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Cheap flights from Sydney to Seattle from $519

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 1/24. 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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0 bags

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Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
9:20 pm - 10:06 pm
SYD
-
SEA
42h 46m2 stops
Multiple Airlines Logo
10:30 pm - 9:50 am
SEA
-
SYD
41h 20m1 stop
$918Multiple Airlines
Sun, Mar 8 - Sun, Mar 15
Multiple Airlines Logo
3:55 pm - 12:29 pm
SYD
-
SEA
39h 34m2 stops
Multiple Airlines Logo
3:57 pm - 5:40 pm
SEA
-
SYD
30h 43m2 stops
$932Multiple Airlines
Sat, Jan 24 - Wed, Jan 28
Multiple Airlines Logo
2:00 pm - 5:57 pm
SYD
-
SEA
22h 57m2 stops
Multiple Airlines Logo
3:50 pm - 12:35 pm
SEA
-
SYD
26h 45m2 stops
$938Multiple Airlines
Sun, Mar 8 - Sun, Mar 15
Asiana Airlines Logo
10:20 am - 1:55 pm
SYD
-
SEA
22h 35m1 stop
Asiana Airlines Logo
12:10 am - 8:20 am
SEA
-
SYD
38h 10m1 stop
$958Asiana Airlines
Sun, Mar 8 - Sat, Mar 14
Qantas Airways Logo
4:35 pm - 8:52 pm
SYD
-
SEA
23h 17m2 stops
Qantas Airways Logo
12:59 pm - 10:55 am
SEA
-
SYD
26h 56m2 stops
$973Qantas Airways
Wed, Jan 28 - Sat, Feb 7
Asiana Airlines Logo
9:30 am - 2:55 pm
SYD
-
SEA
22h 25m1 stop
Asiana Airlines Logo
12:10 am - 7:30 am
SEA
-
SYD
38h 20m1 stop
$979Asiana Airlines
Sun, May 31 - Fri, Jun 26
Asiana Airlines Logo
10:20 am - 1:55 pm
SYD
-
SEA
22h 35m1 stop
Asiana Airlines Logo
12:10 am - 8:20 am
SEA
-
SYD
38h 10m1 stop
$981Asiana Airlines
Fri, Mar 6 - Mon, Mar 16
Multiple Airlines Logo
1:15 pm - 6:47 pm
SYD
-
SEA
22h 32m2 stops
Multiple Airlines Logo
5:59 pm - 11:45 am
SEA
-
SYD
24h 46m2 stops
$998Multiple Airlines
Wed, Apr 15 - Fri, May 15
Multiple Airlines Logo
2:00 pm - 4:47 pm
SYD
-
SEA
21h 47m2 stops
Multiple Airlines Logo
5:59 pm - 12:35 pm
SEA
-
SYD
23h 36m2 stops
$1,000Multiple Airlines
Fri, Jan 30 - Fri, Feb 6
Qantas Airways Logo
9:55 pm - 12:29 pm
SYD
-
SEA
33h 34m2 stops
Qantas Airways Logo
12:59 pm - 1:55 pm
SEA
-
SYD
29h 56m2 stops
$1,002Qantas Airways
Sat, Jan 31 - Sat, Feb 7

Qantas Airways flights from Sydney to Seattle

Our best Qantas Airways deals on Sydney to Seattle flight tickets
Qantas Airways
Jan 28
SYD4:35 pmSydney Kingsford Smith
23h 17m
2 stops
SEA8:52 pmSeattle/Tacoma Intl
Feb 7
SEA12:59 pmSeattle/Tacoma Intl
26h 56m
2 stops
SYD10:55 amSydney Kingsford Smith
$973
Find similar
Qantas Airways
Mar 5
SYD1:00 pmSydney Kingsford Smith
25h 58m
2 stops
SEA7:58 pmSeattle/Tacoma Intl
Mar 17
SEA4:50 pmSeattle/Tacoma Intl
22h 30m
2 stops
SYD9:20 amSydney Kingsford Smith
$1,053
Find similar
Qantas Airways
Mar 5
SYD1:00 pmSydney Kingsford Smith
25h 58m
2 stops
SEA7:58 pmSeattle/Tacoma Intl
Mar 9
SEA4:50 pmSeattle/Tacoma Intl
27h 05m
2 stops
SYD1:55 pmSydney Kingsford Smith
$1,055
Find similar

Air Canada flights from Sydney to Seattle

Our best Air Canada deals on Sydney to Seattle flight tickets
Air Canada
Jan 24
SYD11:20 amSydney Kingsford Smith
22h 11m
1 stop
SEA2:31 pmSeattle/Tacoma Intl
Jan 28
SEA9:55 amSeattle/Tacoma Intl
33h 45m
2 stops
SYD2:40 pmSydney Kingsford Smith
$1,076
Find similar
Air Canada
Mar 11
SYD10:20 amSydney Kingsford Smith
22h 41m
1 stop
SEA3:01 pmSeattle/Tacoma Intl
Mar 18
SEA5:50 amSeattle/Tacoma Intl
32h 45m
1 stop
SYD8:35 amSydney Kingsford Smith
$1,095
Find similar
Air Canada
Mar 5
SYD11:20 amSydney Kingsford Smith
29h 46m
1 stop
SEA10:06 pmSeattle/Tacoma Intl
Mar 9
SEA8:00 pmSeattle/Tacoma Intl
18h 35m
1 stop
SYD8:35 amSydney Kingsford Smith
$1,096
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 December 18, 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

Sun 3/8

9:20 pm-10:06 pm

2 stops42h 46m

Seattle/Tacoma Intl

Sun 3/15

10:30 pm-9:50 am

1 stop41h 20m

$918

SydneySeattle

SYD - SEA

SYDSEA

Sydney Kingsford Smith

Sat 1/24

3:55 pm-12:29 pm

2 stops39h 34m

Seattle/Tacoma Intl

Wed 1/28

3:57 pm-5:40 pm

2 stops30h 43m

$932

SydneySeattle

SYD - SEA

SYDSEA

Sydney Kingsford Smith

Sun 3/8

2:00 pm-5:57 pm

2 stops22h 57m

Seattle/Tacoma Intl

Sun 3/15

3:50 pm-12:35 pm

2 stops26h 45m

$938

SydneySeattle

SYD - SEA

SYDSEA

Sydney Kingsford Smith

Sun 3/8

10:20 am-1:55 pm

1 stop22h 35m

Seattle/Tacoma Intl

Sat 3/14

12:10 am-8:20 am

1 stop38h 10m

$958

SydneySeattle

SYD - SEA

SYDSEA

Sydney Kingsford Smith

Wed 1/28

4:35 pm-8:52 pm

2 stops23h 17m

Seattle/Tacoma Intl

Sat 2/7

12:59 pm-10:55 am

2 stops26h 56m

$973

SydneySeattle

SYD - SEA

SYDSEA

Sydney Kingsford Smith

Sun 5/31

9:30 am-2:55 pm

1 stop22h 25m

Seattle/Tacoma Intl

Fri 6/26

12:10 am-7:30 am

1 stop38h 20m

$979

SydneySeattle

SYD - SEA

SYDSEA

Sydney Kingsford Smith

Fri 3/6

10:20 am-1:55 pm

1 stop22h 35m

Seattle/Tacoma Intl

Mon 3/16

12:10 am-8:20 am

1 stop38h 10m

$981

SydneySeattle

SYD - SEA

SYDSEA

Sydney Kingsford Smith

Wed 4/15

1:15 pm-6:47 pm

2 stops22h 32m

Seattle/Tacoma Intl

Fri 5/15

5:59 pm-11:45 am

2 stops24h 46m

$998

SydneySeattle

SYD - SEA

SYDSEA

Sydney Kingsford Smith

Fri 1/30

2:00 pm-4:47 pm

2 stops21h 47m

Seattle/Tacoma Intl

Fri 2/6

5:59 pm-12:35 pm

2 stops23h 36m

$1,000

SydneySeattle

SYD - SEA

SYDSEA

Sydney Kingsford Smith

Sat 1/31

9:55 pm-12:29 pm

2 stops33h 34m

Seattle/Tacoma Intl

Sat 2/7

12:59 pm-1:55 pm

2 stops29h 56m

$1,002

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 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 $908. If you don’t want to visit Seattle in August, then you should wait until September to fly from Sydney, when ticket prices are also cheap, with an average price of $952.

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 $1,083 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 $909 on momondo.

Can stopping save me money on Sydney to Seattle flights?

You could potentially save up to 6% on your flight if you consider stops on a Sydney to Seattle flight.

How have Sydney to Seattle flight prices changed over time?

As of December 2025, prices for Sydney to Seattle flights are approximately 55% 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

Fastest flight time

18h 30m

Direct flights

None
The fastest flight from Sydney to Seattle takes 18h 30m
There are no direct flights from Sydney to Seattle. There are no popular flight routes from Sydney to Seattle.
Search flight deals

  • 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 18h 30m, 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
10,534 reviews
Search Air Canada flights
United AirlinesPriceFrom $794Free CancellationRating
7.4
9,095 reviews
Search United Airlines flights
DeltaPriceFrom $802Free CancellationRating
7.9
8,008 reviews
Search Delta flights
Hawaiian AirlinesPriceFrom $917Free CancellationRating
7.8
2,820 reviews
Search Hawaiian Airlines flights

Traveling to a place near Seattle?

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

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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