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Cheap flights from Phoenix Sky Harbor Intl Airport to Seattle from £41

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 14/12. Fares are subject to change and may not be available on all flights or dates of travel.
PHX — SEA
29 Nov — 6 Dec1
1 adult
1 adult, Economy, 0 bags

Cheapflights Tip: The best prices from Phoenix Sky Harbor Intl to Seattle/Tacoma Intl are usually found in January or February, booked 83 days in advance, depart on a Wednesday or Friday and return on a Monday

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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 30 October 2025.

Wed 19/1108:10PHX - SEA
1 stop4h 45mSouthwest
Mon 24/1105:15SEA - PHX
Nonstop2h 45mSouthwest
Deal found 27/10£77
Thu 18/1221:50PHX - SEA
Nonstop3h 15mSouthwest
Thu 8/108:45SEA - PHX
1 stop4h 50mSouthwest
Deal found 27/10£81
Thu 18/1221:50PHX - SEA
Nonstop3h 15mSouthwest
Fri 9/112:45SEA - PHX
2 stops6h 10mSouthwest
Deal found 28/10£85
Fri 12/1206:00PHX - SEA
1 stop5h 20mSouthwest
Mon 15/1212:35SEA - PHX
1 stop5h 55mSouthwest
Deal found 28/10£88
Thu 11/1207:00PHX - SEA
Nonstop3h 19mAlaska Airlines
Sun 14/1218:59SEA - PHX
Nonstop2h 52mAlaska Airlines
Deal found 29/10£88
Tue 25/1120:20PHX - SEA
1 stop6h 05mSouthwest
Tue 2/1206:15SEA - PHX
2 stops7h 25mSouthwest
Deal found 28/10£92
Sun 23/1107:00PHX - SEA
Nonstop3h 18mAlaska Airlines
Thu 4/1213:54SEA - PHX
Nonstop2h 55mAlaska Airlines
Deal found 29/10£104
Thu 11/1213:23PHX - SEA
Nonstop3h 16mAlaska Airlines
Thu 11/1218:59SEA - PHX
Nonstop2h 52mAlaska Airlines
Deal found 28/10£107
Wed 3/1206:00PHX - SEA
Nonstop3h 14mAlaska Airlines
Mon 8/1220:31SEA - PHX
1 stop17h 10mAlaska Airlines
Deal found 28/10£108
Wed 26/1106:00PHX - SEA
Nonstop3h 13mAlaska Airlines
Fri 28/1120:05SEA - PHX
Nonstop2h 54mAlaska Airlines
Deal found 28/10£111
Thu 20/1106:20PHX - SEA
Nonstop3h 14mAlaska Airlines
Mon 24/1116:59SEA - PHX
Nonstop2h 49mAlaska Airlines
Deal found 29/10£116
Sat 22/1106:00PHX - SEA
Nonstop3h 13mAlaska Airlines
Wed 10/1207:20SEA - PHX
1 stop6h 53mAlaska Airlines
Deal found 28/10£119

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 30 October 2025.

Round-trip from

£77

One-way from

£41

Popular in

March

Cheapest in

January

Average price

£141

Good one-way deal

£120 or less
Southwest
  • Southwest
  • 19/11-24/11
  • 1 total stop
  • 7h 30m total
  • Phoenix to Seattle
Search Deals
Southwest
  • Southwest
  • 14/12
  • 1 total stop
  • 5h 35m total
  • Phoenix to Seattle
Search Deals
Highest demand for flights based on searches. 4% potential increase in price (£4 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (£2 potential savings vs. average return price).
Search Deals
Average for round-trip flights in October 2025
Search Deals
Price to beat on a one-way flight from Phoenix Sky Harbor Intl to Seattle/Tacoma Intl.
Search Deals

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 30 October 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 23/12

22:45-00:55

Nonstop3h 10m

Seattle/Tacoma Intl

Tue 30/12

07:00-14:25

1 stop6h 25m

£81

PhoenixSeattle

PHX - SEA

PHXSEA

Phoenix Sky Harbor Intl

Thu 11/12

13:50-18:20

1 stop5h 30m

Seattle/Tacoma Intl

Sun 21/12

19:55-23:45

Nonstop2h 50m

£81

PhoenixSeattle

PHX - SEA

PHXSEA

Phoenix Sky Harbor Intl

Thu 15/1

16:55-22:50

1 stop6h 55m

Seattle/Tacoma Intl

Mon 19/1

05:00-08:45

Nonstop2h 45m

£81

PhoenixSeattle

PHX - SEA

PHXSEA

Phoenix Sky Harbor Intl

Thu 4/12

20:45-22:55

Nonstop3h 10m

Seattle/Tacoma Intl

Fri 5/12

05:40-14:10

2 stops7h 30m

£85

PhoenixSeattle

PHX - SEA

PHXSEA

Phoenix Sky Harbor Intl

Thu 18/12

21:50-00:05

Nonstop3h 15m

Seattle/Tacoma Intl

Thu 8/1

09:30-19:55

2 stops9h 25m

£85

PhoenixSeattle

PHX - SEA

PHXSEA

Phoenix Sky Harbor Intl

Thu 5/3

06:55-13:50

1 stop7h 55m

Seattle/Tacoma Intl

Sat 7/3

07:15-15:35

1 stop7h 20m

£88

PhoenixSeattle

PHX - SEA

PHXSEA

Phoenix Sky Harbor Intl

Mon 8/12

14:55-20:40

1 stop6h 45m

Seattle/Tacoma Intl

Thu 11/12

12:35-19:30

1 stop5h 55m

£88

PhoenixSeattle

PHX - SEA

PHXSEA

Phoenix Sky Harbor Intl

Wed 26/11

20:20-01:25

1 stop6h 05m

Seattle/Tacoma Intl

Tue 2/12

07:05-12:40

1 stop4h 35m

£88

PhoenixSeattle

PHX - SEA

PHXSEA

Phoenix Sky Harbor Intl

Fri 12/12

06:00-10:20

1 stop5h 20m

Seattle/Tacoma Intl

Sun 14/12

05:35-12:55

1 stop6h 20m

£88

PhoenixSeattle

PHX - SEA

PHXSEA

Phoenix Sky Harbor Intl

Thu 5/3

08:20-14:00

1 stop6h 40m

Seattle/Tacoma Intl

Wed 11/3

16:25-21:50

1 stop5h 25m

£88

Flights are sorted by cheapest return flights first.

Deals found on 28/10

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 24 October 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 83 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, February is the cheapest month in which you can book a flight from Phoenix Sky Harbor Intl Airport to Seattle (average of £29). Flying from Phoenix Sky Harbor Intl Airport to Seattle in July is currently the most expensive (average of £67). 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 30 October 2025.

Unlike in the afternoon, when flights are generally more expensive, you can save up to 83% on flights from Phoenix Sky Harbor Intl Airport to Seattle by exploring options for tickets in the morning.

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 27 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 Southwest fly from Phoenix Sky Harbor Intl Airport to Seattle in about 3h 10m. 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 most reliable airlines from Phoenix Sky Harbor Intl Airport to Seattle?

    Consider WestJet (95%), Frontier (91%) or Delta (90%) 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 £120, our data shows the cheapest flight currently is £22. When looking at the most popular route, (Phoenix Sky Harbor Intl - Seattle/Tacoma Intl), you can expect to pay £69 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, February is the cheapest month in which you can book a flight from Phoenix Sky Harbor Intl Airport to Seattle (average of £29). Flying from Phoenix Sky Harbor Intl Airport to Seattle in July is currently the most expensive (average of £67). 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

Travelling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
Tacoma
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Bothell
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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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