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Cheap flights from Phoenix Sky Harbor Intl Airport to Seattle from $79

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 9/27. 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
6:00 am - 8:18 amPHX-SEA
3h 18mnonstop
Frontier Logo
12:58 pm - 11:01 pmSEA-PHX
9h 03m1 stop
$100Frontier
Find Deal
Thu, Nov 6 - Sun, Nov 9
Logo
9:00 am - 12:15 pmPHX-SEA
3h 15mnonstop
Logo
10:00 pm - 12:59 amSEA-PHX
2h 59mnonstop
$101
Find Deal
Wed, Oct 8 - Fri, Oct 10
Frontier Logo
6:00 am - 8:18 amPHX-SEA
3h 18mnonstop
Frontier Logo
12:58 pm - 11:02 pmSEA-PHX
9h 04m1 stop
$103Frontier
Find Deal
Thu, Nov 13 - Sun, Nov 16
Frontier Logo
6:00 am - 8:18 amPHX-SEA
3h 18mnonstop
Frontier Logo
8:22 pm - 12:24 amSEA-PHX
3h 02mnonstop
$104Frontier
Find Deal
Thu, Nov 6 - Mon, Nov 10
Delta Logo
7:05 am - 10:20 amPHX-SEA
3h 15mnonstop
Delta Logo
11:45 am - 2:42 pmSEA-PHX
2h 57mnonstop
$105Delta
Find Deal
Wed, Oct 15 - Tue, Oct 21
Frontier Logo
6:05 am - 9:20 amPHX-SEA
3h 15mnonstop
Frontier Logo
4:36 pm - 11:59 amSEA-PHX
19h 23m1 stop
$106Frontier
Find Deal
Fri, Oct 3 - Mon, Oct 6
Alaska Airlines Logo
12:09 pm - 3:20 pmPHX-SEA
3h 11mnonstop
Alaska Airlines Logo
8:45 pm - 11:40 pmSEA-PHX
2h 55mnonstop
$107Alaska Airlines
Find Deal
Tue, Oct 7 - Tue, Oct 14
Delta Logo
1:50 pm - 4:56 pmPHX-SEA
3h 06mnonstop
Delta Logo
7:35 pm - 10:26 pmSEA-PHX
2h 51mnonstop
$109Delta
Find Deal
Tue, Sep 30 - Tue, Oct 7
Southwest Logo
8:00 pm - 11:00 pmPHX-SEA
3h 00mnonstop
Southwest Logo
4:40 pm - 9:15 pmSEA-PHX
4h 35m1 stop
$115Southwest
Find Deal
Tue, Oct 21 - Tue, Oct 28
Southwest Logo
8:00 pm - 11:00 pmPHX-SEA
3h 00mnonstop
Southwest Logo
6:55 am - 1:15 pmSEA-PHX
6h 20m1 stop
$117Southwest
Find Deal
Tue, Oct 7 - Tue, Oct 14

Delta flights from Phoenix Sky Harbor Intl Airport to Seattle

Our best Delta deals on Phoenix Sky Harbor Intl Airport to Seattle flight tickets
Delta
Oct 15
PHX7:05 amPhoenix Sky Harbor Intl
3h 15m
SEA10:20 amSeattle/Tacoma Intl
Oct 21
SEA11:45 amSeattle/Tacoma Intl
2h 57m
PHX2:42 pmPhoenix Sky Harbor Intl
$105
Find similar
Delta
Sep 30
PHX1:50 pmPhoenix Sky Harbor Intl
3h 06m
SEA4:56 pmSeattle/Tacoma Intl
Oct 7
SEA7:35 pmSeattle/Tacoma Intl
2h 51m
PHX10:26 pmPhoenix Sky Harbor Intl
$109
Find similar
Delta
Oct 14
PHX1:45 pmPhoenix Sky Harbor Intl
3h 11m
SEA4:56 pmSeattle/Tacoma Intl
Oct 18
SEA11:45 amSeattle/Tacoma Intl
2h 57m
PHX2:42 pmPhoenix Sky Harbor Intl
$127
Find similar

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
Nov 6
PHX6:00 amPhoenix Sky Harbor Intl
3h 18m
SEA8:18 amSeattle/Tacoma Intl
Nov 9
SEA12:58 pmSeattle/Tacoma Intl
9h 03m
1 stop
PHX11:01 pmPhoenix Sky Harbor Intl
$100
Find similar
Frontier
Nov 13
PHX6:00 amPhoenix Sky Harbor Intl
3h 18m
SEA8:18 amSeattle/Tacoma Intl
Nov 16
SEA12:58 pmSeattle/Tacoma Intl
9h 04m
1 stop
PHX11:02 pmPhoenix Sky Harbor Intl
$103
Find similar
Frontier
Nov 6
PHX6:00 amPhoenix Sky Harbor Intl
3h 18m
SEA8:18 amSeattle/Tacoma Intl
Nov 10
SEA8:22 pmSeattle/Tacoma Intl
3h 02m
PHX12:24 amPhoenix Sky Harbor Intl
$104
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 September 11, 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

Thu 11/6

6:00 am-8:18 am

Nonstop3h 18m

Seattle/Tacoma Intl

Sun 11/9

12:58 pm-11:01 pm

1 stop9h 03m

$100

PhoenixSeattle

PHX - SEA

PHXSEA

Phoenix Sky Harbor Intl

Wed 10/8

9:00 am-12:15 pm

Nonstop3h 15m

Seattle/Tacoma Intl

Fri 10/10

10:00 pm-12:59 am

Nonstop2h 59m

$101

PhoenixSeattle

PHX - SEA

PHXSEA

Phoenix Sky Harbor Intl

Thu 11/13

6:00 am-8:18 am

Nonstop3h 18m

Seattle/Tacoma Intl

Sun 11/16

12:58 pm-11:02 pm

1 stop9h 04m

$103

PhoenixSeattle

PHX - SEA

PHXSEA

Phoenix Sky Harbor Intl

Thu 11/6

6:00 am-8:18 am

Nonstop3h 18m

Seattle/Tacoma Intl

Mon 11/10

8:22 pm-12:24 am

Nonstop3h 02m

$104

PhoenixSeattle

PHX - SEA

PHXSEA

Phoenix Sky Harbor Intl

Wed 10/15

7:05 am-10:20 am

Nonstop3h 15m

Seattle/Tacoma Intl

Tue 10/21

11:45 am-2:42 pm

Nonstop2h 57m

$105

PhoenixSeattle

PHX - SEA

PHXSEA

Phoenix Sky Harbor Intl

Fri 10/3

6:05 am-9:20 am

Nonstop3h 15m

Seattle/Tacoma Intl

Mon 10/6

4:36 pm-11:59 am

1 stop19h 23m

$106

PhoenixSeattle

PHX - SEA

PHXSEA

Phoenix Sky Harbor Intl

Tue 10/7

12:09 pm-3:20 pm

Nonstop3h 11m

Seattle/Tacoma Intl

Tue 10/14

8:45 pm-11:40 pm

Nonstop2h 55m

$107

PhoenixSeattle

PHX - SEA

PHXSEA

Phoenix Sky Harbor Intl

Tue 9/30

1:50 pm-4:56 pm

Nonstop3h 06m

Seattle/Tacoma Intl

Tue 10/7

7:35 pm-10:26 pm

Nonstop2h 51m

$109

PhoenixSeattle

PHX - SEA

PHXSEA

Phoenix Sky Harbor Intl

Tue 10/21

8:00 pm-11:00 pm

Nonstop3h 00m

Seattle/Tacoma Intl

Tue 10/28

4:40 pm-9:15 pm

1 stop4h 35m

$115

PhoenixSeattle

PHX - SEA

PHXSEA

Phoenix Sky Harbor Intl

Tue 10/7

8:00 pm-11:00 pm

Nonstop3h 00m

Seattle/Tacoma Intl

Tue 10/14

6:55 am-1:15 pm

1 stop6h 20m

$117

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 typical price of a round-trip flight between Phoenix Sky Harbor Intl Airport and Seattle?

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 October 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 $266. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Monday 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 $444.

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 $231 when looking at flights departing at noon. Flights to Seattle are more costly in the evening, with an average ticket price of $453. 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 $189 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 $160 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 September 2025, prices for Phoenix Sky Harbor Intl Airport to Seattle flights are approximately 12% more expensive 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

$101

Fastest flight time

2h 59m

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 $101. The best round-trip flight deal from Phoenix Sky Harbor Intl Airport to Seattle found on momondo in the last 72 hours is $165.
The fastest flight from Phoenix Sky Harbor Intl Airport to Seattle takes 2h 59m
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 00m 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
5.8
3,177 reviews
Search Frontier flights
Hawaiian AirlinesPriceFrom $87Free CancellationRating
7.8
2,723 reviews
Search Hawaiian Airlines flights
DeltaPriceFrom $98Free CancellationRating
7.9
7,960 reviews
Search Delta flights
SouthwestPriceFrom $108Free CancellationRating
8.0
4,248 reviews
Search Southwest flights
Alaska AirlinesPriceFrom $134Free CancellationRating
8.0
10,000 reviews
Search Alaska Airlines flights
American AirlinesPriceFrom $143Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights

  • Southwest Flights From Phoenix Sky Harbor Intl Airport to Seattle

    The lowest priced Southwest flight from Phoenix Sky Harbor Intl Airport to Seattle from the last 72 hours was $108. Generally, Southwest has 19 flights on this route every week with an average price of $206. Southwest is rated 8.0/10 by our users.

  • Alaska Airlines Flights From Phoenix Sky Harbor Intl Airport to Seattle

    Alaska Airlines (8.0/10 from 10,000 reviews) operates around 11 flights from Phoenix Sky Harbor Intl Airport to Seattle in any given week. The average Alaska Airlines airfare for this route is around $225, with deals from around $134 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
Renton
Olympia
Lynnwood
Kent
Puyallup
Marysville
Federal Way
Kirkland
Lakewood
Tukwila
Centralia
Shoreline
Fife
Cle Elum
Redmond
Westport

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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