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Cheap flights from Seattle to Sydney from $549

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Seattle to Sydney departing on 9/4. 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 Seattle to Sydney

Cheap return flights

These are some of the best return flight deals from Seattle to Sydney that have been recently found on momondo from popular airlines, departing in the coming months.

Cheap one-way flights

Flying one-way? These are some of the best deals recently discovered on momondo for flights from Seattle to Sydney.

Cheap last-minute flights

Planning a quick getaway from Seattle to Sydney? These are the last-minute flight deals available now.

Cheap direct flights

If you prefer a non-stop journey, check out our latest direct flight deals to Sydney, so you can enjoy a seamless trip without stopovers.

Cheap bus & train deals from Seattle to Sydney

Find recent round-trip train or bus tickets from Seattle to Sydney.

All round-trip flight deals to Sydney

The cheapest plane tickets to Sydney found on KAYAK recently.
18:31 - 15:35SEA-SYD
26h 04m1 stop
17:25 - 21:20SYD-SEA
22h 55m1 stop
$1,343
Find Deal
Thu, 20 Feb - Fri, 28 Feb
10:35 - 09:35SEA-SYD
28h 00m1 stop
11:20 - 14:30SYD-SEA
22h 10m1 stop
$1,351Air Canada
Find Deal
Wed, 5 Feb - Tue, 4 Mar
15:05 - 09:35SEA-SYD
23h 30m1 stop
11:20 - 14:30SYD-SEA
22h 10m1 stop
$1,354Air Canada
Find Deal
Wed, 5 Feb - Mon, 24 Feb
07:00 - 19:45SEA-SYD
17h 45m1 stop
21:40 - 21:20SYD-SEA
18h 40m1 stop
$1,545Hawaiian Airlines
Find Deal
Thu, 30 Jan - Tue, 11 Feb
23:35 - 09:30SEA-SYD
39h 55m1 stop
11:35 - 19:35SYD-SEA
26h 00m1 stop
$1,547Philippine Airlines
Find Deal
Sun, 23 Mar - Wed, 2 Apr
07:00 - 19:45SEA-SYD
17h 45m1 stop
21:40 - 21:25SYD-SEA
17h 45m1 stop
$1,592Hawaiian Airlines
Find Deal
Fri, 7 Mar - Sun, 16 Mar
22:35 - 09:30SEA-SYD
39h 55m1 stop
11:10 - 19:10SYD-SEA
26h 00m1 stop
$1,596Philippine Airlines
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Fri, 7 Mar - Sun, 16 Mar
17:38 - 08:45SEA-SYD
22h 07m2 stops
08:45 - 18:17SYD-SEA
26h 32m2 stops
$1,787Air New Zealand
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Tue, 20 May - Tue, 17 Jun
12:50 - 09:15SEA-SYD
25h 25m1 stop
12:10 - 16:00SYD-SEA
22h 50m1 stop
$1,851United Airlines
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Tue, 28 Jan - Sun, 2 Mar
09:20 - 09:05SEA-SYD
28h 45m2 stops
11:50 - 00:55SYD-SEA
32h 05m3 stops
$1,863United Airlines
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Wed, 5 Feb - Mon, 17 Feb
18:30 - 14:40SEA-SYD
27h 10m1 stop
Wed, 9 Apr
13:55 - 15:40SEA-SYD
31h 45m1 stop
Wed, 2 Apr
10:05 - 15:40SEA-SYD
35h 35m2 stops
Sun, 30 Mar
09:25 - 07:35SEA-SYD
28h 10m1 stop
$941Delta
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Mon, 31 Mar
10:00 - 07:35SEA-SYD
27h 35m2 stops
$942Delta
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Wed, 26 Mar
17:25 - 09:05SEA-SYD
20h 40m1 stop
$1,039United Airlines
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Tue, 4 Feb
10:35 - 18:05SEA-SYD
36h 30m2 stops
$1,043Air Canada
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Sun, 12 Jan
07:00 - 19:45SEA-SYD
17h 45m1 stop
$1,046Alaska Airlines
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Mon, 3 Mar
16:58 - 07:00SEA-SYD
43h 02m3 stops
$1,049United Airlines
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Sat, 15 Feb
21:44 - 19:45SEA-SYD
27h 01m2 stops
$1,632Alaska Airlines
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Fri, 27 Dec
19:15 - 09:35SEA-SYD
19h 20m1 stop
11:20 - 09:50SYD-SEA
17h 30m1 stop
$1,564Air Canada
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Sun, 8 Dec - Thu, 12 Dec
19:15 - 21:45SEA-SYD
31h 30m2 stops
11:20 - 18:25SYD-SEA
26h 05m1 stop
$1,659Air Canada
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Sun, 8 Dec - Thu, 12 Dec
19:35 - 19:45SEA-SYD
29h 10m1 stop
21:40 - 21:25SYD-SEA
18h 45m1 stop
$1,912Alaska Airlines
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Wed, 4 Dec - Sat, 14 Dec
14:13 - 08:35SEA-SYD
23h 22m1 stop
11:05 - 00:24SYD-SEA
32h 19m1 stop
$2,085Delta
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Wed, 4 Dec - Thu, 19 Dec
09:30 - 08:35SEA-SYD
28h 05m2 stops
11:05 - 00:24SYD-SEA
32h 19m1 stop
$2,093Delta
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Wed, 4 Dec - Thu, 19 Dec
19:35 - 19:45SEA-SYD
29h 10m1 stop
21:40 - 07:03SYD-SEA
28h 23m2 stops
$2,178Alaska Airlines
Find Deal
Wed, 4 Dec - Sat, 14 Dec
05:15 - 12:30SEA-SYD
36h 15m2 stops
17:25 - 21:20SYD-SEA
22h 55m1 stop
$2,213
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Sun, 8 Dec - Mon, 13 Jan
07:00 - 15:35SEA-SYD
37h 35m1 stop
17:25 - 21:20SYD-SEA
22h 55m1 stop
$2,304
Find Deal
Sun, 8 Dec - Mon, 13 Jan
09:25 - 09:05SEA-SYD
28h 40m2 stops
11:20 - 15:25SYD-SEA
23h 05m2 stops
$2,403United Airlines
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Wed, 4 Dec - Thu, 19 Dec
23:59 - 07:00SEA-SYD
36h 01m1 stop
16:15 - 21:20SYD-SEA
24h 05m1 stop
$2,491United Airlines
Find Deal
Sat, 7 Dec - Fri, 10 Jan

Philippine Airlines flights from Seattle to Sydney

Our best Philippine Airlines deals on Seattle to Sydney flight tickets
Philippine Airlines
23 Mar
SEA23:35Seattle/Tacoma Intl
39h 55m
1 stop
SYD09:30Sydney Kingsford Smith
2 Apr
SYD11:35Sydney Kingsford Smith
26h 00m
1 stop
SEA19:35Seattle/Tacoma Intl
Philippine Airlines
7 Mar
SEA22:35Seattle/Tacoma Intl
39h 55m
1 stop
SYD09:30Sydney Kingsford Smith
16 Mar
SYD11:10Sydney Kingsford Smith
26h 00m
1 stop
SEA19:10Seattle/Tacoma Intl

Air Canada flights from Seattle to Sydney

Our best Air Canada deals on Seattle to Sydney flight tickets
Air Canada
5 Feb
SEA10:35Seattle/Tacoma Intl
28h 00m
1 stop
SYD09:35Sydney Kingsford Smith
4 Mar
SYD11:20Sydney Kingsford Smith
22h 10m
1 stop
SEA14:30Seattle/Tacoma Intl
Air Canada
5 Feb
SEA15:05Seattle/Tacoma Intl
23h 30m
1 stop
SYD09:35Sydney Kingsford Smith
24 Feb
SYD11:20Sydney Kingsford Smith
22h 10m
1 stop
SEA14:30Seattle/Tacoma Intl
Air Canada
5 Feb
SEA10:35Seattle/Tacoma Intl
28h 00m
1 stop
SYD09:35Sydney Kingsford Smith
17 Feb
SYD11:20Sydney Kingsford Smith
22h 10m
1 stop
SEA14:30Seattle/Tacoma Intl

See travel insights to Sydney from

How to get the cheapest flight ticket from Seattle to Sydney

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 Seattle and Sydney?

What is the cheapest month to fly to Sydney?

The month of February is, on average, the cheapest month to fly to Sydney from Seattle, with most prices found around $1,524. If you aren’t able to travel to Sydney during the month of February, then flying in March is also cheap. Prices for this month can be found on momondo for an average of $1,527.

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

Our data shows that Monday is the least expensive day to fly to Sydney. Tickets to fly out on this day can be as low as $0. The most expensive day to fly to Sydney is Saturday, with ticket prices averaging around $1,802.

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

According to our data, the cheapest time of day to fly to Sydney is at midday. momondo users have found flights departing from Seattle to Sydney at midday for as low as $0. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. If you have a flexible travel schedule, then try to avoid flying in the morning when prices are $1,747 on average. Flights to Sydney from Seattle in the morning are generally more expensive because this time of day is more convenient for travellers’ schedules.

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

We recommend purchasing flights from Seattle to Sydney 31 days ahead of your departure date because this is when momondo users tend to see the best flight rates. On average, our users have found flights to Sydney for $1,692. However, in the past 72 hours, people saw flights from Seattle for as low as $2,057.

Can stopping save me money on Seattle to Sydney flights?

You could potentially save up to 4% on your flight if you consider stops on a Seattle to Sydney flight.

How have Seattle to Sydney flight prices changed over time?

As of December 2024, prices for Seattle to Sydney flights are approximately 19% cheaper when compared to flights at the same time last year.

When to book flights from Seattle to Sydney

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

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

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

Best price found

$549

Fastest flight time

17h 45m

Direct flights

None

Airports in Sydney

1 airport
The best one-way flight to Sydney from Seattle in the past 72 hours is $549. The best return flight deal from Seattle to Sydney found on momondo in the last 72 hours is $1,343.
The fastest flight from Seattle to Sydney takes 17h 45m
There are no direct flights from Seattle to Sydney. Popular non-direct route for this connection is Seattle/Tacoma Intl Airport - Sydney Kingsford Smith Airport.
There is 1 airport near Sydney: Sydney Kingsford Smith (SYD)

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

    Seattle/Tacoma Intl and Sydney Kingsford Smith are 12462.2 km apart from one another. In terms of flight time, this usually takes a little over 17h 45m.

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

    Prices for flights from Seattle/Tacoma Intl Airport to Sydney Kingsford Smith Airport refresh daily.

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

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

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and stopovers. It is recommended that you verify with the airline you are booking with for travel from Seattle/Tacoma Intl Airport to Sydney Kingsford Smith Airport.

  • What documentation or ID do you need to fly to Sydney Kingsford Smith Airport?

    The required travel and health documents for your Sydney Kingsford Smith 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 licence and a passport valid for six months after your intended arrival at Sydney Kingsford Smith Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

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


Best airlines flying from Seattle to Sydney

Compare and see reviews for airlines that fly from Seattle to Sydney with momondo
Airline
Rating
Free cancellation
Price
United AirlinesPriceFrom $1,163Free cancellationRating
7.4
9,141 reviews
Search United Airlines flights
Air CanadaPriceFrom $1,234Free cancellationRating
7.0
8,293 reviews
Search Air Canada flights

Why use momondo?

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

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 Seattle to Sydney for you.

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

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

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

Once you have performed a search for Seattle to Sydney flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

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

Of course. momondo tracks the price of Seattle to Sydney flights. All you need is a valid email address and we will do the rest; it is that quick and easy.


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