fly to Seattle on a routine basis, so you have a few additional options to choose from.

Historically, on average around 10% of flights between Phoenix and Seattle have experienced a delay on any given week. The average delay length over the past 12 months has been 138 minutes.

Generally, flights departing in the morning tend to experience fewer delays. Flights at night have, in the past, seen delays more frequently in comparison.

Saturday is statistically the day of the week which experiences the fewest number of delays on this flight route. Monday has historically seen more delays on average compared to the rest of the week.

According to our data, Delta have had the least number of delays on this route over the last 12 months; with about 7% of their flights experiencing any sort of delay.

29 flights are operational daily from Phoenix Sky Harbor Intl Airport to Seattle as of May 2026. The most popular departure time for this route is 12:00PM, with 49% of flights per day taking off in the afternoon.

As of May 2026, 205 flights take off from Phoenix Sky Harbor Intl Airport and land in Seattle each week. The most common flight departure day for this route is Mon, with 22% of weekly flights taking off on this day.