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Cheap flights from Phoenix Sky Harbor Intl Airport to Seattle from £59

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 13/11. Fares are subject to change and may not be available on all flights or dates of travel.
PHX — SEA
12 Oct — 19 Oct1
1 adult
1 adult, Economy

Cheapflights Tip: The best prices from Phoenix Sky Harbor Intl to Seattle/Tacoma Intl are usually found in January or October, booked 63 days in advance, depart on a Wednesday or Friday and return on a Tuesday

Cheap flight deals from Sky Harbor Intl to Seattle

Discover tips and strategies to find the most affordable flight options for your journey from Sky Harbor Intl (PHX) to Seattle (SEA). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 12 September 2025.

Round-trip from

£78

One-way from

£59

Popular in

March

Cheapest in

January

Average price

£123

Good round-trip deal

£148 or less
Delta
  • Delta
  • 14/10-21/10
  • Nonstop
  • 6h 12m total
  • Phoenix to Seattle
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Southwest
  • Southwest
  • 15/12
  • 1 total stop
  • 5h 30m total
  • Phoenix to Seattle
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Highest demand for flights based on searches. 4% potential increase in price (£4 potential increase over avg. return price).
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Cheapest flight prices on average. 1% potential price decrease (£2 potential savings vs. average return price).
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Average for round-trip flights in September 2025
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Price to beat on a round-trip flight from Phoenix Sky Harbor Intl to Seattle/Tacoma Intl.
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Find flight deals from Sky Harbor Intl to Seattle

Cheapest flights from Sky Harbor Intl to Seattle
Explore the most affordable flight options available from Sky Harbor Intl to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 12 September 2025.

Tue 14/1007:05PHX - SEA
Nonstop3h 15mDelta
Tue 21/1009:55SEA - PHX
Nonstop2h 57mDelta
Deal found 12/9£78
Tue 7/1013:45PHX - SEA
Nonstop3h 11mDelta
Tue 14/1007:10SEA - PHX
Nonstop2h 56mDelta
Deal found 10/9£79
Wed 19/1108:10PHX - SEA
1 stop4h 45mSouthwest
Wed 3/1205:15SEA - PHX
Nonstop2h 45mSouthwest
Deal found 10/9£81
Wed 22/1020:00PHX - SEA
Nonstop3h 00mSouthwest
Sat 25/1018:15SEA - PHX
Nonstop2h 55mSouthwest
Deal found 10/9£83
Tue 14/1020:00PHX - SEA
Nonstop3h 00mSouthwest
Tue 21/1013:20SEA - PHX
1 stop7h 05mSouthwest
Deal found 11/9£85
Tue 7/1020:00PHX - SEA
Nonstop3h 00mSouthwest
Tue 14/1016:40SEA - PHX
1 stop4h 35mSouthwest
Deal found 9/9£86
Sat 18/1019:30PHX - SEA
Nonstop3h 00mSouthwest
Sat 25/1018:15SEA - PHX
Nonstop2h 55mSouthwest
Deal found 9/9£89
Tue 7/1017:55PHX - SEA
1 stop4h 50mSouthwest
Tue 21/1013:20SEA - PHX
1 stop7h 05mSouthwest
Deal found 9/9£93
Wed 15/1011:01PHX - SEA
Nonstop3h 19mDelta
Sat 25/1015:20SEA - PHX
Nonstop2h 48mDelta
Deal found 12/9£94
Thu 2/1019:10PHX - SEA
Nonstop3h 14mDelta
Tue 7/1009:55SEA - PHX
Nonstop2h 57mDelta
Deal found 12/9£95

Cheapflights Fare Finder

 
Customise your flight search to find flights from Sky Harbor Intl to Seattle that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 12 September 2025.
Use the filters below to find and compare flights from Phoenix Sky Harbor Intl Airport to Seattle that are best for you.

Fly from

Sky Harbor Intl

Fly to

Seattle

Route

Depart

Return

Price

PhoenixSeattle

PHX - SEA

PHXSEA

Phoenix Sky Harbor Intl

Tue 21/10

13:45-16:56

Nonstop3h 11m

Seattle/Tacoma Intl

Tue 4/11

19:30-23:21

Nonstop2h 51m

£78

PhoenixSeattle

PHX - SEA

PHXSEA

Phoenix Sky Harbor Intl

Wed 12/11

14:45-17:00

Nonstop3h 15m

Seattle/Tacoma Intl

Wed 19/11

19:50-23:47

Nonstop2h 57m

£78

PhoenixSeattle

PHX - SEA

PHXSEA

Phoenix Sky Harbor Intl

Tue 21/10

13:45-16:56

Nonstop3h 11m

Seattle/Tacoma Intl

Tue 28/10

07:10-10:06

Nonstop2h 56m

£78

PhoenixSeattle

PHX - SEA

PHXSEA

Phoenix Sky Harbor Intl

Tue 21/10

20:00-23:00

Nonstop3h 00m

Seattle/Tacoma Intl

Tue 4/11

12:35-19:30

1 stop5h 55m

£85

PhoenixSeattle

PHX - SEA

PHXSEA

Phoenix Sky Harbor Intl

Thu 16/10

18:00-21:10

Nonstop3h 10m

Seattle/Tacoma Intl

Tue 21/10

07:05-10:05

Nonstop3h 00m

£94

PhoenixSeattle

PHX - SEA

PHXSEA

Phoenix Sky Harbor Intl

Fri 7/11

14:45-16:58

Nonstop3h 13m

Seattle/Tacoma Intl

Tue 11/11

15:18-19:07

Nonstop2h 49m

£94

PhoenixSeattle

PHX - SEA

PHXSEA

Phoenix Sky Harbor Intl

Sat 1/11

07:05-10:20

Nonstop3h 15m

Seattle/Tacoma Intl

Wed 12/11

07:10-11:07

Nonstop2h 57m

£94

PhoenixSeattle

PHX - SEA

PHXSEA

Phoenix Sky Harbor Intl

Thu 2/10

05:30-08:38

Nonstop3h 08m

Seattle/Tacoma Intl

Tue 7/10

15:20-18:08

Nonstop2h 48m

£95

PhoenixSeattle

PHX - SEA

PHXSEA

Phoenix Sky Harbor Intl

Fri 3/10

15:46-18:52

Nonstop3h 06m

Seattle/Tacoma Intl

Tue 7/10

09:55-12:52

Nonstop2h 57m

£97

PhoenixSeattle

PHX - SEA

PHXSEA

Phoenix Sky Harbor Intl

Wed 5/11

06:20-08:34

Nonstop3h 14m

Seattle/Tacoma Intl

Sun 9/11

07:00-10:55

Nonstop2h 55m

£99

Flights are sorted by cheapest return flights first.

Deals found on 9/9

Showing 1-10 of 23 results
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Best time to book a flight from Sky Harbor Intl to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from Sky Harbor Intl with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Phoenix Sky Harbor Intl Airport to Seattle

How far ahead should I book a flight from Phoenix Sky Harbor Intl Airport to Seattle?

Use this chart to determine the optimal time to book a return flight from Sky Harbor Intl to Seattle. Price data was last updated on 29 August 2025.

The price you pay for your flight from Phoenix Sky Harbor Intl Airport to Seattle may vary depending on when you book. For the best chance of a lower fare, look to book 63 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

What is the cheapest month to book a flight from Phoenix Sky Harbor Intl Airport to Seattle?

Currently, January is the cheapest month in which you can book a flight from Phoenix Sky Harbor Intl Airport to Seattle (average of £622). Flying from Phoenix Sky Harbor Intl Airport to Seattle in July is currently the most expensive (average of £946). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from PHX to SEA?

Find hourly flight availability from Sky Harbor Intl to Seattle. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 12 September 2025.

Unlike in the afternoon, when flights are generally more expensive, you can save up to 84% on flights from Phoenix Sky Harbor Intl Airport to Seattle by exploring options for tickets in the morning.

How much does it cost for a return flight from Phoenix Sky Harbor Intl Airport to Seattle?

Related info for your journey

Find useful and relevant information for your journey from Sky Harbor Intl to Seattle. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Seattle from Phoenix Sky Harbor Intl?

    For a flight from Phoenix Sky Harbor Intl to Seattle, you will be flying into Seattle/Tacoma Intl. Seattle/Tacoma Intl (SEA) is just 11.4 mi from the center of the city. Seattle/Tacoma Intl is the only Seattle airport and it handles 38 inbound flights from Phoenix Sky Harbor Intl per day. 0 airlines have flights to Seattle/Tacoma Intl from Phoenix Sky Harbor Intl on a regular basis.

  • How long is the flight from Phoenix Sky Harbor Intl Airport to Seattle?

    Airlines like Delta and Southwest fly from Phoenix Sky Harbor Intl Airport to Seattle in about 3h. The time it takes to get you to your destination is usually consistent. Phoenix Sky Harbor Intl Airport and Seattle are separated by a distance of 1107 mi. Generally, flights for this route are direct.

  • What are the cheapest airlines to fly from Phoenix Sky Harbor Intl Airport to Seattle one-way?

    The cheapet airlines for a one-way flight from Phoenix Sky Harbor Intl Airport to Seattle are Southwest (£59), Alaska Airlines (£61), and Hawaiian Airlines (£61).

  • What are the most reliable airlines from Phoenix Sky Harbor Intl Airport to Seattle?

    Consider WestJet (93%), Condor (92%) or Frontier (92%) when booking your flight. These represent the most reliable airlines when flying from Phoenix Sky Harbor Intl Airport to Seattle.

  • What are the cheapest flights from Phoenix Sky Harbor Intl Airport to Seattle?

    While on average a flight from Phoenix Sky Harbor Intl Airport to Seattle is generally £238, our data shows the cheapest flight currently is £148. When looking at the most popular route, (Phoenix Sky Harbor Intl - Seattle/Tacoma Intl), you can expect to pay £117 for that flight.

  • Can I find deals for flights from Sky Harbor Intl to Seattle that include hotel bookings?

    Yes. In addition to deals on Sky Harbor Intl to Seattle flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Sky Harbor Intl to Seattle?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Sky Harbor Intl to Seattle.

  • Can I find deals for business class flights from Sky Harbor Intl to Seattle?

    Yes. Cheapflights offers flight deals from Sky Harbor Intl to Seattle by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Phoenix Sky Harbor Intl Airport to Seattle?

    Currently, January is the cheapest month in which you can book a flight from Phoenix Sky Harbor Intl Airport to Seattle (average of £622). Flying from Phoenix Sky Harbor Intl Airport to Seattle in July is currently the most expensive (average of £946). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Can Cheapflights find flights from Sky Harbor Intl to Seattle with no change fees?

Yes, we can. To see specific flights from Sky Harbor Intl to Seattle with no change fees, users can toggle flexible booking options after using the search form above to find flights.

Can Cheapflights notify me if prices for flights from Sky Harbor Intl to Seattle become cheaper?

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Seattle from Sky Harbor Intl today and book when prices fit your budget.

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