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$73+ Cheap flights from Sky Harbor Intl (PHX) to Seattle (SEA)

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 9/19. Fares are subject to change and may not be available on all flights or dates of travel.
PHX — SEA
Aug 2 — Aug 91
Sat 8/2
Sat 8/9
1 adult, Economy
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Cheapflights Tip: The best prices from Phoenix Sky Harbor Intl to Seattle/Tacoma Intl are usually found in January or September, booked 63 days in advance, depart on a Friday or Thursday and return on a Wednesday

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 July 28, 2025.

Round-trip from

$108
(FlightHub)

One-way from

$73
(Frontier)

Popular in

March

Cheapest in

January

Average price

$207

Good round-trip deal

$166 or less

Good one-way deal

$90 or less
From Phoenix Sky Harbor Intl to Seattle/Tacoma Intl
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One-way flight from Phoenix Sky Harbor Intl to Seattle/Tacoma Intl
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Highest demand for flights based on searches. 5% potential increase in price ($10 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($3 potential savings vs. average RT price).
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Average for round-trip flights in July 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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Price to beat on a one-way 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 July 28, 2025.

This FlightHub deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/166:48 amPHX - SEA
Nonstop3h 14mFrontier
Sat 8/1612:13 pmSEA - PHX
Nonstop3h 04mFrontier
Deal found 7/27$108
This Kiwi.com deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/132:21 pmPHX - SEA
Nonstop3h 17mMultiple Airlines
Wed 10/159:51 amSEA - PHX
Nonstop3h 00mMultiple Airlines
Deal found 7/26$136
This Alaska Airlines deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/207:00 amPHX - SEA
Nonstop3h 07mAlaska Airlines
Wed 8/201:30 pmSEA - PHX
1 stop5h 47mAlaska Airlines
Deal found 7/27$151
This iWofly deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure iWofly is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/207:00 amPHX - SEA
Nonstop3h 07mHawaiian Airlines
Thu 8/214:10 pmSEA - PHX
Nonstop3h 00mHawaiian Airlines
Deal found 7/27$153
This Delta deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/311:05 amPHX - SEA
Nonstop3h 09mDelta
Wed 9/107:30 pmSEA - PHX
Nonstop3h 01mDelta
Deal found 7/28$159

Cheapflights Fare Finder

 
Customize 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 2,558,603 searches. Data last updated July 28, 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

Sat 8/16

6:48 am-10:02 am

Nonstop3h 14m

Seattle/Tacoma Intl

Sat 8/16

12:13 pm-3:17 pm

Nonstop3h 04m

$108

PhoenixSeattle

PHX - SEA

PHXSEA

Phoenix Sky Harbor Intl

Mon 10/13

2:21 pm-5:38 pm

Nonstop3h 17m

Seattle/Tacoma Intl

Wed 10/15

9:51 am-12:51 pm

Nonstop3h 00m

$136

PhoenixSeattle

PHX - SEA

PHXSEA

Phoenix Sky Harbor Intl

Wed 8/20

7:00 am-10:07 am

Nonstop3h 07m

Seattle/Tacoma Intl

Wed 8/20

1:30 pm-7:17 pm

1 stop5h 47m

$151

PhoenixSeattle

PHX - SEA

PHXSEA

Phoenix Sky Harbor Intl

Wed 8/20

7:00 am-10:07 am

Nonstop3h 07m

Seattle/Tacoma Intl

Thu 8/21

4:10 pm-7:10 pm

Nonstop3h 00m

$153

PhoenixSeattle

PHX - SEA

PHXSEA

Phoenix Sky Harbor Intl

Wed 9/3

11:05 am-2:14 pm

Nonstop3h 09m

Seattle/Tacoma Intl

Wed 9/10

7:30 pm-10:31 pm

Nonstop3h 01m

$159

PhoenixSeattle

PHX - SEA

PHXSEA

Phoenix Sky Harbor Intl

Fri 9/19

6:05 am-9:20 am

Nonstop3h 15m

$73

PhoenixSeattle

PHX - SEA

PHXSEA

Phoenix Sky Harbor Intl

Wed 9/10

7:15 am-10:26 am

Nonstop3h 11m

$79

PhoenixSeattle

PHX - SEA

PHXSEA

Phoenix Sky Harbor Intl

Tue 9/30

12:00 pm-3:07 pm

Nonstop3h 07m

$80

PhoenixSeattle

PHX - SEA

PHXSEA

Phoenix Sky Harbor Intl

Wed 8/20

7:15 pm-10:22 pm

Nonstop3h 07m

$84

PhoenixSeattle

PHX - SEA

PHXSEA

Phoenix Sky Harbor Intl

Wed 9/3

3:41 pm-8:54 pm

1 stop5h 13m

$85

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/26

Showing 1-10 of 12 results
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The best insider tips for Phoenix Sky Harbor Intl Airport to Seattle flights

Snippets provided in this section are AI-generated based on a summarization of Cheapflights-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
Cheapflights partnered with top experts to bring you the best recommendations for your Phoenix Sky Harbor Intl Airport to Seattle trip
Airlines
Korean Air

Korean Air's economy seats offer 33”-34” pitch, providing more space than many competitors.


Korean Air allows two checked bags up to 50 lbs each for economy passengers.

Read more about Korean Airby Yulia Denisyuk
Frontier

Frontier offers extra comfort seats with 32” separation for added legroom on short flights.


Early check-in helps avoid overbooking issues and secures your seat on Frontier flights.

Read more about Frontierby Marisa Garcia
Alaska Airlines

Alaska Airlines offers Wi-Fi for a flat fee, ideal for business travelers on short routes.


Alaska's Premium Class offers extra legroom and free cocktails, enhancing comfort on short flights.

Read more about Alaska Airlinesby Robert Schrader
Airports
PHX

PHX security lines are short, often under 10 minutes. Check live wait times online for the quickest lane.

Read more about PHXby Brandon Schultz
SEA

Take the Link light rail from SEA to downtown Seattle for a cost-effective, 40-minute journey.

Read more about SEAby Brandon Schultz
Our travel experts
Yulia Denisyuk

Yulia Denisyuk

Expert on Korean Air

Yulia Denisyuk

Yulia Denisyuk

Yulia is a freelance journalist who’s dispatched from 90+ countries. Her work focuses on cultures, adventure trips and air travel, appearing in NatGeo, NYT, CNTraveler, and more. For past assignments, she’s stayed with nomads in Mongolia and learned the art of Imigongo in Rwanda. She’s based in Chicago; in winter she often questions that decision.

Read more
Marisa Garcia

Marisa Garcia

Expert on Frontier

Marisa Garcia

Marisa Garcia

Marisa knows planes inside and out, spending 16 years working on aircraft in hangars at airports around the world. She is an aviation industry expert, specialized in airline interiors and regulations. Ten years ago, she pivoted to journalism. She shares her insights in leading aviation, travel, and business publications and on her site FlightChic.

Read more
Robert Schrader

Robert Schrader

Expert on Alaska Airlines

Robert Schrader

Robert Schrader

One of the web's original travel bloggers, Robert launched his first site Leave Your Daily Hell in 2009. Since then, he's expanded into destination niche sites (one each for Japan, Thailand and Taiwan), in addition to having written for the inflight magazines of Singapore Airlines and Korean Air. Overall, he's visited nearly 100 countries, and flies business as often as possible.

Read more
Brandon Schultz

Brandon Schultz

Expert on PHX and SEA

Brandon Schultz

Brandon Schultz

Brandon Schultz is an award-winning food and travel writer based in New York City. His work has appeared in Forbes, AAA, Thrillist, Travel + Leisure, and The Daily Meal, among many others, and he is the author of 6 books, including 3 cookbooks.

Read more

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 round-trip 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 round-trip flight from Sky Harbor Intl to Seattle. Price data was last updated on July 25, 2025.

The best time to book flights from Phoenix Sky Harbor Intl Airport to Seattle is 63 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

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 $238). Flying from Phoenix Sky Harbor Intl Airport to Seattle in June is currently the most expensive (average of $389). 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 July 28, 2025.

It’s typically best to fly out from Phoenix Sky Harbor Intl Airport to Seattle at noon. Doing so could potentially save you 42% on the flight price compared to flying in the evening, which is usually more expensive.

What is the cheapest day to fly from Phoenix Sky Harbor Intl Airport to Seattle?

Use this chart to determine the cheapest time to fly round-trip from Sky Harbor Intl to Seattle. Price data was last updated on July 27, 2025.

Travelers seeking maximum savings on their Phoenix Sky Harbor Intl Airport to Seattle flight should consider departing on Friday at noon when fares are most often at their lowest. Monday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from Phoenix Sky Harbor Intl Airport to Seattle

Explore weekly flight availability from Sky Harbor Intl to Seattle. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated July 28, 2025.

The most flights from PHX to SEA are scheduled on a Monday (61 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (40 on average).

Reviews of airlines servicing Seattle

Get insights into the airlines that provide service to Seattle. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Seattle. Reviews last updated July 28, 2025.
Read reviews from past customers who have flown Alaska Airlines, Southwest, and Delta from Phoenix Sky Harbor Intl Airport to Seattle. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Boarding

8.1

Entertainment

7.1

Food

7.1

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

EUG - SEA

Mobility support was fabulous No flight entertainment that I was aware of.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Boarding

8.1

Entertainment

7.1

Food

7.1

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

EUG - SEA

Mobility support was fabulous No flight entertainment that I was aware of.
Southwest
8.0
Very good
4,237 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Boarding

8.1

Entertainment

7.1

Food

7.1

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

EUG - SEA

Mobility support was fabulous No flight entertainment that I was aware of.
Delta
8.0
Very good
7,971 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Boarding

8.1

Entertainment

7.1

Food

7.1

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

EUG - SEA

Mobility support was fabulous No flight entertainment that I was aware of.
Hawaiian Airlines
7.8
Good
2,604 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Boarding

8.1

Entertainment

7.1

Food

7.1

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

EUG - SEA

Mobility support was fabulous No flight entertainment that I was aware of.
United Airlines
7.4
Good
8,893 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Boarding

8.1

Entertainment

7.1

Food

7.1

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

EUG - SEA

Mobility support was fabulous No flight entertainment that I was aware of.

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?

    Seattle/Tacoma Intl (SEA), located 11.4 mi from the city center, is the airport you fly into when you book flights from Phoenix Sky Harbor Intl to Seattle. 7 airlines have flights to Seattle/Tacoma Intl from Phoenix Sky Harbor Intl on a regular basis. Booking flights from Phoenix Sky Harbor Intl to Seattle/Tacoma Intl should not be difficult; the airport handles an average of 52 inbound flights from Phoenix Sky Harbor Intl per day.

  • What are the cheapest airlines flying from Phoenix Sky Harbor Intl Airport to Seattle round-trip?

    Cheapflights users have booked flights from Phoenix Sky Harbor Intl Airport to Seattle round-trip from $108. Other airlines that can offer you cheap pricing are Alaska Airlines, from $151, and Hawaiian Airlines, from $153. These flights start at 42% lower than the current average price 3 months from now.

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

    For one-way options, check prices for Frontier. According to our data, you can fly for as low as $73. Users have also found prices from $79 and $80 on American Airlines and Hawaiian Airlines, respectively.

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

    Consider Condor (94%), Finnair (91%) or Delta (89%) 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?

    Looking at all options, your cheapest flight can be booked for $57. While the most popular route (Phoenix Sky Harbor Intl - Seattle/Tacoma Intl) can be booked for $126 on average our data indicates $1,549 when flying from Phoenix Sky Harbor Intl Airport to Seattle.

  • 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 vacation 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 $238). Flying from Phoenix Sky Harbor Intl Airport to Seattle in June is currently the most expensive (average of $389). 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

Traveling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
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Top 7 airlines flying from Sky Harbor Intl to Seattle

Discover the top 7 airlines that operate flights from Sky Harbor Intl to Seattle. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$52Average$150FlexibilityNo cancel feeOn-time62%
Hawaiian AirlinesCheapest$88Average$199FlexibilityNo cancel feeOn-time85%
Spirit AirlinesCheapest$95Average$158FlexibilityNo cancel feeOn-time65%
DeltaCheapest$97Average$197FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$112Average$198FlexibilityNo cancel feeOn-time63%
Alaska AirlinesCheapest$125Average$218FlexibilityNo cancel feeOn-time75%
American AirlinesCheapest$143Average$290FlexibilityNo cancel feeOn-time71%

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