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$58+ 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 11/4. Fares are subject to change and may not be available on all flights or dates of travel.
PHX — SEA
jun. 17 — jun. 241
mar. 6/17
mar. 6/24
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 85 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 junio 12, 2025.

Round-trip from

$103
(American Airlines)

One-way from

$58
(Southwest)

Popular in

March

Cheapest in

January

Average price

$198

Good round-trip deal

$180 or less

Good one-way deal

$96 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 ($2 potential savings vs. average RT price).
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Average for round-trip flights in June 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 junio 12, 2025.

This Hawaiian Airlines deal was found by Cheapflights users on 6/10. 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 11/126:20 amPHX - SEA
Nonstop3h 14mHawaiian Airlines
lun. 11/173:59 pmSEA - PHX
Nonstop2h 51mHawaiian Airlines
Deal found 6/10$102
This American Airlines deal was found by Cheapflights users on 6/10. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 8/207:15 amPHX - SEA
Nonstop3h 10mAmerican Airlines
jue. 8/215:20 pmSEA - PHX
Nonstop3h 03mAmerican Airlines
Deal found 6/10$103
This Southwest deal was found by Cheapflights users on 6/10. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 8/203:20 pmPHX - SEA
1 stop7h 30mSouthwest
mié. 8/2711:50 amSEA - PHX
Nonstop3h 00mSouthwest
Deal found 6/10$107
This Alaska Airlines deal was found by Cheapflights users on 6/10. 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.
jue. 8/71:55 pmPHX - SEA
Nonstop3h 05mAlaska Airlines
mar. 8/123:59 pmSEA - PHX
Nonstop2h 58mAlaska Airlines
Deal found 6/10$115
This Kiwi.com deal was found by Cheapflights users on 6/12. 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.
mié. 6/258:17 amPHX - SEA
Nonstop3h 14mFrontier
mié. 7/212:18 pmSEA - PHX
Nonstop3h 00mFrontier
Deal found 6/12$137
This Trip.com deal was found by Cheapflights users on 6/11. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 7/266:48 amPHX - SEA
Nonstop3h 14mMultiple Airlines
sáb. 8/211:44 amSEA - PHX
Nonstop3h 03mMultiple Airlines
Deal found 6/11$153
This Delta deal was found by Cheapflights users on 6/10. 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.
mié. 7/161:25 pmPHX - SEA
Nonstop3h 03mDelta
mar. 7/227:20 amSEA - PHX
Nonstop2h 56mDelta
Deal found 6/10$159
This United Airlines deal was found by Cheapflights users on 6/10. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 8/74:13 pmPHX - SEA
1 stop6h 03mUnited Airlines
mar. 8/125:10 amSEA - PHX
1 stop5h 38mUnited Airlines
Deal found 6/10$207

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 junio 12, 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

mié. 11/12

6:20 am-8:34 am

Nonstop3h 14m

Seattle/Tacoma Intl

lun. 11/17

3:59 pm-7:50 pm

Nonstop2h 51m

$102

PhoenixSeattle

PHX - SEA

PHXSEA

Phoenix Sky Harbor Intl

mié. 8/20

7:15 am-10:25 am

Nonstop3h 10m

Seattle/Tacoma Intl

jue. 8/21

5:20 pm-8:23 pm

Nonstop3h 03m

$103

PhoenixSeattle

PHX - SEA

PHXSEA

Phoenix Sky Harbor Intl

mié. 8/20

3:20 pm-10:50 pm

1 stop7h 30m

Seattle/Tacoma Intl

mié. 8/27

11:50 am-2:50 pm

Nonstop3h 00m

$107

PhoenixSeattle

PHX - SEA

PHXSEA

Phoenix Sky Harbor Intl

jue. 8/7

1:55 pm-5:00 pm

Nonstop3h 05m

Seattle/Tacoma Intl

mar. 8/12

3:59 pm-6:57 pm

Nonstop2h 58m

$115

PhoenixSeattle

PHX - SEA

PHXSEA

Phoenix Sky Harbor Intl

mié. 6/25

8:17 am-11:31 am

Nonstop3h 14m

Seattle/Tacoma Intl

mié. 7/2

12:18 pm-3:18 pm

Nonstop3h 00m

$137

PhoenixSeattle

PHX - SEA

PHXSEA

Phoenix Sky Harbor Intl

sáb. 7/26

6:48 am-10:02 am

Nonstop3h 14m

Seattle/Tacoma Intl

sáb. 8/2

11:44 am-2:47 pm

Nonstop3h 03m

$153

PhoenixSeattle

PHX - SEA

PHXSEA

Phoenix Sky Harbor Intl

mié. 7/16

1:25 pm-4:28 pm

Nonstop3h 03m

Seattle/Tacoma Intl

mar. 7/22

7:20 am-10:16 am

Nonstop2h 56m

$159

PhoenixSeattle

PHX - SEA

PHXSEA

Phoenix Sky Harbor Intl

jue. 8/7

6:00 am-1:46 pm

1 stop7h 46m

Seattle/Tacoma Intl

lun. 8/11

5:10 am-10:48 am

1 stop5h 38m

$207

PhoenixSeattle

PHX - SEA

PHXSEA

Phoenix Sky Harbor Intl

dom. 6/22

12:54 pm-3:03 pm

1 stop26h 09m

Seattle/Tacoma Intl

dom. 6/29

3:58 pm-11:49 am

1 stop19h 51m

$260

PhoenixSeattle

PHX - SEA

PHXSEA

Phoenix Sky Harbor Intl

mar. 11/4

7:05 am-11:35 am

1 stop5h 30m

$58

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/9

Showing 1-10 of 18 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 June 9, 2025.

The best time to book flights from Phoenix Sky Harbor Intl Airport to Seattle is 85 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 July is currently the most expensive (average of $391). 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 junio 12, 2025.

It’s typically best to fly out from Phoenix Sky Harbor Intl Airport to Seattle in the afternoon. Doing so could potentially save you 39% 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 June 8, 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. Wednesday 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 junio 12, 2025.

The most flights from PHX to SEA are scheduled on a Thursday (58 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (27 on average).

Rainfall in Seattle by month

Plan your trip to Seattle by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Seattle ranges from 0.7 - 6.6 inches per month. November is typically the wettest month, when rainfall can reach 6.6 in. July is typically the driest time to visit Seattle when rainfall is around 0.7 in.

Temperature in Seattle by month

Plan your trip to Seattle by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Seattle, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 66.2 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 41.0 F).

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 junio 12, 2025.
Get a feel of what it's like to fly with Alaska Airlines, Southwest and Delta from Phoenix to Seattle by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Boarding

8.1

Entertainment

7.1

Overall

8.0

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Boarding

8.1

Entertainment

7.1

Overall

8.0

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Southwest
8.0
Very good
4,287 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Boarding

8.1

Entertainment

7.1

Overall

8.0

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Delta
8.0
Very good
7,950 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Boarding

8.1

Entertainment

7.1

Overall

8.0

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Hawaiian Airlines
7.9
Good
2,494 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Boarding

8.1

Entertainment

7.1

Overall

8.0

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
United Airlines
7.4
Good
8,790 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Boarding

8.1

Entertainment

7.1

Overall

8.0

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

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. 9 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 38 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 $103. Other airlines that can offer you cheap pricing are Southwest, from $107, and Alaska Airlines, from $115. These flights start at 44% 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 Southwest. According to our data, you can fly for as low as $58. Users have also found prices from $59 and $65 on United Airlines and Hawaiian Airlines, respectively.

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

    Consider WestJet (93%), Delta (93%) or Condor (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?

    Looking at all options, your cheapest flight can be booked for $51. While the most popular route (Phoenix Sky Harbor Intl - Seattle/Tacoma Intl) can be booked for $97 on average our data indicates $1,213 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 July is currently the most expensive (average of $391). 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 Phoenix Sky Harbor Intl Airport?

Book flights to Phoenix Sky Harbor Intl Airport if you plan to visit one of these locations
SeaTac
Tukwila
Tacoma
Lakewood
Ocean Shores
Lacey
Leavenworth
Federal Way
Lynnwood
Olympia
Shoreline
Kent
Cle Elum
Centralia
Kirkland
Aberdeen
Renton
Shelton
Silverdale
Issaquah

Browse thousands of different options on Cheapflights for your next trip

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Top 8 airlines flying from Sky Harbor Intl to Seattle

Discover the top 8 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 junio 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$47Average$136FlexibilityNo cancel feeOn-time62%
Hawaiian AirlinesCheapest$88Average$209FlexibilityNo cancel feeOn-time85%
Spirit AirlinesCheapest$95Average$198FlexibilityNo cancel feeOn-time65%
DeltaCheapest$98Average$200FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$119Average$222FlexibilityNo cancel feeOn-time75%
SouthwestCheapest$124Average$202FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$163Average$292FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$182Average$299FlexibilityNo cancel feeOn-time69%

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