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Cheap flights from Sydney to Seattle from $429

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Sydney to Seattle departing on 10/15. 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 Sydney to Seattle

Cheap round-trip flights

Air Canada Logo
10:20 am - 9:21 amSYD-SEA
17h 01m1 stop
Air Canada Logo
5:50 am - 8:35 amSEA-SYD
32h 45m1 stop
$752Air Canada
Find Deal
Fri, Oct 10 - Sun, Oct 26
Air Canada Logo
10:20 am - 7:16 pmSYD-SEA
26h 56m1 stop
Air Canada Logo
10:05 am - 9:35 amSEA-SYD
28h 30m1 stop
$754Air Canada
Find Deal
Sun, Oct 26 - Tue, Nov 11
Multiple Airlines Logo
10:20 am - 9:21 amSYD-SEA
17h 01m1 stop
Multiple Airlines Logo
8:00 pm - 2:40 pmSEA-SYD
24h 40m2 stops
$776Multiple Airlines
Find Deal
Fri, Oct 17 - Sun, Oct 26
Multiple Airlines Logo
7:30 am - 9:21 amSYD-SEA
19h 51m2 stops
Multiple Airlines Logo
8:00 pm - 2:40 pmSEA-SYD
23h 40m2 stops
$777Multiple Airlines
Find Deal
Fri, Oct 24 - Sun, Nov 2
Hawaiian Airlines Logo
9:40 pm - 11:32 pmSYD-SEA
19h 52m1 stop
Hawaiian Airlines Logo
7:00 am - 7:45 pmSEA-SYD
17h 45m1 stop
$812Hawaiian Airlines
Find Deal
Thu, Oct 30 - Thu, Nov 6
Hawaiian Airlines Logo
9:40 pm - 8:15 pmSYD-SEA
17h 35m1 stop
Hawaiian Airlines Logo
7:20 am - 7:45 pmSEA-SYD
17h 25m1 stop
$813Hawaiian Airlines
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Mon, Jan 26 - Thu, Feb 19
United Airlines Logo
11:20 am - 12:02 pmSYD-SEA
18h 42m1 stop
United Airlines Logo
5:07 pm - 9:05 amSEA-SYD
21h 58m1 stop
$841United Airlines
Find Deal
Fri, Oct 10 - Sun, Oct 26
Delta Logo
10:25 am - 1:00 pmSYD-SEA
20h 35m1 stop
Delta Logo
9:45 pm - 8:30 amSEA-SYD
39h 45m1 stop
$851Delta
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Wed, Oct 15 - Fri, Nov 21
United Airlines Logo
10:30 am - 11:56 amSYD-SEA
19h 26m1 stop
United Airlines Logo
2:40 pm - 9:15 amSEA-SYD
23h 35m1 stop
$852United Airlines
Find Deal
Sat, Oct 25 - Sun, Nov 2
Delta Logo
9:40 am - 1:00 pmSYD-SEA
21h 20m1 stop
Delta Logo
9:30 am - 6:05 amSEA-SYD
26h 35m1 stop
$870Delta
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Wed, Mar 11 - Sun, Mar 15

Air Canada flights from Sydney to Seattle

Our best Air Canada deals on Sydney to Seattle flight tickets
Air Canada
Oct 10
SYD10:20 amSydney Kingsford Smith
17h 01m
1 stop
SEA9:21 amSeattle/Tacoma Intl
Oct 26
SEA5:50 amSeattle/Tacoma Intl
32h 45m
1 stop
SYD8:35 amSydney Kingsford Smith
$752
Find similar
Air Canada
Oct 26
SYD10:20 amSydney Kingsford Smith
26h 56m
1 stop
SEA7:16 pmSeattle/Tacoma Intl
Nov 11
SEA10:05 amSeattle/Tacoma Intl
28h 30m
1 stop
SYD9:35 amSydney Kingsford Smith
$754
Find similar
Air Canada
Oct 17
SYD10:20 amSydney Kingsford Smith
17h 01m
1 stop
SEA9:21 amSeattle/Tacoma Intl
Oct 26
SEA3:40 pmSeattle/Tacoma Intl
22h 55m
1 stop
SYD8:35 amSydney Kingsford Smith
$763
Find similar

United Airlines flights from Sydney to Seattle

Our best United Airlines deals on Sydney to Seattle flight tickets
United Airlines
Oct 10
SYD11:20 amSydney Kingsford Smith
18h 42m
1 stop
SEA12:02 pmSeattle/Tacoma Intl
Oct 26
SEA5:07 pmSeattle/Tacoma Intl
21h 58m
1 stop
SYD9:05 amSydney Kingsford Smith
$841
Find similar
United Airlines
Oct 25
SYD10:30 amSydney Kingsford Smith
19h 26m
1 stop
SEA11:56 amSeattle/Tacoma Intl
Nov 2
SEA2:40 pmSeattle/Tacoma Intl
23h 35m
1 stop
SYD9:15 amSydney Kingsford Smith
$852
Find similar
United Airlines
Nov 1
SYD11:05 amSydney Kingsford Smith
26h 20m
2 stops
SEA7:25 pmSeattle/Tacoma Intl
Nov 8
SEA12:00 pmSeattle/Tacoma Intl
26h 15m
2 stops
SYD9:15 amSydney Kingsford Smith
$853
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Sydney 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 17, 2025.
Use the filters below to find and compare flights from Sydney to Seattle that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

SydneySeattle

SYD - SEA

SYDSEA

Sydney Kingsford Smith

Fri 10/10

10:20 am-9:21 am

1 stop17h 01m

Seattle/Tacoma Intl

Sun 10/26

5:50 am-8:35 am

1 stop32h 45m

$752

SydneySeattle

SYD - SEA

SYDSEA

Sydney Kingsford Smith

Sun 10/26

10:20 am-7:16 pm

1 stop26h 56m

Seattle/Tacoma Intl

Tue 11/11

10:05 am-9:35 am

1 stop28h 30m

$754

SydneySeattle

SYD - SEA

SYDSEA

Sydney Kingsford Smith

Fri 10/17

10:20 am-9:21 am

1 stop17h 01m

Seattle/Tacoma Intl

Sun 10/26

8:00 pm-2:40 pm

2 stops24h 40m

$776

SydneySeattle

SYD - SEA

SYDSEA

Sydney Kingsford Smith

Fri 10/24

7:30 am-9:21 am

2 stops19h 51m

Seattle/Tacoma Intl

Sun 11/2

8:00 pm-2:40 pm

2 stops23h 40m

$777

SydneySeattle

SYD - SEA

SYDSEA

Sydney Kingsford Smith

Thu 10/30

9:40 pm-11:32 pm

1 stop19h 52m

Seattle/Tacoma Intl

Thu 11/6

7:00 am-7:45 pm

1 stop17h 45m

$812

SydneySeattle

SYD - SEA

SYDSEA

Sydney Kingsford Smith

Mon 1/26

9:40 pm-8:15 pm

1 stop17h 35m

Seattle/Tacoma Intl

Thu 2/19

7:20 am-7:45 pm

1 stop17h 25m

$813

SydneySeattle

SYD - SEA

SYDSEA

Sydney Kingsford Smith

Fri 10/10

11:20 am-12:02 pm

1 stop18h 42m

Seattle/Tacoma Intl

Sun 10/26

5:07 pm-9:05 am

1 stop21h 58m

$841

SydneySeattle

SYD - SEA

SYDSEA

Sydney Kingsford Smith

Wed 10/15

10:25 am-1:00 pm

1 stop20h 35m

Seattle/Tacoma Intl

Fri 11/21

9:45 pm-8:30 am

1 stop39h 45m

$851

SydneySeattle

SYD - SEA

SYDSEA

Sydney Kingsford Smith

Sat 10/25

10:30 am-11:56 am

1 stop19h 26m

Seattle/Tacoma Intl

Sun 11/2

2:40 pm-9:15 am

1 stop23h 35m

$852

SydneySeattle

SYD - SEA

SYDSEA

Sydney Kingsford Smith

Wed 3/11

9:40 am-1:00 pm

1 stop21h 20m

Seattle/Tacoma Intl

Sun 3/15

9:30 am-6:05 am

1 stop26h 35m

$870

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 Sydney 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 Sydney and Seattle?

What is the cheapest month to fly to Seattle?

In general, August is the cheapest month to fly from Sydney to Seattle. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $942. If you don’t want to visit Seattle in August, then you should wait until February to fly from Sydney, when ticket prices are also cheap, with an average price of $987.

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

On average, the least expensive day to fly to Seattle from Sydney is on a Saturday. momondo users have found tickets for Saturday departures for as low as $1,069. 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 Sydney because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $1,337.

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

Flying to Seattle from Sydney in the morning is the least expensive time of day to depart. momondo users have found prices as low as $1,213 when looking at flights departing in the morning. Flights to Seattle are more costly in the afternoon, with an average ticket price of $1,679. Departure times in the afternoon fall within the peak daily travel times, which is why tickets can be more expensive.

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

You are more likely to see cheaper flights to Seattle from Sydney when booking weeks ahead of your departure date. In general, you can expect to find flights to Seattle for around $1,106 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Seattle from Sydney for as low as $894 on momondo.

How have Sydney to Seattle flight prices changed over time?

As of September 2025, prices for Sydney to Seattle flights are approximately 38% cheaper when compared to flights at the same time last year.

When to book flights from Sydney to Seattle

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

Cheap Sydney to Seattle (SYD to SEA) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Sydney to Seattle

Direct flights

None
There are no direct flights from Sydney to Seattle. There are no popular flight routes from Sydney to Seattle.
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  • How far is Sydney Kingsford Smith to Seattle/Tacoma Intl by plane?

    Seattle/Tacoma Intl is 7743.7 mi away from Sydney Kingsford Smith. Flights usually cover this in 17h 01m, depending on flying conditions and air traffic around both airports.

  • When did momondo last update prices for flights from Sydney Kingsford Smith Airport to Seattle/Tacoma Intl Airport?

    Prices for flights from Sydney Kingsford Smith Airport to Seattle/Tacoma Intl Airport are refreshed on a daily basis.

  • How many operators does momondo search for flights from Sydney Kingsford Smith Airport to Seattle/Tacoma Intl Airport?

  • How old do you have to be to fly from Sydney Kingsford Smith 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 Sydney Kingsford Smith Airport to Seattle/Tacoma Intl Airport.

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

    The travel and health documents required for your trip to Seattle/Tacoma Intl Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Seattle/Tacoma Intl Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • What is the most popular airline from Sydney to Seattle?

Best airlines flying from Sydney to Seattle

Compare and see reviews for airlines that fly from Sydney to Seattle with momondo
Airline
Rating
Free Cancellation
Price
Air CanadaPriceFrom $598Free CancellationRating
7.1
10,000 reviews
Search Air Canada flights
United AirlinesPriceFrom $794Free CancellationRating
7.4
8,926 reviews
Search United Airlines flights
DeltaPriceFrom $802Free CancellationRating
7.9
7,961 reviews
Search Delta flights
Hawaiian AirlinesPriceFrom $917Free CancellationRating
7.8
2,729 reviews
Search Hawaiian Airlines flights

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
Marysville
Puyallup
Federal Way
Kirkland
Tukwila
Shoreline
Lakewood
Centralia
Fife
Cle Elum
Redmond
Westport

Why use momondo?

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

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Sydney to Seattle for you.

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

Yes. All flights to Seattle from Sydney on momondo can be compared and filtered by various policies on offer, including flexible booking.

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

momondo helps you find the best flight between Sydney and Seattle by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

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

Yes momondo offers price alerts on flights to Seattle from Sydney. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

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