Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

Cheap flights from Seattle to Sydney from $376

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 3/30. 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
0 bags

Deals available from 900+ travel sites.

"This year, momondo is the #1 place for airfares on the internet."
Save money when you book flights with momondo
Big names and deals
Big names and deals
Search 100s of travel sites to compare prices.
Filter for what you want
Filter for what you want
Free Wi-Fi? Stopover? Instantly customize your results.
Trusted and free
Trusted and free
We’re completely free to use - no hidden charges or fees.
Price Alerts
Price Alerts
Not ready to book? to track prices.

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.
7:00 am - 7:45 pmSEA-SYD
17h 45m1 stop
9:40 pm - 9:25 pmSYD-SEA
17h 45m1 stop
$830Hawaiian Airlines
Find Deal
Fri, Mar 7 - Sun, Mar 16
7:00 am - 7:45 pmSEA-SYD
17h 45m1 stop
9:40 pm - 9:20 pmSYD-SEA
18h 40m1 stop
$839Alaska Airlines
Find Deal
Fri, Jan 31 - Fri, Feb 7
7:00 am - 7:45 pmSEA-SYD
17h 45m1 stop
9:40 pm - 11:30 pmSYD-SEA
20h 50m1 stop
$846Alaska Airlines
Find Deal
Wed, Feb 5 - Sat, Feb 8
7:05 pm - 8:20 amSEA-SYD
19h 15m1 stop
9:20 am - 9:50 amSYD-SEA
17h 30m1 stop
$938Air Canada
Find Deal
Wed, Apr 2 - Thu, Apr 17
7:05 pm - 8:20 amSEA-SYD
19h 15m1 stop
7:00 am - 9:50 amSYD-SEA
19h 50m2 stops
$954Air Canada
Find Deal
Sat, Mar 29 - Sat, Apr 19
7:04 pm - 9:00 amSEA-SYD
18h 56m1 stop
11:15 am - 12:02 pmSYD-SEA
18h 47m1 stop
$976American Airlines
Find Deal
Thu, Feb 27 - Mon, Mar 10
5:15 pm - 9:15 amSEA-SYD
21h 00m1 stop
11:50 am - 12:55 amSYD-SEA
32h 05m3 stops
$986United Airlines
Find Deal
Wed, Feb 5 - Tue, Mar 4
7:00 am - 7:00 amSEA-SYD
29h 00m2 stops
4:15 pm - 6:29 pmSYD-SEA
21h 14m1 stop
$991United Airlines
Find Deal
Sat, Feb 8 - Tue, Feb 25
1:30 pm - 6:50 amSEA-SYD
22h 20m2 stops
11:05 am - 12:58 pmSYD-SEA
20h 53m1 stop
$1,053Delta
Find Deal
Sat, Feb 1 - Fri, Feb 7
10:35 am - 6:35 amSEA-SYD
27h 00m1 stop
9:25 am - 8:25 pmSYD-SEA
28h 00m1 stop
$1,057Delta
Find Deal
Tue, Apr 8 - Tue, Apr 22
10:05 am - 3:40 pmSEA-SYD
35h 35m2 stops
Sun, Mar 30
7:00 am - 7:45 pmSEA-SYD
17h 45m1 stop
$385Hawaiian Airlines
Find Deal
Wed, Feb 19
7:35 pm - 7:45 pmSEA-SYD
29h 10m1 stop
$398Alaska Airlines
Find Deal
Tue, Dec 3
4:05 pm - 7:45 pmSEA-SYD
32h 40m1 stop
$465Alaska Airlines
Find Deal
Tue, Feb 11
7:05 pm - 8:20 amSEA-SYD
19h 15m1 stop
$530Air Canada
Find Deal
Mon, Mar 31
3:05 pm - 8:35 amSEA-SYD
23h 30m1 stop
$532Air Canada
Find Deal
Sun, Mar 23
10:00 am - 7:35 amSEA-SYD
27h 35m2 stops
$582Delta
Find Deal
Mon, Mar 31
9:40 am - 8:35 amSEA-SYD
27h 55m1 stop
$589Delta
Find Deal
Wed, Dec 4
6:15 am - 9:15 amSEA-SYD
32h 00m3 stops
$680United Airlines
Find Deal
Wed, Feb 26
6:15 am - 9:15 amSEA-SYD
32h 00m3 stops
$745United Airlines
Find Deal
Thu, Feb 20
7:41 pm - 7:45 pmSEA-SYD
29h 04m1 stop
9:45 pm - 5:21 amSYD-SEA
50h 36m2 stops
$1,008
Find Deal
Sun, Nov 24 - Sat, Dec 7
9:40 am - 8:35 amSEA-SYD
27h 55m1 stop
11:05 am - 12:40 pmSYD-SEA
20h 35m1 stop
$1,063Delta
Find Deal
Sun, Nov 24 - Sat, Dec 7
9:40 am - 8:35 amSEA-SYD
27h 55m1 stop
11:05 am - 4:15 pmSYD-SEA
24h 10m1 stop
$1,069Delta
Find Deal
Mon, Nov 25 - Fri, Dec 13
9:17 pm - 9:00 amSEA-SYD
40h 43m1 stop
11:15 am - 8:33 pmSYD-SEA
28h 18m1 stop
$1,229Alaska Airlines
Find Deal
Sat, Nov 23 - Mon, Dec 9
9:17 pm - 9:00 amSEA-SYD
40h 43m1 stop
11:15 am - 3:04 pmSYD-SEA
22h 49m2 stops
$1,234Alaska Airlines
Find Deal
Sat, Nov 23 - Mon, Dec 9
7:15 pm - 9:35 amSEA-SYD
19h 20m1 stop
7:15 pm - 9:50 amSYD-SEA
33h 35m2 stops
$1,420Air Canada
Find Deal
Mon, Nov 25 - Sat, Dec 14
7:15 pm - 9:35 amSEA-SYD
19h 20m1 stop
4:00 pm - 10:00 pmSYD-SEA
25h 00m1 stop
$1,465Air Canada
Find Deal
Mon, Nov 25 - Mon, Dec 9
6:20 pm - 9:15 amSEA-SYD
19h 55m1 stop
12:10 pm - 10:46 amSYD-SEA
17h 36m1 stop
$1,507United Airlines
Find Deal
Mon, Nov 25 - Tue, Dec 10
7:11 pm - 7:00 amSEA-SYD
64h 49m2 stops
11:20 am - 12:08 pmSYD-SEA
43h 48m2 stops
$1,529United Airlines
Find Deal
Fri, Nov 22 - Sun, Dec 8
9:41 am - 10:25 amSEA-SYD
29h 44m2 stops
1:55 pm - 10:30 pmSYD-SEA
27h 35m2 stops
$2,014Air New Zealand
Find Deal
Sat, Nov 23 - Mon, Nov 25

Hawaiian Airlines flights from Seattle to Sydney

Our best Hawaiian Airlines deals on Seattle to Sydney flight tickets
Hawaiian Airlines
Mar 7
SEA7:00 amSeattle/Tacoma Intl
17h 45m
1 stop
SYD7:45 pmSydney Kingsford Smith
Mar 16
SYD9:40 pmSydney Kingsford Smith
17h 45m
1 stop
SEA9:25 pmSeattle/Tacoma Intl
Hawaiian Airlines
Jan 31
SEA7:00 amSeattle/Tacoma Intl
17h 45m
1 stop
SYD7:45 pmSydney Kingsford Smith
Feb 7
SYD9:40 pmSydney Kingsford Smith
20h 15m
2 stops
SEA10:55 pmSeattle/Tacoma Intl
Hawaiian Airlines
Feb 3
SEA7:00 amSeattle/Tacoma Intl
17h 45m
1 stop
SYD7:45 pmSydney Kingsford Smith
Feb 7
SYD9:40 pmSydney Kingsford Smith
20h 15m
2 stops
SEA10:55 pmSeattle/Tacoma Intl

Alaska Airlines flights from Seattle to Sydney

Our best Alaska Airlines deals on Seattle to Sydney flight tickets
Alaska Airlines
Jan 31
SEA7:00 amSeattle/Tacoma Intl
17h 45m
1 stop
SYD7:45 pmSydney Kingsford Smith
Feb 7
SYD9:40 pmSydney Kingsford Smith
18h 40m
1 stop
SEA9:20 pmSeattle/Tacoma Intl
Alaska Airlines
Feb 5
SEA7:00 amSeattle/Tacoma Intl
17h 45m
1 stop
SYD7:45 pmSydney Kingsford Smith
Feb 8
SYD9:40 pmSydney Kingsford Smith
20h 50m
1 stop
SEA11:30 pmSeattle/Tacoma Intl
Alaska Airlines
Feb 2
SEA6:31 pmSeattle/Tacoma Intl
30h 14m
1 stop
SYD7:45 pmSydney Kingsford Smith
Feb 11
SYD9:40 pmSydney Kingsford Smith
18h 40m
1 stop
SEA9:20 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 from Seattle to Sydney?

February. The cheapest time of year to fly to Sydney from Seattle is February. 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 8% more expensive in the afternoon than in the evening

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 2% 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 November 2024, prices for Seattle to Sydney flights are approximately 12% cheaper when compared to flights at the same time last year.

What is the typical price of a round-trip flight between Seattle and Sydney?


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

$376

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 $376. The best round-trip flight deal from Seattle to Sydney found on momondo in the last 72 hours is $830.
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
9,171 reviews
Search United Airlines flights
ANAPriceFrom $767Free CancellationRating
8.4
833 reviews
Search ANA flights
Air CanadaPriceFrom $796Free CancellationRating
7.0
8,237 reviews
Search Air Canada flights
DeltaPriceFrom $839Free CancellationRating
8.0
8,756 reviews
Search Delta flights
Qantas AirwaysPriceFrom $839Free CancellationRating
7.6
820 reviews
Search Qantas Airways flights
Hawaiian AirlinesPriceFrom $890Free CancellationRating
7.9
2,287 reviews
Search Hawaiian Airlines flights
American AirlinesPriceFrom $941Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
Alaska AirlinesPriceFrom $973Free CancellationRating
8.0
9,461 reviews
Search Alaska Airlines flights
Air New ZealandPriceFrom $1,202Free CancellationRating
8.0
531 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.


An easier way to manage your Sydney trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
From?
To?
Mon 11/25
Mon 12/2
Email me momondo's favorite deals

Find better results for your trip to Australia