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Cheap flights from Seattle to Sydney from $447

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 4/3. 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 round-trip flights

These are some of the best round-trip 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 layovers.

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.
6:31 pm - 3:35 pmSEA-SYD
26h 04m1 stop
5:25 pm - 8:25 pmSYD-SEA
21h 00m2 stops
Sun, Mar 2 - Mon, Mar 10
3:05 pm - 9:35 amSEA-SYD
23h 30m1 stop
10:20 am - 6:25 pmSYD-SEA
26h 05m1 stop
$876Air Canada
Find Deal
Wed, Mar 5 - Wed, Mar 19
7:05 pm - 9:35 amSEA-SYD
19h 30m1 stop
9:15 pm - 8:50 amSYD-SEA
30h 35m2 stops
Wed, Mar 5 - Sat, Mar 8
2:00 pm - 8:35 amSEA-SYD
23h 35m1 stop
11:05 am - 8:44 pmSYD-SEA
28h 39m1 stop
$1,121Delta
Find Deal
Tue, Jan 28 - Mon, Feb 24
11:45 am - 8:35 amSEA-SYD
25h 50m1 stop
11:05 am - 12:58 pmSYD-SEA
20h 53m1 stop
$1,122Delta
Find Deal
Sun, Jan 26 - Wed, Feb 26
9:20 am - 9:15 amSEA-SYD
28h 55m1 stop
12:10 pm - 11:12 amSYD-SEA
18h 02m1 stop
$1,136United Airlines
Find Deal
Mon, Jan 27 - Mon, Mar 3
7:00 am - 7:45 pmSEA-SYD
17h 45m1 stop
9:40 pm - 9:00 pmSYD-SEA
18h 20m1 stop
$1,140Hawaiian Airlines
Find Deal
Thu, Feb 20 - Sat, Mar 8
3:25 pm - 6:20 amSEA-SYD
19h 55m1 stop
12:10 pm - 11:20 amSYD-SEA
18h 10m1 stop
$1,144United Airlines
Find Deal
Fri, Jan 31 - Thu, Feb 6
7:00 am - 7:45 pmSEA-SYD
17h 45m1 stop
9:40 pm - 9:20 pmSYD-SEA
18h 40m1 stop
$1,156Alaska Airlines
Find Deal
Wed, Mar 5 - Fri, Mar 7
8:15 am - 7:45 pmSEA-SYD
18h 30m1 stop
9:40 pm - 6:15 amSYD-SEA
25h 35m1 stop
$1,209Hawaiian Airlines
Find Deal
Fri, Jun 13 - Sun, Jun 22
6:40 pm - 3:40 pmSEA-SYD
27h 00m1 stop
Thu, Apr 3
6:50 pm - 2:40 pmSEA-SYD
26h 50m1 stop
Sun, Apr 6
9:50 pm - 10:15 pmSEA-SYD
54h 25m3 stops
Mon, Mar 31
7:05 pm - 8:35 amSEA-SYD
19h 30m1 stop
$594Air Canada
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Wed, Mar 26
4:30 pm - 9:15 amSEA-SYD
21h 45m1 stop
$597United Airlines
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Tue, Dec 24
10:00 am - 7:35 amSEA-SYD
27h 35m2 stops
$598Delta
Find Deal
Wed, Mar 26
3:11 pm - 6:20 amSEA-SYD
20h 09m1 stop
$599United Airlines
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Wed, Jan 1
7:05 pm - 9:45 pmSEA-SYD
31h 40m2 stops
$654Air Canada
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Sat, Jan 18
7:00 am - 7:45 pmSEA-SYD
17h 45m1 stop
$981Hawaiian Airlines
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Wed, Jan 15
7:00 am - 7:45 pmSEA-SYD
17h 45m1 stop
$987Hawaiian Airlines
Find Deal
Mon, Jan 13
11:59 pm - 7:00 amSEA-SYD
36h 01m1 stop
12:10 pm - 9:15 pmSYD-SEA
28h 05m1 stop
$1,648United Airlines
Find Deal
Sun, Dec 22 - Fri, Jan 3
11:59 pm - 7:00 amSEA-SYD
36h 01m1 stop
11:20 am - 3:25 pmSYD-SEA
23h 05m2 stops
$1,678United Airlines
Find Deal
Sun, Dec 22 - Mon, Dec 30
11:59 pm - 7:00 amSEA-SYD
36h 01m1 stop
11:20 am - 11:50 pmSYD-SEA
31h 30m2 stops
$1,763United Airlines
Find Deal
Sun, Dec 22 - Fri, Jan 3
11:59 pm - 7:00 amSEA-SYD
36h 01m1 stop
12:10 pm - 2:15 pmSYD-SEA
21h 05m1 stop
$1,937United Airlines
Find Deal
Sat, Dec 21 - Sun, Dec 29
4:30 pm - 9:15 amSEA-SYD
21h 45m1 stop
7:15 pm - 10:00 pmSYD-SEA
45h 45m2 stops
$2,711Air New Zealand
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Sun, Dec 22 - Tue, Jan 7
5:00 am - 9:15 amSEA-SYD
33h 15m1 stop
1:55 pm - 10:00 pmSYD-SEA
27h 05m2 stops
$2,722Air New Zealand
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Fri, Dec 20 - Sun, Dec 22
7:15 pm - 9:45 pmSEA-SYD
31h 30m2 stops
9:00 am - 9:50 amSYD-SEA
19h 50m2 stops
$3,069Air Canada
Find Deal
Mon, Dec 23 - Fri, Jan 3
8:35 am - 7:45 pmSEA-SYD
40h 10m1 stop
9:40 pm - 5:10 amSYD-SEA
26h 30m1 stop
$4,045Hawaiian Airlines
Find Deal
Fri, Dec 20 - Sat, Jan 4
10:35 am - 9:35 amSEA-SYD
28h 00m1 stop
11:20 am - 2:30 pmSYD-SEA
22h 10m1 stop
$10,026Air Canada
Find Deal
Mon, Dec 23 - Fri, Jan 3
12:55 am - 6:35 amSEA-SYD
34h 40m1 stop
5:25 pm - 11:39 pmSYD-SEA
25h 14m1 stop
$18,930American Airlines
Find Deal
Fri, Dec 20 - Fri, Jan 3

Air Canada flights from Seattle to Sydney

Our best Air Canada deals on Seattle to Sydney flight tickets
Air Canada
Mar 5
SEA3:05 pmSeattle/Tacoma Intl
23h 30m
1 stop
SYD9:35 amSydney Kingsford Smith
Mar 19
SYD10:20 amSydney Kingsford Smith
26h 05m
1 stop
SEA6:25 pmSeattle/Tacoma Intl
Air Canada
Feb 5
SEA5:45 amSeattle/Tacoma Intl
32h 50m
1 stop
SYD9:35 amSydney Kingsford Smith
Feb 25
SYD9:00 amSydney Kingsford Smith
19h 50m
2 stops
SEA9:50 amSeattle/Tacoma Intl
Air Canada
Mar 2
SEA7:05 pmSeattle/Tacoma Intl
26h 35m
2 stops
SYD4:40 pmSydney Kingsford Smith
Mar 9
SYD11:20 amSydney Kingsford Smith
28h 40m
1 stop
SEA9:00 pmSeattle/Tacoma Intl

Delta flights from Seattle to Sydney

Our best Delta deals on Seattle to Sydney flight tickets
Delta
Jan 28
SEA2:00 pmSeattle/Tacoma Intl
23h 35m
1 stop
SYD8:35 amSydney Kingsford Smith
Feb 24
SYD11:05 amSydney Kingsford Smith
28h 39m
1 stop
SEA8:44 pmSeattle/Tacoma Intl
Delta
Jan 26
SEA11:45 amSeattle/Tacoma Intl
25h 50m
1 stop
SYD8:35 amSydney Kingsford Smith
Feb 26
SYD11:05 amSydney Kingsford Smith
20h 53m
1 stop
SEA12:58 pmSeattle/Tacoma Intl
Delta
Mar 5
SEA1:30 pmSeattle/Tacoma Intl
24h 05m
2 stops
SYD8:35 amSydney Kingsford Smith
Mar 12
SYD10:05 amSydney Kingsford Smith
20h 55m
1 stop
SEA1:00 pmSeattle/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 cheapest month to fly to Sydney?

In general, March is the cheapest month to fly from Seattle to Sydney. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $991. If you are unable to visit Sydney during the month of March, then departing from Seattle during the month April is also very affordable. Most momondo users find prices during this month for around $1,015.

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

The cheapest day to depart from Seattle to Sydney is on a Tuesday when prices can be found for as low as $1,078. The most expensive day to fly to Sydney is Thursday, with ticket prices averaging around $1,156.

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 in the evening. momondo users have found flights departing from Seattle to Sydney in the evening for as low as $1,078. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights to Sydney are more costly in the morning, with an average ticket price of $1,152. Departure times in the morning 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 Sydney?

The ideal time to book your flight to Sydney is 37 days in advance when prices tend to average $1,123. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Sydney from Seattle for as low as $760 on momondo.

Can stopping save me money on Seattle to Sydney flights?

You could potentially save up to 5% 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 round-trip 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

$447

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 $447. The best round-trip flight deal from Seattle to Sydney found on momondo in the last 72 hours is $866.
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?

    Sydney Kingsford Smith is 7743.7 mi away from Seattle/Tacoma Intl. 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 are updated 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?

    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 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 license 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 $759Free CancellationRating
7.4
9,059 reviews
Search United Airlines flights
ANAPriceFrom $767Free CancellationRating
8.4
839 reviews
Search ANA flights
Air CanadaPriceFrom $796Free CancellationRating
7.0
8,382 reviews
Search Air Canada flights
Qantas AirwaysPriceFrom $836Free CancellationRating
7.5
808 reviews
Search Qantas Airways flights
DeltaPriceFrom $838Free CancellationRating
8.0
8,604 reviews
Search Delta flights
Alaska AirlinesPriceFrom $839Free CancellationRating
8.0
9,552 reviews
Search Alaska Airlines flights
Hawaiian AirlinesPriceFrom $881Free CancellationRating
7.9
2,295 reviews
Search Hawaiian Airlines flights
American AirlinesPriceFrom $941Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
Air New ZealandPriceFrom $1,202Free CancellationRating
7.9
497 reviews
Search Air New Zealand flights

Why use momondo?

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

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

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

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

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

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 Sydney from Seattle.

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

Yes. momondo can track prices for Seattle to Sydney 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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