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Flights from Phoenix to Seattle

Airlines operating flights from Phoenix to Seattle

Choose from 2 airlines flying from Phoenix to Seattle, including Alaska Airlines, Frontier Airlines and . Frontier Airlines currently offers the cheapest ticket on this route.
Alaska Airlines logo Alaska Airlines
Frontier Airlines logo Frontier Airlines
Airlines are determined based on actual purchased flight tickets from Phoenix to Seattle according to previous 12 months data from Trip.com.

Find the cheapest direct flight options from Phoenix to Seattle over the next three months. Book one-way tickets from £22 and round-trip tickets from £43.

Displayed flight fares from Phoenix to Seattle are based on average prices across airlines for the next 3 months, according to the latest Trip.com database.

Flight details for Phoenix to Seattle

The distance between Phoenix and Seattle is 1,780.78km. It takes around 3 hours 23 minutes on average to fly from Phoenix to Seattle. Based on Trip.com's data, travel demand peaks in July. The off-season for travel is November.

Cheapest one-way flight price£22
Cheapest return ticket price£43
Off-season travel monthNovember
Peak season for travelJuly
Flight distance1,780.78km
Average flight time3 hours 23 minutes
Popular airlineAlaska Airlines
Flight statistics for the Phoenix–Seattle route are based on aggregated booking data from Trip.com over the past 12 months.

Trip.com price insights on flights from Phoenix to Seattle

What is the cheapest month for one-way flights from Phoenix to Seattle?

The average one way ticket price paid by Trip.com users from Phoenix to Seattle in each month over the past 12 months.

Based on Trip.com data, the cheapest month to fly from Phoenix to Seattle is October, with an average price of £88. The most expensive month is usually August, with average prices reaching £153.

£153
£121
£88
£56
    Cheapest
  • £108
    Mar
  • £114
    Apr
  • £94
    May
  • £94
    Jun
  • £113
    Jul
  • £153
    Aug
  • £102
    Sep
  • £88
    Oct
  • £104
    Nov
  • £117
    Dec
  • £146
    Jan
  • £111
    Feb

Which day of the week is cheapest to fly from Phoenix to Seattle?

Data is based on the past 12 months and shows the average weekly airfare from Phoenix to Seattle on different days of the week according to Trip.com.

Based on Trip.com data from the past 12 months, the cheapest day to fly from Phoenix to Seattle is Thursday. The average fare on this day is usually lower than on other days. Try to avoid flying on Sunday as fares are usually the highest.

£139
£112
£84
£57
    Cheapest
  • £109
    Mon
  • £100
    Tue
  • £87
    Wed
  • £84
    Thu
  • £116
    Fri
  • £106
    Sat
  • £139
    Sun

During the St Patrick's Day, which day is cheapest to fly from Phoenix to Seattle?

Data is based on the lowest one-way price from Phoenix to Seattle during St Patrick's Day in the Trip.com database over the past three days.

During the St Patrick's Day, flights from Phoenix to Seattle are cheapest on Mar 19, with the lowest price of £27.

£125
£76
£27
0
    Cheapest
  • £43
    Mar 13
  • £116
    Mar 14
  • £125
    Mar 15
  • £67
    Mar 16
  • £71
    Mar 17
  • £72
    Mar 18
  • £27
    Mar 19

Flight FAQs

  • Which airlines offer the cheapest flights from Phoenix (PHX) to Seattle (SEA)?

    Based on Trip.com data, Frontier Airlines offers one-way fares as low as £22 on Cheapest nonstop routes (e.g. PHX to SEA on Tue, Mar 31), while Frontier Airlines offers Cheapest nonstop round-trips from £43 departing on Thu, Mar 26 and returning on Mon, Mar 30.
  • At the moment, you can catch a direct flight from Phoenix to Seattle with the following airlines, including: Alaska Airlines Frontier Airlines Selected airlines are based on historical data collected from flight bookings users made on Trip.com within the last 90 days.
  • It takes about 3 hours 23 minutes to fly from Phoenix (PHX) to Seattle (SEA).
  • By analyzing data from all airlines on the Trip.com flight calendar, it looks like the best time to book a flight from Phoenix to Seattle is around 40 days (6 weeks) in advance, and the best time to fly is usually on Tuesday, Wednesday, and Saturday. Tuesday typically offers the cheapest flights for departure, while Saturday offers the best return deals.
  • Based on Trip.com data in the past 4 weeks, there is 94 flight per week flying from Phoenix to Seattle. You can check the weekly schedule for popular airlines on this route below: Alaska Airlines: S/M/T/W/T/F/S -- AS799 (07:15) Alaska Airlines: S/M/T/W/T/F/S -- AS645 (09:22)
  • To find best deals on flights from Phoenix to Seattle, you can use various tools on Trip.com:
    · Be flexible with your travel dates to get the cheapest flight deal. Now the cheapest flight deal is on Tue, Mar 31, with one-way flights priced at just £22.
    · Compare airlines strategically. Budget carriers often provide the lowest base fares, while we found the most affordable airline currently operating on this route is Frontier Airlines.
    · Set up price alerts to easily monitor ticket prices without having to check every day.
    · Check Trip.com flight deals and promo codes frequently.
    · Avoid peak season unless you book very early. It seems the peak season for Seattle travel is around July.
    · Get exclusive promo codes for Trip.com app users.
  • The cheapest months to fly from Phoenix to Seattle is November, when demand for travel is lower.
  • After crunching the numbers on our March flight calendar, it's currently cheapest to fly from Phoenix to Seattle on March 26, 2026 with Frontier Airlines, with prices starting at £21.
  • You can land at any one of the following hubs in Seattle, with Phoenix Sky Harbor International Airport to Seattle-Tacoma International Airport (PHX-SEA) is by far the most common option on this route: King County (Boeing Field) International Airport (BFI) Kenmore Air - Lake Union (LKE) Seattle-Tacoma International Airport (SEA).
  • The time difference between Seattle and Phoenix is 1h.
  • Tickets can only be changed or cancelled if permitted by airline policy. To submit a change or cancellation request, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and segment, and submit a request. Please note that additional charges may apply according to the airline ticket policy. However, if the flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For more details about change and cancellation policies, please check the customer support pages.

Trip.com airline insights on flights from Phoenix to Seattle

Which airlines offer the cheapest direct flights from Phoenix to Seattle?

Data is based on the past 12 months and reflects the average fare of all direct flights from Phoenix to Seattle on Trip.com.

Based on Trip.com data from the past 12 months, the airline offering the cheapest direct flights from Phoenix to Seattle is Frontier Airlines, with an average fare of £77.

£50
£77
£105
£133
£160
Frontier Airlines
£77
Frontier Airlines
Delta Air Lines
£114
Delta Air Lines
Hawaiian Airlines
£137
Hawaiian Airlines
Alaska Airlines
£158
Alaska Airlines
American Airlines
£160
American Airlines

Which airlines operate the most flights from Phoenix to Seattle?

The data is based on the past month and shows the number of flights each airline has from Phoenix to Seattle on Trip.com.

According to Trip.com data from the past month, the airline with the most flights from Phoenix to Seattle is Alaska Airlines/Hawaiian Airlines/Air Tahiti Nui, operating 67 flights per week.

13
31
49
67
Alaska Airlines
67
Alaska Airlines
Hawaiian Airlines
67
Hawaiian Airlines
Air Tahiti Nui
67
Air Tahiti Nui
Qatar Airways
53
Qatar Airways
Delta Air Lines
34
Delta Air Lines
American Airlines
31
American Airlines

How many flights fly from Phoenix to Seattle each day?

The data is based on the past month and shows the number of flights per day of the week from Phoenix to Seattle on Trip.com.

Based on Trip.com data from the past month, flights from Phoenix to Seattle are most frequent on Friday, while the fewest flights operate on Tuesday.

299
265
230
196
Highest
260
Mon
230
Tue
231
Wed
267
Thu
299
Fri
287
Sat
267
Sun