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Cheap flights from Phoenix Sky Harbor Intl Airport to Seattle from £54

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 14/3. Fares are subject to change and may not be available on all flights or dates of travel.
PHX — SEA
27 Feb — 6 Mar1
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 February or January, booked 62 days in advance, depart on a Wednesday or Friday and return on a Tuesday

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 28 January 2026.

Sat 28/208:15
PHX
-
SEA
1 stop5h 21m
Frontier
Fri 6/321:06
SEA
-
PHX
Nonstop2h 55m
Frontier
Deal found 26/1£74
Mon 2/308:15
PHX
-
SEA
1 stop12h 44m
Frontier
Fri 6/321:06
SEA
-
PHX
Nonstop2h 55m
Frontier
Deal found 26/1£83
Thu 12/317:49
PHX
-
SEA
Nonstop3h 14m
Frontier
Thu 19/322:08
SEA
-
PHX
Nonstop2h 57m
Frontier
Deal found 26/1£92
Sat 28/206:00
PHX
-
SEA
1 stop7h 01m
Frontier
Thu 5/309:28
SEA
-
PHX
1 stop13h 27m
Frontier
Deal found 26/1£99
Sun 1/306:45
PHX
-
SEA
Nonstop3h 13m
Frontier
Fri 6/321:06
SEA
-
PHX
Nonstop2h 55m
Frontier
Deal found 26/1£102
Mon 2/308:15
PHX
-
SEA
1 stop12h 44m
Frontier
Thu 5/309:28
SEA
-
PHX
1 stop13h 27m
Frontier
Deal found 26/1£105
Sat 28/322:25
PHX
-
SEA
Nonstop3h 00m
Southwest
Sun 29/319:55
SEA
-
PHX
Nonstop2h 50m
Southwest
Deal found 25/1£122

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 28 January 2026.

Round-trip from

£74

One-way from

£54

Popular in

December

Cheapest in

February

Average price

£122

Good one-way deal

£51 or less
Frontier
  • Frontier
  • 28/2-6/3
  • 1 total stop
  • 8h 16m total
  • Phoenix to Seattle
Search Deals
Southwest
  • Southwest
  • 14/3
  • Nonstop
  • 3h 00m total
  • Phoenix to Seattle
Search Deals
Highest demand for flights based on searches. 2% potential increase in price (£2 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 January 2026
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 28 January 2026.
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

Sat 28/3

22:25-01:25

Nonstop3h 00m

Seattle/Tacoma Intl

Sun 29/3

19:55-22:45

Nonstop2h 50m

£122

PhoenixSeattle

PHX - SEA

PHXSEA

Phoenix Sky Harbor Intl

Tue 14/4

06:00-09:13

Nonstop3h 13m

Seattle/Tacoma Intl

Tue 21/4

13:02-15:53

Nonstop2h 51m

£129

PhoenixSeattle

PHX - SEA

PHXSEA

Phoenix Sky Harbor Intl

Wed 22/4

15:50-19:05

Nonstop3h 15m

Seattle/Tacoma Intl

Wed 29/4

20:20-23:15

Nonstop2h 55m

£129

PhoenixSeattle

PHX - SEA

PHXSEA

Phoenix Sky Harbor Intl

Sat 6/6

19:52-23:05

Nonstop3h 13m

Seattle/Tacoma Intl

Sat 13/6

20:42-23:44

Nonstop3h 02m

£129

PhoenixSeattle

PHX - SEA

PHXSEA

Phoenix Sky Harbor Intl

Sat 20/6

17:35-20:50

Nonstop3h 15m

Seattle/Tacoma Intl

Wed 24/6

20:25-23:26

Nonstop3h 01m

£129

PhoenixSeattle

PHX - SEA

PHXSEA

Phoenix Sky Harbor Intl

Wed 1/7

08:45-11:59

Nonstop3h 14m

Seattle/Tacoma Intl

Sat 4/7

20:25-23:26

Nonstop3h 01m

£129

PhoenixSeattle

PHX - SEA

PHXSEA

Phoenix Sky Harbor Intl

Wed 18/3

06:00-09:13

Nonstop3h 13m

Seattle/Tacoma Intl

Tue 24/3

13:02-15:53

Nonstop2h 51m

£129

PhoenixSeattle

PHX - SEA

PHXSEA

Phoenix Sky Harbor Intl

Wed 22/4

06:15-09:31

Nonstop3h 16m

Seattle/Tacoma Intl

Sat 2/5

13:50-16:45

Nonstop2h 55m

£129

PhoenixSeattle

PHX - SEA

PHXSEA

Phoenix Sky Harbor Intl

Wed 27/5

17:35-20:50

Nonstop3h 15m

Seattle/Tacoma Intl

Wed 3/6

11:45-14:48

Nonstop3h 03m

£129

PhoenixSeattle

PHX - SEA

PHXSEA

Phoenix Sky Harbor Intl

Sat 6/6

17:35-20:50

Nonstop3h 15m

Seattle/Tacoma Intl

Sat 13/6

20:25-23:26

Nonstop3h 01m

£129

Flights are sorted by cheapest return flights first.

Deals found on 25/1

Showing 1-10 of 24 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 23 January 2026.

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 62 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, October is the cheapest month in which you can book a flight from Phoenix Sky Harbor Intl Airport to Seattle (average of £30). Flying from Phoenix Sky Harbor Intl Airport to Seattle in July is currently the most expensive (average of £65). 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 28 January 2026.

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 31 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, Alaska Airlines, and Delta 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 most reliable airlines from Phoenix Sky Harbor Intl Airport to Seattle?

    Consider Air France (98%), Korean Air (95%) or Virgin Atlantic (86%) 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 £51, our data shows the cheapest flight currently is £49. When looking at the most popular route, (Phoenix Sky Harbor Intl - Seattle/Tacoma Intl), you can expect to pay £130 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, October is the cheapest month in which you can book a flight from Phoenix Sky Harbor Intl Airport to Seattle (average of £30). Flying from Phoenix Sky Harbor Intl Airport to Seattle in July is currently the most expensive (average of £65). 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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Why should you use Cheapflights to find cheap flight tickets from Sky Harbor Intl to Seattle?

Millions of users choose and trust Cheapflights to book the best flight deals from Sky Harbor Intl to Seattle for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

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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