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Cheap flights from Seattle to Sydney from $507

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Seattle to Sydney departing on 9/30. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Cheap round-trip flights

Logo
7:05 am - 7:30 pmSEA-YQY
32h 25m2 stops
Logo
7:40 pm - 12:59 pmYQY-SEA
21h 19m1 stop
$507
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Tue, Sep 30 - Tue, Oct 7
Logo
7:16 am - 7:30 pmSEA-YQY
32h 14m2 stops
Logo
7:40 pm - 7:15 amYQY-SEA
15h 35m1 stop
$604
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Tue, Sep 16 - Tue, Sep 23
Logo
7:05 am - 7:30 pmSEA-YQY
32h 25m2 stops
Logo
8:00 am - 8:29 pmYQY-SEA
40h 29m2 stops
$670
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Tue, Sep 30 - Tue, Oct 7
Air Canada Logo
2:55 pm - 12:09 amSEA-YQY
29h 14m2 stops
Air Canada Logo
5:15 am - 2:16 pmYQY-SEA
13h 01m2 stops
$715Air Canada
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Tue, Sep 16 - Tue, Sep 23
Logo
2:05 pm - 7:30 pmSEA-YQY
25h 25m2 stops
Logo
7:40 pm - 1:00 pmYQY-SEA
45h 20m3 stops
$839
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Tue, Sep 30 - Tue, Oct 7
Air Canada Logo
7:15 am - 3:48 pmSEA-YQY
28h 33m1 stop
Air Canada Logo
4:30 pm - 7:31 pmYQY-SEA
31h 01m1 stop
$1,023Air Canada
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Tue, Sep 30 - Tue, Oct 7

Air Canada flights from Seattle to Sydney, Nova Scotia

Our best Air Canada deals on Seattle to Sydney, Nova Scotia flight tickets
Air Canada
Sep 16
SEA2:55 pmSeattle/Tacoma Intl
29h 14m
2 stops
YQY12:09 amSydney
Sep 23
YQY5:15 amSydney
13h 01m
2 stops
SEA2:16 pmSeattle/Tacoma Intl
$715
Find similar
Air Canada
Sep 30
SEA7:15 amSeattle/Tacoma Intl
28h 33m
1 stop
YQY3:48 pmSydney
Oct 7
YQY4:30 pmSydney
31h 01m
1 stop
SEA7:31 pmSeattle/Tacoma Intl
$1,023
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Seattle to Sydney, Nova Scotia that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated August 18, 2025.
Use the filters below to find and compare flights from Seattle to Sydney, Nova Scotia that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

SeattleSydney

SEA - YQY

SEAYQY

Seattle/Tacoma Intl

Tue 9/30

7:05 am-7:30 pm

2 stops32h 25m

Sydney

Tue 10/7

7:40 pm-12:59 pm

1 stop21h 19m

$507

SeattleSydney

SEA - YQY

SEAYQY

Seattle/Tacoma Intl

Tue 9/16

7:16 am-7:30 pm

2 stops32h 14m

Sydney

Tue 9/23

7:40 pm-7:15 am

1 stop15h 35m

$604

SeattleSydney

SEA - YQY

SEAYQY

Seattle/Tacoma Intl

Tue 9/30

7:05 am-7:30 pm

2 stops32h 25m

Sydney

Tue 10/7

8:00 am-8:29 pm

2 stops40h 29m

$670

SeattleSydney

SEA - YQY

SEAYQY

Seattle/Tacoma Intl

Tue 9/16

2:55 pm-12:09 am

2 stops29h 14m

Sydney

Tue 9/23

5:15 am-2:16 pm

2 stops13h 01m

$715

SeattleSydney

SEA - YQY

SEAYQY

Seattle/Tacoma Intl

Tue 9/30

2:05 pm-7:30 pm

2 stops25h 25m

Sydney

Tue 10/7

7:40 pm-1:00 pm

3 stops45h 20m

$839

SeattleSydney

SEA - YQY

SEAYQY

Seattle/Tacoma Intl

Tue 9/30

7:15 am-3:48 pm

1 stop28h 33m

Sydney

Tue 10/7

4:30 pm-7:31 pm

1 stop31h 01m

$1,023

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

When to book flights from Seattle to Sydney, Nova Scotia

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

Cheap Seattle to Sydney, Nova Scotia (SEA to YQY) flight deals and tips

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

Best Price Found

$507

Fastest flight time

25h 25m

Direct flights

None

Airports in Sydney, Nova Scotia

1 airport
The best flight deal from Seattle to Sydney, Nova Scotia found on momondo in the last 72 hours is $507
The fastest flight from Seattle to Sydney, Nova Scotia takes 25h 25m
There are no direct flights from Seattle to Sydney, Nova Scotia. Popular non-direct route for this connection is Seattle/Tacoma Intl Airport - Sydney Airport.
There is 1 airport near Sydney, Nova Scotia: Sydney (YQY)
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  • How far is Seattle/Tacoma Intl to Sydney by plane?

    There are 2854.6 mi between Seattle/Tacoma Intl and Sydney. By plane, this route typically takes 25h 25m.

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

    Prices for flights from Seattle/Tacoma Intl Airport to Sydney Airport are updated daily.

  • How old do you have to be to fly from Seattle/Tacoma Intl Airport to Sydney 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 layovers. It is recommended that you verify with the airline you are booking with for travel from Seattle/Tacoma Intl Airport to Sydney Airport.

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

    The required travel and health documents for your Sydney 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 Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • How do I get Price Alerts for flights from Seattle to Sydney, Nova Scotia?

    Price Alerts will notify you by email when the price for flights to Sydney, Nova Scotia from Seattle decreases. To activate this, select your desired travel dates and search for offers. While browsing through offers you’ll see the Price Alert widget toggle. Click it to turn on notifications.

  • How can I save money on flights from Seattle to Sydney, Nova Scotia with momondo?

    By using tools like our “Price Calendar”, you can see the best day to fly round-trip for your travels. Our “Price Forecast” tool uses AI to predict whether you should purchase or hold off on booking for potentially cheaper prices. Explore shows you all flight options from a city or airport to build your own unique adventure. The Discover blog also provides valuable insights for saving money while booking your experience. After searching you can toggle on “Price Alerts” to track prices for your desired flight and book at the ideal moment.

  • How does momondo find its flight prices?

    We compare prices from 700+ competitors to help you find the price that works best for you. momondo operates in over 30 international markets, bringing you access to a wide range of fares and deals. Search for your travel using momondo for a diverse range of options from airlines and OTAs.

Traveling to a place near Sydney?

Book flights to Sydney if you plan to visit one of these locations
Cheticamp
Inverness

Why use momondo?

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

Finding the right flight to Sydney from Seattle is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Sydney quick and easy, saving you time and money.

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?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Seattle to Sydney.

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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Find better results for your trip to Canada

Airports servicing Nova Scotia

Halifax Intl Airport