What airlines fly to Sydney?

Air Canada, ANA and Delta are the top three most popular airlines that fly to Sydney from Seattle according to our data. Air Canada is the first choice among our users, with 39% of people opting to fly with this airline when traveling to Sydney. Keep in mind that there are 8 different airlines that fly to Sydney on a routine basis, so you have a few additional options to choose from.

Which layover airport has the shortest connection time from Seattle to Sydney?

San Francisco (SFO) has the shortest average layover time for this route: 2h 27m.

Which layover airport has the shortest travel time from Seattle to Sydney?

Flights connecting via Los Angeles (LAX) have the shortest average one-way travel time: 19h 59m.

Which layover airport offers the lowest fares from Seattle to Sydney?

Flights via Manila (MNL) offer the lowest average round-trip price of $622.

What is the cheapest airline that flies from Seattle/Tacoma Intl to Sydney Kingsford Smith?

Alaska Airlines is the most popular carrier operating from Seattle/Tacoma Intl to Sydney Kingsford Smith

Which airport is the most popular layover for flights between Seattle and Sydney?

Los Angeles (LAX) was the most common stop: 63% of momondo users choosing 1-stop flights on this route connected there.

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?

The number of operators available for flights from Seattle/Tacoma Intl Airport to Sydney Kingsford Smith Airport is 8 as of October 2026.

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.

$490 Cheap Flights from Seattle to Sydney in 2026/27

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Seattle to Sydney

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

3:15 pm - 9:35 amSEA Seattle/Tacoma Intl-SYD Sydney Kingsford Smith

23h 20m1 stop Vancouver Intl

11:20 am - 2:35 pmSYD Sydney Kingsford Smith-SEA Seattle/Tacoma Intl

22h 15m1 stop Vancouver Intl

$977Air Canada

Wed, Feb 24 - Wed, Mar 10

10:10 am - 9:35 amSEA Seattle/Tacoma Intl-SYD Sydney Kingsford Smith

28h 25m1 stop Vancouver Intl

11:20 am - 6:20 pmSYD Sydney Kingsford Smith-SEA Seattle/Tacoma Intl

26h 00m1 stop Vancouver Intl

$978Air Canada

Sun, Feb 21 - Sun, Mar 7

7:00 pm - 8:35 amSEA Seattle/Tacoma Intl-SYD Sydney Kingsford Smith

19h 35m1 stop Vancouver Intl

6:00 am - 9:18 amSYD Sydney Kingsford Smith-SEA Seattle/Tacoma Intl

20h 18m2 stops Brisbane Vancouver Intl

$988Multiple Airlines

Wed, Mar 24 - Wed, Apr 21

7:00 pm - 8:35 amSEA Seattle/Tacoma Intl-SYD Sydney Kingsford Smith

19h 35m1 stop Vancouver Intl

6:00 am - 9:18 amSYD Sydney Kingsford Smith-SEA Seattle/Tacoma Intl

20h 18m2 stops Brisbane Vancouver Intl

$989Multiple Airlines

Wed, Mar 24 - Wed, Apr 21

7:05 pm - 8:40 amSEA Seattle/Tacoma Intl-SYD Sydney Kingsford Smith

42h 35m2 stops Vancouver Intl Brisbane

11:20 am - 9:57 pmSYD Sydney Kingsford Smith-SEA Seattle/Tacoma Intl

29h 37m1 stop Vancouver Intl

$1,049Air New Zealand

Sat, Nov 14 - Wed, Nov 18

10:10 am - 8:20 amSEA Seattle/Tacoma Intl-SYD Sydney Kingsford Smith

28h 10m1 stop Vancouver Intl

9:20 am - 9:18 amSYD Sydney Kingsford Smith-SEA Seattle/Tacoma Intl

16h 58m1 stop Vancouver Intl

$1,051Air New Zealand

Tue, Mar 30 - Sun, Apr 18

7:23 am - 6:25 amSEA Seattle/Tacoma Intl-SYD Sydney Kingsford Smith

28h 02m2 stops Portland Los Angeles

11:15 am - 3:27 pmSYD Sydney Kingsford Smith-SEA Seattle/Tacoma Intl

23h 12m1 stop Los Angeles

$1,097Alaska Airlines

Thu, Nov 26 - Fri, Dec 4

7:23 am - 6:25 amSEA Seattle/Tacoma Intl-SYD Sydney Kingsford Smith

28h 02m2 stops Portland Los Angeles

11:15 am - 2:56 pmSYD Sydney Kingsford Smith-SEA Seattle/Tacoma Intl

22h 41m2 stops Los Angeles Portland

$1,097Alaska Airlines

Thu, Nov 26 - Fri, Dec 4

5:55 pm - 6:50 amSEA Seattle/Tacoma Intl-SYD Sydney Kingsford Smith

41h 55m1 stop Los Angeles

10:40 am - 10:35 amSYD Sydney Kingsford Smith-SEA Seattle/Tacoma Intl

18h 55m1 stop Los Angeles

$1,115Delta

Sat, Feb 27 - Wed, Mar 10

5:55 pm - 6:50 amSEA Seattle/Tacoma Intl-SYD Sydney Kingsford Smith

41h 55m1 stop Los Angeles

10:40 am - 10:35 amSYD Sydney Kingsford Smith-SEA Seattle/Tacoma Intl

18h 55m1 stop Los Angeles

$1,115Delta

Sat, Feb 27 - Mon, Mar 8

Cheap last minute flights

Enter your travel dates to find the best prices.

8:40 am - 8:35 amSEA Seattle/Tacoma Intl-SYD Sydney Kingsford Smith

29h 55m1 stop Vancouver Intl

11:20 am - 9:27 amSYD Sydney Kingsford Smith-SEA Seattle/Tacoma Intl

17h 07m1 stop Vancouver Intl

$978Air Canada

Wed, Oct 28 - Mon, Nov 9

3:15 pm - 8:35 amSEA Seattle/Tacoma Intl-SYD Sydney Kingsford Smith

23h 20m1 stop Vancouver Intl

9:00 am - 2:37 pmSYD Sydney Kingsford Smith-SEA Seattle/Tacoma Intl

24h 37m2 stops Brisbane Vancouver Intl

$994Air Canada

Wed, Oct 28 - Mon, Nov 9

8:20 am - 6:25 amSEA Seattle/Tacoma Intl-SYD Sydney Kingsford Smith

28h 05m1 stop Los Angeles

9:40 pm - 11:59 pmSYD Sydney Kingsford Smith-SEA Seattle/Tacoma Intl

21h 19m2 stops Honolulu Kahului

$1,056Multiple Airlines

Fri, Oct 30 - Thu, Nov 5

5:04 pm - 6:25 amSEA Seattle/Tacoma Intl-SYD Sydney Kingsford Smith

19h 21m1 stop Los Angeles

9:40 pm - 9:25 pmSYD Sydney Kingsford Smith-SEA Seattle/Tacoma Intl

18h 45m1 stop Honolulu

$1,056Multiple Airlines

Fri, Oct 30 - Thu, Nov 5

11:05 am - 7:20 amSEA Seattle/Tacoma Intl-SYD Sydney Kingsford Smith

26h 15m2 stops Salt Lake City Los Angeles

10:40 am - 11:59 pmSYD Sydney Kingsford Smith-SEA Seattle/Tacoma Intl

32h 19m2 stops Los Angeles Salt Lake City

$1,129Delta

Wed, Oct 28 - Mon, Nov 9

9:42 am - 7:20 amSEA Seattle/Tacoma Intl-SYD Sydney Kingsford Smith

27h 38m2 stops Salt Lake City Los Angeles

10:40 am - 4:53 pmSYD Sydney Kingsford Smith-SEA Seattle/Tacoma Intl

25h 13m2 stops Los Angeles Salt Lake City

$1,179Delta

Wed, Oct 28 - Thu, Nov 19

1:59 pm - 7:00 amSEA Seattle/Tacoma Intl-SYD Sydney Kingsford Smith

23h 01m1 stop Houston George Bush Intcntl

9:15 am - 1:25 pmSYD Sydney Kingsford Smith-SEA Seattle/Tacoma Intl

23h 10m1 stop Houston George Bush Intcntl

$6,224United Airlines

Wed, Oct 28 - Wed, Nov 18

1:16 pm - 9:20 amSEA Seattle/Tacoma Intl-SYD Sydney Kingsford Smith

26h 04m1 stop San Francisco

11:20 am - 7:37 pmSYD Sydney Kingsford Smith-SEA Seattle/Tacoma Intl

27h 17m1 stop Los Angeles

$6,224United Airlines

Wed, Oct 28 - Mon, Nov 16

7:30 am - 6:55 amSEA Seattle/Tacoma Intl-SYD Sydney Kingsford Smith

29h 25m1 stop Dallas/Fort Worth

11:10 am - 1:08 pmSYD Sydney Kingsford Smith-SEA Seattle/Tacoma Intl

20h 58m1 stop Los Angeles

$6,248Qantas Airways

Sat, Oct 31 - Fri, Nov 20

12:04 pm - 6:55 amSEA Seattle/Tacoma Intl-SYD Sydney Kingsford Smith

24h 51m1 stop Dallas/Fort Worth

11:10 am - 1:08 pmSYD Sydney Kingsford Smith-SEA Seattle/Tacoma Intl

20h 58m1 stop Los Angeles

$6,248Qantas Airways

Sat, Oct 31 - Thu, Nov 19

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Philippine Airlines flights from Seattle to Sydney

Our best Philippine Airlines deals on Seattle to Sydney flight tickets

Philippine Airlines

Feb 22

SEA9:30 pmSeattle/Tacoma Intl

41h 20m

1 stop

SYD9:50 amSydney Kingsford Smith

Mar 8

SYD11:30 amSydney Kingsford Smith

26h 15m

1 stop

SEA6:45 pmSeattle/Tacoma Intl

$1,002

Philippine Airlines

Mar 28

SEA11:55 pmSeattle/Tacoma Intl

39h 50m

1 stop

SYD9:45 amSydney Kingsford Smith

Apr 19

SYD11:35 amSydney Kingsford Smith

25h 00m

1 stop

SEA7:35 pmSeattle/Tacoma Intl

$1,003

Philippine Airlines

Feb 21

SEA9:30 pmSeattle/Tacoma Intl

41h 20m

1 stop

SYD9:50 amSydney Kingsford Smith

Mar 10

SYD11:30 amSydney Kingsford Smith

26h 15m

1 stop

SEA6:45 pmSeattle/Tacoma Intl

$1,033

Air New Zealand flights from Seattle to Sydney

Our best Air New Zealand deals on Seattle to Sydney flight tickets

Air New Zealand

Feb 8

SEA3:15 pmSeattle/Tacoma Intl

23h 20m

1 stop

SYD9:35 amSydney Kingsford Smith

Feb 23

SYD11:20 amSydney Kingsford Smith

17h 12m

1 stop

SEA9:32 amSeattle/Tacoma Intl

$1,051

Air New Zealand

Mar 30

SEA10:10 amSeattle/Tacoma Intl

28h 10m

1 stop

SYD8:20 amSydney Kingsford Smith

Apr 18

SYD9:20 amSydney Kingsford Smith

16h 58m

1 stop

SEA9:18 amSeattle/Tacoma Intl

$1,052

Air New Zealand

Nov 2

SEA6:00 amSeattle/Tacoma Intl

31h 35m

2 stops

SYD8:35 amSydney Kingsford Smith

Jan 13

SYD9:55 amSydney Kingsford Smith

31h 04m

2 stops

SEA9:59 pmSeattle/Tacoma Intl

$1,233

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleSydney

SEA Seattle/Tacoma Intl - SYD Sydney Kingsford Smith

SEASYD

Seattle/Tacoma Intl

Wed 2/24

3:15 pm-9:35 am

1 stop23h 20m

Sydney Kingsford Smith

Wed 3/10

11:20 am-2:35 pm

1 stop22h 15m

$977

SeattleSydney

SEA Seattle/Tacoma Intl - SYD Sydney Kingsford Smith

SEASYD

Seattle/Tacoma Intl

Sun 2/21

10:10 am-9:35 am

1 stop28h 25m

Sydney Kingsford Smith

Sun 3/7

11:20 am-6:20 pm

1 stop26h 00m

$978

Quickest round-trip

SeattleSydney

SEA Seattle/Tacoma Intl - SYD Sydney Kingsford Smith

SEASYD

Seattle/Tacoma Intl

Wed 3/24

7:00 pm-8:35 am

1 stop19h 35m

Sydney Kingsford Smith

Wed 4/21

6:00 am-9:18 am

2 stops20h 18m

$988

SeattleSydney

SEA Seattle/Tacoma Intl - SYD Sydney Kingsford Smith

SEASYD

Seattle/Tacoma Intl

Wed 3/24

7:00 pm-8:35 am

1 stop19h 35m

Sydney Kingsford Smith

Wed 4/21

6:00 am-9:18 am

2 stops20h 18m

$989

SeattleSydney

SEA Seattle/Tacoma Intl - SYD Sydney Kingsford Smith

SEASYD

Seattle/Tacoma Intl

Sat 11/14

7:05 pm-8:40 am

2 stops42h 35m

Sydney Kingsford Smith

Wed 11/18

11:20 am-9:57 pm

1 stop29h 37m

$1,049

SeattleSydney

SEA Seattle/Tacoma Intl - SYD Sydney Kingsford Smith

SEASYD

Seattle/Tacoma Intl

Tue 3/30

10:10 am-8:20 am

1 stop28h 10m

Sydney Kingsford Smith

Sun 4/18

9:20 am-9:18 am

1 stop16h 58m

$1,051

SeattleSydney

SEA Seattle/Tacoma Intl - SYD Sydney Kingsford Smith

SEASYD

Seattle/Tacoma Intl

Thu 11/26

7:23 am-6:25 am

2 stops28h 02m

Sydney Kingsford Smith

Fri 12/4

11:15 am-3:27 pm

1 stop23h 12m

$1,097

SeattleSydney

SEA Seattle/Tacoma Intl - SYD Sydney Kingsford Smith

SEASYD

Seattle/Tacoma Intl

Thu 11/26

7:23 am-6:25 am

2 stops28h 02m

Sydney Kingsford Smith

Fri 12/4

11:15 am-2:56 pm

2 stops22h 41m

$1,097

SeattleSydney

SEA Seattle/Tacoma Intl - SYD Sydney Kingsford Smith

SEASYD

Seattle/Tacoma Intl

Sat 2/27

5:55 pm-6:50 am

1 stop41h 55m

Sydney Kingsford Smith

Wed 3/10

10:40 am-10:35 am

1 stop18h 55m

$1,115

SeattleSydney

SEA Seattle/Tacoma Intl - SYD Sydney Kingsford Smith

SEASYD

Seattle/Tacoma Intl

Sat 2/27

5:55 pm-6:50 am

1 stop41h 55m

Sydney Kingsford Smith

Mon 3/8

10:40 am-10:35 am

1 stop18h 55m

$1,115

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

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

Prices

Airlines

Layovers

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

Prices are currently low for flights on this route.

Typical prices usually range from $1,000 to $1,260.
The lowest price recently found on this route was $977.

What is the cheapest month to fly to Sydney?

In general, August 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 $1,039. If you are unable to visit Sydney during the month of August, then departing from Seattle during the month September is also very affordable. Most momondo users find prices during this month for around $1,044.

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

You are more likely to see cheaper flights to Sydney from Seattle when booking weeks ahead of your departure date. In general, you can expect to find flights to Sydney for around $1,190 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Sydney from Seattle for as low as $983 on momondo.

How have Seattle to Sydney flight prices changed over time?

As of October 2026, prices for Seattle to Sydney flights are approximately 51% 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	$490
Fastest flight time	19h 15m
Direct flights	None

The best one-way flight to Sydney from Seattle in the past 72 hours is $490. The best round-trip flight deal from Seattle to Sydney found on momondo in the last 72 hours is $977.

The fastest flight from Seattle to Sydney takes 19h 15m

There are no direct flights from Seattle to Sydney. There are no popular flight routes from Seattle to Sydney.

Search flight deals

Frequently asked questions about flying from Seattle to Sydney

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 19h 15m.
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?
The number of operators available for flights from Seattle/Tacoma Intl Airport to Sydney Kingsford Smith Airport is 8 as of October 2026.
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?
Based on momondo bookings for this flight route, the most popular airline on flight routes from Seattle to Sydney is Air Canada (29% of total bookings). The next most popular airlines are ANA (18%), Delta (14%), and United Airlines (13%).

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
ANA	PriceFrom $583	Free Cancellation	Rating 8.3 1,338 reviews	Search ANA flights
Qantas Airways	PriceFrom $819	Free Cancellation	Rating 7.5 1,118 reviews	Search Qantas Airways flights
Delta	PriceFrom $835	Free Cancellation	Rating 7.8 8,677 reviews	Search Delta flights
United Airlines	PriceFrom $888	Free Cancellation	Rating 7.3 10,443 reviews	Search United Airlines flights
Air Canada	PriceFrom $938	Free Cancellation	Rating 7.1 11,818 reviews	Search Air Canada flights
Air New Zealand	PriceFrom $947	Free Cancellation	Rating 8.0 675 reviews	Search Air New Zealand flights
American Airlines	PriceFrom $975	Free Cancellation	Rating 7.0 12,187 reviews	Search American Airlines flights
Alaska Airlines	PriceFrom $1,159	Free Cancellation	Rating 7.9 13,122 reviews	Search Alaska Airlines flights

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Swansea

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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Cheap flights from Seattle to Sydney from $490

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 2/19. 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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Philippine Airlines flights from Seattle to Sydney

Our best Philippine Airlines deals on Seattle to Sydney flight tickets

Air New Zealand flights from Seattle to Sydney

Our best Air New Zealand deals on Seattle to Sydney flight tickets

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See travel insights to Sydney from

How to get the cheapest flight ticket from Seattle to Sydney

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

What is the cheapest month to fly to Sydney?

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

How have Seattle to Sydney flight prices changed over time?

What is the cheapest airline that flies from Seattle/Tacoma Intl to Sydney Kingsford Smith?

What airlines fly to Sydney?

Which airport is the most popular layover for flights between Seattle and Sydney?

Which layover airport offers the lowest fares from Seattle to Sydney?

Which layover airport has the shortest travel time from Seattle to Sydney?

Which layover airport has the shortest connection time from Seattle to Sydney?

When to book flights from Seattle to Sydney

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

Best Price Found

Fastest flight time

Direct flights

Frequently asked questions about flying 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

Traveling to a place near Sydney?

Why use momondo?

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.

Find better results for your trip to Australia

Airports servicing New South Wales

Fly your favorite airline to Sydney

Airlines are sorted and displayed according to clicks in the past 7 days on momondo

Cabin classes currently available on flights to Sydney

List of cabin classes available on flights landing in Sydney. Availability may vary depending on flight origin and airline.

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Popular flights according to clicks in the last 7 days on momondo

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According to popular flight searches on momondo this year

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