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Cheap flights from Sydney to Seattle from $643

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 15/10. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult

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Cheap return flights

Air Canada Logo
10:20 - 09:21SYD-SEA
17h 01m1 stop
Air Canada Logo
05:50 - 08:35SEA-SYD
32h 45m1 stop
$1,127Air Canada
Find Deal
Fri, 10 Oct - Sun, 26 Oct
Air Canada Logo
10:20 - 19:16SYD-SEA
26h 56m1 stop
Air Canada Logo
10:05 - 09:35SEA-SYD
28h 30m1 stop
$1,130Air Canada
Find Deal
Sun, 26 Oct - Tue, 11 Nov
Air Canada Logo
10:20 - 09:21SYD-SEA
17h 01m1 stop
Air Canada Logo
15:40 - 08:35SEA-SYD
22h 55m1 stop
$1,144Air Canada
Find Deal
Fri, 17 Oct - Sun, 26 Oct
Hawaiian Airlines Logo
21:40 - 23:32SYD-SEA
19h 52m1 stop
Hawaiian Airlines Logo
07:00 - 19:45SEA-SYD
17h 45m1 stop
$1,217Hawaiian Airlines
Find Deal
Thu, 30 Oct - Thu, 6 Nov
Qantas Airways Logo
10:10 - 20:07SYD-SEA
27h 57m1 stop
Qantas Airways Logo
17:30 - 09:00SEA-SYD
20h 30m1 stop
$1,225Qantas Airways
Find Deal
Fri, 24 Oct - Sun, 2 Nov
Hawaiian Airlines Logo
21:40 - 23:32SYD-SEA
19h 52m1 stop
Hawaiian Airlines Logo
07:00 - 19:45SEA-SYD
17h 45m1 stop
$1,238Hawaiian Airlines
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Fri, 31 Oct - Fri, 7 Nov
United Airlines Logo
11:20 - 12:02SYD-SEA
18h 42m1 stop
United Airlines Logo
17:07 - 09:05SEA-SYD
21h 58m1 stop
$1,261United Airlines
Find Deal
Fri, 10 Oct - Sun, 26 Oct
United Airlines Logo
10:30 - 19:16SYD-SEA
26h 46m2 stops
United Airlines Logo
08:36 - 07:00SEA-SYD
27h 24m2 stops
$1,276United Airlines
Find Deal
Wed, 15 Oct - Wed, 19 Nov
Qantas Airways Logo
10:10 - 23:01SYD-SEA
30h 51m1 stop
Qantas Airways Logo
06:05 - 09:00SEA-SYD
31h 55m1 stop
$1,315Qantas Airways
Find Deal
Sat, 18 Oct - Thu, 20 Nov
Delta Logo
10:40 - 22:23SYD-SEA
30h 43m2 stops
Delta Logo
11:15 - 08:30SEA-SYD
26h 15m2 stops
$1,372Delta
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Fri, 7 Nov - Tue, 11 Nov

Air Canada flights from Sydney to Seattle

Our best Air Canada deals on Sydney to Seattle flight tickets
Air Canada
10 Oct
SYD10:20Sydney Kingsford Smith
17h 01m
1 stop
SEA09:21Seattle/Tacoma Intl
26 Oct
SEA05:50Seattle/Tacoma Intl
32h 45m
1 stop
SYD08:35Sydney Kingsford Smith
$1,127
Find similar
Air Canada
26 Oct
SYD10:20Sydney Kingsford Smith
26h 56m
1 stop
SEA19:16Seattle/Tacoma Intl
11 Nov
SEA10:05Seattle/Tacoma Intl
28h 30m
1 stop
SYD09:35Sydney Kingsford Smith
$1,130
Find similar
Air Canada
17 Oct
SYD10:20Sydney Kingsford Smith
17h 01m
1 stop
SEA09:21Seattle/Tacoma Intl
26 Oct
SEA15:40Seattle/Tacoma Intl
22h 55m
1 stop
SYD08:35Sydney Kingsford Smith
$1,144
Find similar

United Airlines flights from Sydney to Seattle

Our best United Airlines deals on Sydney to Seattle flight tickets
United Airlines
10 Oct
SYD11:20Sydney Kingsford Smith
18h 42m
1 stop
SEA12:02Seattle/Tacoma Intl
26 Oct
SEA17:07Seattle/Tacoma Intl
21h 58m
1 stop
SYD09:05Sydney Kingsford Smith
$1,261
Find similar
United Airlines
15 Oct
SYD10:30Sydney Kingsford Smith
26h 46m
2 stops
SEA19:16Seattle/Tacoma Intl
19 Nov
SEA08:36Seattle/Tacoma Intl
27h 24m
2 stops
SYD07:00Sydney Kingsford Smith
$1,276
Find similar
United Airlines
25 Oct
SYD10:30Sydney Kingsford Smith
23h 02m
2 stops
SEA15:32Seattle/Tacoma Intl
3 Nov
SEA17:20Seattle/Tacoma Intl
20h 55m
1 stop
SYD09:15Sydney Kingsford Smith
$1,277
Find similar

momondo Fare Finder

 
Customise 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 78,305 searches. Data last updated 18 September 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

10:20-09:21

1 stop17h 01m

Seattle/Tacoma Intl

Sun 26/10

05:50-08:35

1 stop32h 45m

$1,127

SydneySeattle

SYD - SEA

SYDSEA

Sydney Kingsford Smith

Sun 26/10

10:20-19:16

1 stop26h 56m

Seattle/Tacoma Intl

Tue 11/11

10:05-09:35

1 stop28h 30m

$1,130

SydneySeattle

SYD - SEA

SYDSEA

Sydney Kingsford Smith

Fri 17/10

10:20-09:21

1 stop17h 01m

Seattle/Tacoma Intl

Sun 26/10

15:40-08:35

1 stop22h 55m

$1,144

SydneySeattle

SYD - SEA

SYDSEA

Sydney Kingsford Smith

Thu 30/10

21:40-23:32

1 stop19h 52m

Seattle/Tacoma Intl

Thu 6/11

07:00-19:45

1 stop17h 45m

$1,217

SydneySeattle

SYD - SEA

SYDSEA

Sydney Kingsford Smith

Fri 24/10

10:10-20:07

1 stop27h 57m

Seattle/Tacoma Intl

Sun 2/11

17:30-09:00

1 stop20h 30m

$1,225

SydneySeattle

SYD - SEA

SYDSEA

Sydney Kingsford Smith

Fri 31/10

21:40-23:32

1 stop19h 52m

Seattle/Tacoma Intl

Fri 7/11

07:00-19:45

1 stop17h 45m

$1,238

SydneySeattle

SYD - SEA

SYDSEA

Sydney Kingsford Smith

Fri 10/10

11:20-12:02

1 stop18h 42m

Seattle/Tacoma Intl

Sun 26/10

17:07-09:05

1 stop21h 58m

$1,261

SydneySeattle

SYD - SEA

SYDSEA

Sydney Kingsford Smith

Wed 15/10

10:30-19:16

2 stops26h 46m

Seattle/Tacoma Intl

Wed 19/11

08:36-07:00

2 stops27h 24m

$1,276

SydneySeattle

SYD - SEA

SYDSEA

Sydney Kingsford Smith

Sat 18/10

10:10-23:01

1 stop30h 51m

Seattle/Tacoma Intl

Thu 20/11

06:05-09:00

1 stop31h 55m

$1,315

SydneySeattle

SYD - SEA

SYDSEA

Sydney Kingsford Smith

Fri 7/11

10:40-22:23

2 stops30h 43m

Seattle/Tacoma Intl

Tue 11/11

11:15-08:30

2 stops26h 15m

$1,372

Flights are sorted by cheapest return 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?

The month of August is, on average, the cheapest month to fly to Seattle from Sydney, with most prices found around $1,412. If you are unable to visit Seattle during the month of August, then departing from Sydney during the month February is also very affordable. Most momondo users find prices during this month for around $1,479.

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

The cheapest day to depart from Sydney to Seattle is on a Thursday. Travellers who choose to depart for Seattle on a Thursday will often find tickets for as low as $1,542. When flying out on a Sunday, the most expensive travel day of the week, you can expect to see flight prices from Sydney to Seattle for around $1,772.

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

According to our data, the cheapest time of day to fly to Seattle is at midday. momondo users have found flights departing from Sydney to Seattle at midday for as low as $1,469. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. In contrast, the most expensive time of day to depart to Seattle is in the afternoon when prices are around $1,793.

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 $1,658 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Seattle from Sydney for as low as $1,340 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 return 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.
Search flight deals

  • How far is Sydney Kingsford Smith to Seattle/Tacoma Intl by plane?

    There are 12462.2 km between Sydney Kingsford Smith and Seattle/Tacoma Intl. A reasonable flight in good conditions will take 17h 01m.

  • 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 refresh daily.

  • 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 that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and stopovers are among the considerations that may influence age limits. We recommend that you double-check 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 necessary travel and health documents for your Seattle/Tacoma Intl Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's licence and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

  • 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
Alaska AirlinesPriceFrom $344Free cancellationRating
8.0
10,000 reviews
Search Alaska Airlines flights
DeltaPriceFrom $1,138Free cancellationRating
7.9
7,961 reviews
Search Delta flights
Air CanadaPriceFrom $1,162Free cancellationRating
7.1
10,000 reviews
Search Air Canada flights
United AirlinesPriceFrom $1,191Free cancellationRating
7.4
8,926 reviews
Search United Airlines flights
Hawaiian AirlinesPriceFrom $1,217Free cancellationRating
7.8
2,729 reviews
Search Hawaiian Airlines flights
Qantas AirwaysPriceFrom $1,242Free cancellationRating
7.5
907 reviews
Search Qantas Airways flights
Philippine AirlinesPriceFrom $1,302Free cancellationRating
7.2
911 reviews
Search Philippine Airlines flights
Air New ZealandPriceFrom $1,345Free cancellationRating
8.0
505 reviews
Search Air New Zealand flights
Virgin AustraliaPriceFrom $1,413Free cancellationRating
7.5
416 reviews
Search Virgin Australia flights
Singapore AirlinesPriceFrom $1,423Free cancellationRating
8.1
1,367 reviews
Search Singapore Airlines flights

Travelling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
Leavenworth
SeaTac

Why use momondo?

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

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

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

momondo does allow users to show only those flights to Seattle from Sydney which offer a flexible booking policy as well as other useful filters and features.

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

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Sydney to Seattle.

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

If you are simply researching potential flights to Seattle, momondo offers a useful price alert feature which will track prices for flights to Seattle from Sydney and alert you when they change.

An easier way to manage your Seattle trip

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