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Cheap flights from Seattle to Sydney from $419

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 3/20. 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.
10:35 am - 7:20 amSEA-SYD
27h 45m1 stop
9:20 am - 9:50 amSYD-SEA
17h 30m1 stop
$831Air Canada
Find Deal
Mon, Apr 7 - Mon, Apr 14
6:15 am - 9:00 amSEA-SYD
31h 45m1 stop
11:15 am - 10:45 pmSYD-SEA
30h 30m1 stop
$842American Airlines
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Thu, Nov 7 - Thu, Nov 21
7:05 pm - 11:25 amSEA-SYD
23h 20m2 stops
9:20 am - 6:25 pmSYD-SEA
26h 05m1 stop
Mon, Apr 7 - Mon, Apr 14
1:55 pm - 9:15 amSEA-SYD
24h 20m1 stop
12:10 pm - 11:44 pmSYD-SEA
30h 34m1 stop
$858United Airlines
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Thu, Nov 7 - Thu, Nov 21
3:20 pm - 9:05 amSEA-SYD
22h 45m2 stops
12:10 pm - 11:50 pmSYD-SEA
30h 40m1 stop
$860United Airlines
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Sat, Nov 9 - Sat, Dec 28
8:20 pm - 8:35 amSEA-SYD
41h 15m1 stop
2:15 pm - 2:29 pmSYD-SEA
19h 14m1 stop
$931Delta
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Fri, Nov 8 - Thu, Dec 26
1:50 pm - 8:35 amSEA-SYD
23h 45m1 stop
11:05 am - 1:00 pmSYD-SEA
20h 55m1 stop
$936Delta
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Fri, Feb 14 - Fri, Feb 21
8:40 am - 9:00 amSEA-SYD
29h 20m2 stops
11:15 am - 2:36 pmSYD-SEA
22h 21m2 stops
$1,054Alaska Airlines
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Fri, Nov 15 - Thu, Nov 21
6:05 pm - 9:00 amSEA-SYD
19h 55m1 stop
11:15 am - 2:50 pmSYD-SEA
22h 35m1 stop
$1,061Alaska Airlines
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Fri, Nov 29 - Wed, Dec 4
3:58 pm - 7:25 amSEA-SYD
20h 27m1 stop
11:15 am - 11:59 pmSYD-SEA
30h 44m1 stop
$1,112Qantas Airways
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Wed, Mar 5 - Mon, Mar 17
9:45 am - 3:35 pmSEA-SYD
35h 50m2 stops
Thu, Mar 20
9:45 am - 3:35 pmSEA-SYD
35h 50m2 stops
Thu, Mar 13
3:05 pm - 8:20 amSEA-SYD
23h 15m1 stop
$605Air Canada
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Mon, Mar 31
7:05 pm - 9:35 amSEA-SYD
19h 30m1 stop
$606Air Canada
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Wed, Feb 26
5:30 am - 8:35 amSEA-SYD
32h 05m2 stops
$628Delta
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Tue, Dec 31
7:00 am - 7:45 pmSEA-SYD
17h 45m1 stop
$650Hawaiian Airlines
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Fri, Feb 28
5:00 am - 9:15 amSEA-SYD
33h 15m2 stops
$655United Airlines
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Mon, Nov 4
12:47 pm - 9:15 amSEA-SYD
49h 28m3 stops
$661United Airlines
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Wed, Nov 20
12:00 pm - 8:35 amSEA-SYD
25h 35m1 stop
$673Delta
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Wed, Jan 15
8:15 am - 7:45 pmSEA-SYD
40h 30m1 stop
$1,081Hawaiian Airlines
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Fri, Jan 3
4:26 pm - 8:00 amSEA-SYD
21h 34m1 stop
11:10 am - 12:53 pmSYD-SEA
43h 43m1 stop
$949United Airlines
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Wed, Oct 23 - Sun, Oct 27
4:58 pm - 7:55 amSEA-SYD
20h 57m1 stop
11:10 am - 11:53 amSYD-SEA
42h 43m1 stop
$1,036United Airlines
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Thu, Oct 24 - Sun, Oct 27
7:40 am - 7:45 pmSEA-SYD
18h 05m1 stop
9:40 pm - 11:30 pmSYD-SEA
19h 50m2 stops
$1,203Hawaiian Airlines
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Thu, Oct 24 - Sat, Oct 26
7:40 am - 7:45 pmSEA-SYD
18h 05m1 stop
9:40 pm - 10:10 pmSYD-SEA
18h 30m1 stop
$1,249Hawaiian Airlines
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Wed, Oct 23 - Fri, Oct 25
7:40 am - 7:45 pmSEA-SYD
18h 05m1 stop
9:40 pm - 10:10 pmSYD-SEA
18h 30m1 stop
$1,281Hawaiian Airlines
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Thu, Oct 24 - Sat, Oct 26
1:45 am - 8:20 amSEA-SYD
36h 35m2 stops
5:20 pm - 10:10 pmSYD-SEA
22h 50m1 stop
$1,453
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Wed, Oct 23 - Sat, Oct 26
10:10 am - 3:40 pmSEA-SYD
35h 30m2 stops
10:10 pm - 7:30 pmSYD-SEA
39h 20m1 stop
$1,515
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Wed, Oct 23 - Fri, Oct 25
1:10 am - 8:20 amSEA-SYD
37h 10m2 stops
11:30 am - 7:15 pmSYD-SEA
25h 45m1 stop
$1,622
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Tue, Oct 22 - Fri, Oct 25
6:00 am - 9:45 amSEA-SYD
33h 45m2 stops
10:20 pm - 8:43 pmSYD-SEA
40h 23m2 stops
$1,940Cathay Pacific
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Wed, Oct 23 - Fri, Oct 25
7:05 pm - 8:20 amSEA-SYD
19h 15m1 stop
10:20 am - 9:57 amSYD-SEA
41h 37m1 stop
$3,406Air Canada
Find Deal
Wed, Oct 23 - Sat, Oct 26

Air Canada flights from Seattle to Sydney

Our best Air Canada deals on Seattle to Sydney flight tickets
Air Canada
Apr 7
SEA10:35 amSeattle/Tacoma Intl
27h 45m
1 stop
SYD7:20 amSydney Kingsford Smith
Apr 14
SYD9:20 amSydney Kingsford Smith
17h 30m
1 stop
SEA9:50 amSeattle/Tacoma Intl
Air Canada
Nov 10
SEA10:35 amSeattle/Tacoma Intl
28h 00m
1 stop
SYD9:35 amSydney Kingsford Smith
Nov 26
SYD9:00 amSydney Kingsford Smith
28h 32m
2 stops
SEA6:32 pmSeattle/Tacoma Intl
Air Canada
Mar 5
SEA7:05 pmSeattle/Tacoma Intl
23h 35m
2 stops
SYD1:40 pmSydney Kingsford Smith
Mar 18
SYD10:20 amSydney Kingsford Smith
17h 30m
1 stop
SEA9:50 amSeattle/Tacoma Intl

American Airlines flights from Seattle to Sydney

Our best American Airlines deals on Seattle to Sydney flight tickets
American Airlines
Nov 7
SEA6:15 amSeattle/Tacoma Intl
31h 45m
1 stop
SYD9:00 amSydney Kingsford Smith
Nov 21
SYD11:15 amSydney Kingsford Smith
30h 30m
1 stop
SEA10:45 pmSeattle/Tacoma Intl
American Airlines
Nov 6
SEA7:14 pmSeattle/Tacoma Intl
18h 46m
1 stop
SYD9:00 amSydney Kingsford Smith
Nov 21
SYD11:15 amSydney Kingsford Smith
26h 29m
1 stop
SEA6:44 pmSeattle/Tacoma Intl
American Airlines
Nov 11
SEA6:15 amSeattle/Tacoma Intl
31h 45m
1 stop
SYD9:00 amSydney Kingsford Smith
Nov 24
SYD11:15 amSydney Kingsford Smith
30h 30m
1 stop
SEA10:45 pmSeattle/Tacoma Intl

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 from Seattle to Sydney?

March. The cheapest time of year to fly to Sydney from Seattle is March. Most expensive is December

What is the cheapest day to depart Seattle for Sydney?

Tuesday. The cheapest day of the week is typically Tuesday. The most expensive is typically Thursday

When is the cheapest time to fly from Seattle to Sydney?

In the evening. Seattle to Sydney flights are approximately 7% more expensive in the afternoon than in the evening

What is the cheapest airline that flies to Sydney from Seattle?

United Airlines. United Airlines, Air Canada, and Hawaiian Airlines are the most popular carriers operating from Seattle to Sydney

What is the cheapest Seattle to Sydney flight route?

Seattle/Tacoma Intl - Sydney Kingsford Smith. Fly from Seattle/Tacoma Intl to Sydney Kingsford Smith for the best Seattle - Sydney flight prices

How far in advance should you book Seattle to Sydney flights?

31 days before. The cheapest time to buy a flight from Seattle to Sydney is approximately 31 days to departure

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 October 2024, prices for Seattle to Sydney flights are approximately 14% 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

$419

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 $419. The best round-trip flight deal from Seattle to Sydney found on momondo in the last 72 hours is $831.
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 18h 46m.

  • 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
9,302 reviews
Search United Airlines flights
Air CanadaPriceFrom $796Free CancellationRating
7.0
7,987 reviews
Search Air Canada flights
DeltaPriceFrom $832Free CancellationRating
8.0
8,892 reviews
Search Delta flights
Qantas AirwaysPriceFrom $856Free CancellationRating
7.5
837 reviews
Search Qantas Airways flights
American AirlinesPriceFrom $884Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
Hawaiian AirlinesPriceFrom $889Free CancellationRating
7.9
2,309 reviews
Search Hawaiian Airlines flights
Alaska AirlinesPriceFrom $920Free CancellationRating
8.0
9,416 reviews
Search Alaska Airlines flights
ANAPriceFrom $1,139Free CancellationRating
8.4
829 reviews
Search ANA flights
Air New ZealandPriceFrom $1,232Free CancellationRating
8.0
541 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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