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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 momondo user in the last 72 hours by searching for a flight from Phoenix Sky Harbor Intl Airport to Seattle departing on 10/2. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Phoenix Sky Harbor Intl Airport to Seattle

Cheap round-trip flights

Frontier Logo
2:15 pm - 5:33 pmPHX-SEA
3h 18mnonstop
Frontier Logo
8:31 pm - 11:31 pmSEA-PHX
3h 00mnonstop
$63Frontier
Find Deal
Fri, Sep 5 - Sun, Sep 7
Frontier Logo
6:05 am - 9:20 amPHX-SEA
3h 15mnonstop
Frontier Logo
8:31 pm - 11:31 pmSEA-PHX
3h 00mnonstop
$66Frontier
Find Deal
Sun, Sep 14 - Thu, Sep 18
Frontier Logo
6:05 am - 9:20 amPHX-SEA
3h 15mnonstop
Frontier Logo
8:31 pm - 11:31 pmSEA-PHX
3h 00mnonstop
$69Frontier
Find Deal
Thu, Sep 25 - Mon, Sep 29
Frontier Logo
2:15 pm - 5:33 pmPHX-SEA
3h 18mnonstop
Frontier Logo
8:31 pm - 11:31 pmSEA-PHX
3h 00mnonstop
$77Frontier
Find Deal
Fri, Sep 5 - Mon, Sep 8
Frontier Logo
6:05 am - 9:20 amPHX-SEA
3h 15mnonstop
Frontier Logo
8:31 pm - 11:31 pmSEA-PHX
3h 00mnonstop
$78Frontier
Find Deal
Thu, Oct 2 - Mon, Oct 6
Frontier Logo
2:21 pm - 5:38 pmPHX-SEA
3h 17mnonstop
Frontier Logo
12:58 pm - 4:02 pmSEA-PHX
3h 04mnonstop
$79Frontier
Find Deal
Mon, Oct 27 - Fri, Oct 31
Frontier Logo
6:05 am - 9:20 amPHX-SEA
3h 15mnonstop
Frontier Logo
8:31 pm - 11:31 pmSEA-PHX
3h 00mnonstop
$80Frontier
Find Deal
Sun, Sep 28 - Thu, Oct 2
Frontier Logo
2:15 pm - 5:33 pmPHX-SEA
3h 18mnonstop
Frontier Logo
8:31 pm - 11:31 pmSEA-PHX
3h 00mnonstop
$84Frontier
Find Deal
Sun, Sep 7 - Mon, Sep 15
Logo
4:30 pm - 10:59 pmPHX-SEA
6h 29m1 stop
Logo
8:31 pm - 11:31 pmSEA-PHX
3h 00mnonstop
$136
Find Deal
Tue, Sep 9 - Fri, Sep 19
Logo
6:48 am - 10:02 amPHX-SEA
3h 14mnonstop
Logo
4:10 pm - 7:10 pmSEA-PHX
3h 00mnonstop
$139
Find Deal
Mon, Aug 18 - Wed, Aug 20

Frontier flights from Phoenix Sky Harbor Intl Airport to Seattle

Our best Frontier deals on Phoenix Sky Harbor Intl Airport to Seattle flight tickets
Frontier
Sep 5
PHX2:15 pmPhoenix Sky Harbor Intl
3h 18m
SEA5:33 pmSeattle/Tacoma Intl
Sep 7
SEA8:31 pmSeattle/Tacoma Intl
3h 00m
PHX11:31 pmPhoenix Sky Harbor Intl
$63
Find similar
Frontier
Sep 14
PHX6:05 amPhoenix Sky Harbor Intl
3h 15m
SEA9:20 amSeattle/Tacoma Intl
Sep 18
SEA8:31 pmSeattle/Tacoma Intl
3h 00m
PHX11:31 pmPhoenix Sky Harbor Intl
$66
Find similar
Frontier
Sep 25
PHX6:05 amPhoenix Sky Harbor Intl
3h 15m
SEA9:20 amSeattle/Tacoma Intl
Sep 29
SEA8:31 pmSeattle/Tacoma Intl
3h 00m
PHX11:31 pmPhoenix Sky Harbor Intl
$69
Find similar

Hawaiian Airlines flights from Phoenix Sky Harbor Intl Airport to Seattle

Our best Hawaiian Airlines deals on Phoenix Sky Harbor Intl Airport to Seattle flight tickets
Hawaiian Airlines
Aug 13
PHX10:46 amPhoenix Sky Harbor Intl
3h 07m
SEA1:53 pmSeattle/Tacoma Intl
Aug 20
SEA9:50 amSeattle/Tacoma Intl
3h 04m
PHX12:54 pmPhoenix Sky Harbor Intl
$183
Find similar
Hawaiian Airlines
Aug 12
PHX11:52 amPhoenix Sky Harbor Intl
3h 06m
SEA2:58 pmSeattle/Tacoma Intl
Sep 2
SEA12:25 pmSeattle/Tacoma Intl
6h 52m
1 stop
PHX7:17 pmPhoenix Sky Harbor Intl
$203
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Phoenix Sky Harbor Intl Airport 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, momondo users made 832,500 searches. Data last updated July 30, 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

Fly to

Route

Depart

Return

Price

PhoenixSeattle

PHX - SEA

PHXSEA

Phoenix Sky Harbor Intl

Fri 9/5

2:15 pm-5:33 pm

Nonstop3h 18m

Seattle/Tacoma Intl

Sun 9/7

8:31 pm-11:31 pm

Nonstop3h 00m

$63

PhoenixSeattle

PHX - SEA

PHXSEA

Phoenix Sky Harbor Intl

Sun 9/14

6:05 am-9:20 am

Nonstop3h 15m

Seattle/Tacoma Intl

Thu 9/18

8:31 pm-11:31 pm

Nonstop3h 00m

$66

PhoenixSeattle

PHX - SEA

PHXSEA

Phoenix Sky Harbor Intl

Thu 9/25

6:05 am-9:20 am

Nonstop3h 15m

Seattle/Tacoma Intl

Mon 9/29

8:31 pm-11:31 pm

Nonstop3h 00m

$69

PhoenixSeattle

PHX - SEA

PHXSEA

Phoenix Sky Harbor Intl

Fri 9/5

2:15 pm-5:33 pm

Nonstop3h 18m

Seattle/Tacoma Intl

Mon 9/8

8:31 pm-11:31 pm

Nonstop3h 00m

$77

PhoenixSeattle

PHX - SEA

PHXSEA

Phoenix Sky Harbor Intl

Thu 10/2

6:05 am-9:20 am

Nonstop3h 15m

Seattle/Tacoma Intl

Mon 10/6

8:31 pm-11:31 pm

Nonstop3h 00m

$78

PhoenixSeattle

PHX - SEA

PHXSEA

Phoenix Sky Harbor Intl

Mon 10/27

2:21 pm-5:38 pm

Nonstop3h 17m

Seattle/Tacoma Intl

Fri 10/31

12:58 pm-4:02 pm

Nonstop3h 04m

$79

PhoenixSeattle

PHX - SEA

PHXSEA

Phoenix Sky Harbor Intl

Sun 9/28

6:05 am-9:20 am

Nonstop3h 15m

Seattle/Tacoma Intl

Thu 10/2

8:31 pm-11:31 pm

Nonstop3h 00m

$80

PhoenixSeattle

PHX - SEA

PHXSEA

Phoenix Sky Harbor Intl

Sun 9/7

2:15 pm-5:33 pm

Nonstop3h 18m

Seattle/Tacoma Intl

Mon 9/15

8:31 pm-11:31 pm

Nonstop3h 00m

$84

PhoenixSeattle

PHX - SEA

PHXSEA

Phoenix Sky Harbor Intl

Tue 9/9

4:30 pm-10:59 pm

1 stop6h 29m

Seattle/Tacoma Intl

Fri 9/19

8:31 pm-11:31 pm

Nonstop3h 00m

$136

PhoenixSeattle

PHX - SEA

PHXSEA

Phoenix Sky Harbor Intl

Mon 8/18

6:48 am-10:02 am

Nonstop3h 14m

Seattle/Tacoma Intl

Wed 8/20

4:10 pm-7:10 pm

Nonstop3h 00m

$139

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Seattle from

How to get the cheapest flight ticket from Phoenix Sky Harbor Intl Airport to Seattle

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Seattle?

In general, January is the cheapest month to fly from Phoenix Sky Harbor Intl Airport to Seattle. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $146. If you don’t want to visit Seattle in January, then you should wait until September to fly from Phoenix Sky Harbor Intl Airport, when ticket prices are also cheap, with an average price of $166.

What is the cheapest day to depart on your flight to Seattle?

On average, the least expensive day to fly to Seattle from Phoenix Sky Harbor Intl Airport is on a Friday. momondo users have found tickets for Friday departures for as low as $264. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Sunday is the most expensive day to depart from Phoenix Sky Harbor Intl Airport because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $432.

What is the cheapest time of day to depart on your flight to Seattle?

Flying to Seattle from Phoenix Sky Harbor Intl Airport at noon is the least expensive time of day to depart. momondo users have found prices as low as $240 when looking at flights departing at noon. Flights to Seattle are more costly in the evening, with an average ticket price of $415. Departure times in the evening fall within the peak daily travel times, which is why tickets can be more expensive.

What is the cheapest Phoenix Sky Harbor Intl to Seattle/Tacoma Intl flight route?

Fly from Phoenix Sky Harbor Intl to Seattle/Tacoma Intl for the best Phoenix Sky Harbor Intl - Seattle/Tacoma Intl flight prices

How far in advance should I book a flight to Seattle?

You are more likely to see cheaper flights to Seattle from Phoenix Sky Harbor Intl Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Seattle for around $187 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Seattle from Phoenix Sky Harbor Intl Airport for as low as $157 on momondo.

What cabin class options are available on Phoenix Sky Harbor Intl to Seattle/Tacoma Intl flights?

There are 4 cabin classes available to choose from on Phoenix Sky Harbor Intl to Seattle/Tacoma Intl flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

How have Phoenix Sky Harbor Intl Airport to Seattle flight prices changed over time?

As of July 2025, prices for Phoenix Sky Harbor Intl Airport to Seattle flights are approximately 28% cheaper when compared to flights at the same time last year.

When to book flights from Phoenix Sky Harbor Intl Airport to Seattle

Are you open to changing your travel dates? Check out the ideal times to fly from Phoenix Sky Harbor Intl Airport to Seattle according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Phoenix Sky Harbor Intl Airport to Seattle (PHX to SEA) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Phoenix Sky Harbor Intl Airport to Seattle

Best Price Found

$37

Fastest flight time

3h 07m

Direct flights

Every day

Airports in Seattle

1 airport
The best one-way flight to Seattle from Phoenix Sky Harbor Intl Airport in the past 72 hours is $37. The best round-trip flight deal from Phoenix Sky Harbor Intl Airport to Seattle found on momondo in the last 72 hours is $63.
The fastest flight from Phoenix Sky Harbor Intl Airport to Seattle takes 3h 07m
Direct flights go from Phoenix Sky Harbor Intl Airport to Seattle every day.
There is 1 airport near Seattle: Seattle/Tacoma Intl (SEA)
Search flight deals

  • How far is Phoenix Sky Harbor Intl to Seattle/Tacoma Intl by plane?

    Phoenix Sky Harbor Intl and Seattle/Tacoma Intl are 1117.0 mi apart from one another. Typically, this will take 3h 14m by plane in normal conditions.

  • When did momondo last update prices for flights from Phoenix Sky Harbor Intl Airport to Seattle/Tacoma Intl Airport?

    Prices for flights from Phoenix Sky Harbor Intl Airport to Seattle/Tacoma Intl Airport refresh daily.

  • How many operators does momondo search for flights from Phoenix Sky Harbor Intl Airport to Seattle/Tacoma Intl Airport?

  • How old do you have to be to fly from Phoenix Sky Harbor Intl Airport to Seattle/Tacoma Intl Airport?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Phoenix Sky Harbor Intl Airport to Seattle/Tacoma Intl Airport.

  • What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?

    The required travel and health documents for your Seattle/Tacoma Intl Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Seattle/Tacoma Intl Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • What is the most popular plane model from Phoenix Sky Harbor Intl Airport to Seattle?

  • What is the most popular airline from Phoenix Sky Harbor Intl Airport to Seattle?

Best airlines flying from Phoenix Sky Harbor Intl Airport to Seattle

Compare and see reviews for airlines that fly from Phoenix Sky Harbor Intl Airport to Seattle with momondo
Airline
Rating
Free Cancellation
Price
FrontierPriceFrom $53Free CancellationRating
5.9
3,237 reviews
Search Frontier flights
Hawaiian AirlinesPriceFrom $89Free CancellationRating
7.8
2,611 reviews
Search Hawaiian Airlines flights
Spirit AirlinesPriceFrom $95Free CancellationRating
6.3
8,048 reviews
Search Spirit Airlines flights
DeltaPriceFrom $97Free CancellationRating
8.0
7,980 reviews
Search Delta flights
SouthwestPriceFrom $112Free CancellationRating
8.0
4,241 reviews
Search Southwest flights
Alaska AirlinesPriceFrom $130Free CancellationRating
8.0
10,000 reviews
Search Alaska Airlines flights
American AirlinesPriceFrom $143Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights

  • Delta Flights From Phoenix Sky Harbor Intl Airport to Seattle

    The lowest priced Delta flight from Phoenix Sky Harbor Intl Airport to Seattle from the last 72 hours was $97. Generally, Delta has 27 flights on this route every week with an average price of $197. Delta is rated 8.0/10 by our users.

  • Southwest Flights From Phoenix Sky Harbor Intl Airport to Seattle

    Southwest (8.0/10 from 4,241 reviews) operates around 21 flights from Phoenix Sky Harbor Intl Airport to Seattle in any given week. The average Southwest airfare for this route is around $197, with deals from around $112 rare but found on momondo. Referenced prices are for round-trip Phoenix Sky Harbor Intl Airport to Seattle flight searches in the last 72 hours.

Traveling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
Leavenworth
Tacoma
SeaTac
Ocean Shores
Olympia
Renton
Kent
Federal Way
Puyallup
Lynnwood
Marysville
Tukwila
Kirkland
Lakewood
Fife
Centralia
Cle Elum
Shoreline
Westport
Redmond

Why use momondo?

Why should I use momondo to find a flight deal from Phoenix to Seattle?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Phoenix to Seattle. momondo saves you time and could save you money on your trip.

Can I find flights from Phoenix to Seattle with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Phoenix to Seattle flights to just show those with flexible booking policies.

How can momondo help me find flights from Phoenix to Seattle?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Seattle from Phoenix.

I’m not ready to book a flight from Phoenix to Seattle right now. Can momondo alert me if prices change?

Yes. momondo can track prices for Phoenix to Seattle flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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