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Cheap flights from Phoenix Sky Harbor Intl Airport to Seattle from £37

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 10/1. Fares are subject to change and may not be available on all flights or dates of travel.
PHX — SEA
13 Jan — 20 Jan1
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 89 days in advance, depart on a Wednesday or Friday and return on a Monday

Cheap flight deals from Sky Harbor Intl to Seattle

Enter your travel dates to find the best prices.

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 14 December 2025.

Thu 25/1206:06PHX - SEA
Nonstop3h 19mAlaska Airlines
Thu 29/118:54SEA - PHX
Nonstop2h 52mAlaska Airlines
Deal found 13/12£110
Thu 25/1206:06PHX - SEA
Nonstop3h 19mAlaska Airlines
Fri 2/118:24SEA - PHX
Nonstop2h 54mAlaska Airlines
Deal found 12/12£114
Thu 25/1207:00PHX - SEA
Nonstop3h 19mAlaska Airlines
Wed 31/1218:24SEA - PHX
Nonstop2h 54mAlaska Airlines
Deal found 13/12£137
Thu 25/1206:06PHX - SEA
Nonstop3h 19mAlaska Airlines
Thu 1/118:24SEA - PHX
Nonstop2h 54mAlaska Airlines
Deal found 11/12£140
Thu 25/1206:19PHX - SEA
Nonstop3h 21mDelta
Thu 1/109:42SEA - PHX
Nonstop2h 59mDelta
Deal found 12/12£162
Wed 24/1206:06PHX - SEA
Nonstop3h 19mAlaska Airlines
Sun 4/115:45SEA - PHX
Nonstop2h 54mAlaska Airlines
Deal found 12/12£170
Sun 21/1206:06PHX - SEA
Nonstop3h 19mAlaska Airlines
Sun 4/106:35SEA - PHX
Nonstop2h 49mAlaska Airlines
Deal found 11/12£181
Thu 25/1217:40PHX - SEA
1 stop6h 32mUnited Airlines
Wed 31/1213:35SEA - PHX
1 stop7h 22mUnited Airlines
Deal found 13/12£185
Fri 26/1206:06PHX - SEA
Nonstop3h 19mAlaska Airlines
Sun 4/106:35SEA - PHX
Nonstop2h 49mAlaska Airlines
Deal found 12/12£185
Sat 27/1206:06PHX - SEA
Nonstop3h 19mAlaska Airlines
Wed 31/1218:24SEA - PHX
Nonstop2h 54mAlaska Airlines
Deal found 12/12£186
Wed 31/1206:06PHX - SEA
Nonstop3h 19mAlaska Airlines
Sun 4/117:05SEA - PHX
Nonstop2h 54mAlaska Airlines
Deal found 12/12£189

Find 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 14 December 2025.

Round-trip from

£73

One-way from

£37

Popular in

December

Cheapest in

January

Average price

£162

Good one-way deal

£74 or less
Delta
  • Delta
  • 12/1-14/1
  • Nonstop
  • 6h 15m total
  • Phoenix to Seattle
Search Deals
Delta
  • Delta
  • 29/1
  • Nonstop
  • 3h 16m total
  • Phoenix to Seattle
Search Deals
High demand for flights, 2% potential price rise
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£2 potential savings vs. average return price).
Search Deals
Average for round-trip flights in December 2025
Search Deals
Price to beat on a one-way flight from Phoenix Sky Harbor Intl to Seattle/Tacoma Intl.
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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 14 December 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

Fri 30/1

06:20-08:40

Nonstop3h 20m

Seattle/Tacoma Intl

Mon 2/2

09:55-13:50

Nonstop2h 55m

£73

PhoenixSeattle

PHX - SEA

PHXSEA

Phoenix Sky Harbor Intl

Tue 20/1

19:35-21:53

Nonstop3h 18m

Seattle/Tacoma Intl

Tue 27/1

10:18-14:14

Nonstop2h 56m

£73

PhoenixSeattle

PHX - SEA

PHXSEA

Phoenix Sky Harbor Intl

Wed 14/1

18:31-20:49

Nonstop3h 18m

Seattle/Tacoma Intl

Sun 18/1

07:10-11:08

Nonstop2h 58m

£73

PhoenixSeattle

PHX - SEA

PHXSEA

Phoenix Sky Harbor Intl

Wed 7/1

18:31-20:49

Nonstop3h 18m

Seattle/Tacoma Intl

Sun 11/1

07:10-11:08

Nonstop2h 58m

£87

PhoenixSeattle

PHX - SEA

PHXSEA

Phoenix Sky Harbor Intl

Sat 10/1

06:20-08:40

Nonstop3h 20m

Seattle/Tacoma Intl

Mon 12/1

07:10-11:08

Nonstop2h 58m

£87

PhoenixSeattle

PHX - SEA

PHXSEA

Phoenix Sky Harbor Intl

Fri 23/1

19:59-22:17

Nonstop3h 18m

Seattle/Tacoma Intl

Sun 25/1

15:17-19:04

Nonstop2h 47m

£87

PhoenixSeattle

PHX - SEA

PHXSEA

Phoenix Sky Harbor Intl

Fri 23/1

16:42-18:55

Nonstop3h 13m

Seattle/Tacoma Intl

Mon 26/1

07:10-11:08

Nonstop2h 58m

£87

PhoenixSeattle

PHX - SEA

PHXSEA

Phoenix Sky Harbor Intl

Sun 25/1

05:50-10:25

1 stop5h 35m

Seattle/Tacoma Intl

Thu 29/1

13:20-17:10

Nonstop2h 50m

£110

PhoenixSeattle

PHX - SEA

PHXSEA

Phoenix Sky Harbor Intl

Mon 9/3

22:40-01:40

Nonstop3h 00m

Seattle/Tacoma Intl

Fri 13/3

18:00-20:50

Nonstop2h 50m

£110

PhoenixSeattle

PHX - SEA

PHXSEA

Phoenix Sky Harbor Intl

Thu 19/3

08:40-11:57

Nonstop3h 17m

Seattle/Tacoma Intl

Mon 23/3

18:48-21:34

Nonstop2h 46m

£110

Flights are sorted by cheapest return flights first.

Deals found on 11/12

Showing 1-10 of 22 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 12 December 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 89 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 £28). Flying from Phoenix Sky Harbor Intl Airport to Seattle in July is currently the most expensive (average of £66). 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 14 December 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 40 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 Alaska Airlines fly from Phoenix Sky Harbor Intl Airport to Seattle in about 3h 16m. 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 (89%), Korean Air (89%) or Air France (88%) 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 £154, our data shows the cheapest flight currently is £74. When looking at the most popular route, (Phoenix Sky Harbor Intl - Seattle/Tacoma Intl), you can expect to pay £65 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 £28). Flying from Phoenix Sky Harbor Intl Airport to Seattle in July is currently the most expensive (average of £66). 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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