Cheap Flights from Seattle (SEA) to Sydney (SYD)

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Compare Seattle / Tacoma International to Sydney flight deals

Find the cheapest month or even day of the year to fly to Sydney

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Flight deals from Seattle / Tacoma International to Sydney

Looking for a cheap last-minute deal or the best return flight from Seattle / Tacoma International Airport to Sydney Airport? If you want to travel next month, return fares start from $1,254. Find the lowest prices on one-way and return tickets right here.

Sydney.$1,252 per passenger.Departing Wed, 4 Nov, returning Sun, 15 Nov.Return flight with Air Canada.Outbound indirect flight with Air Canada, departs from Seattle / Tacoma International on Wed, 4 Nov, arriving in Sydney.Inbound indirect flight with Air Canada, departs from Sydney on Sun, 15 Nov, arriving in Seattle / Tacoma International.Price includes taxes and charges.From $1,252, select.

Sydney.$1,253 per passenger.Departing Wed, 17 Feb, returning Wed, 24 Feb.Return flight with Air Canada.Outbound indirect flight with Air Canada, departs from Seattle / Tacoma International on Wed, 17 Feb, arriving in Sydney.Inbound indirect flight with Air Canada, departs from Sydney on Wed, 24 Feb, arriving in Seattle / Tacoma International.Price includes taxes and charges.From $1,253, select.

Sydney.$1,254 per passenger.Departing Sun, 25 Oct, returning Sun, 1 Nov.Return flight with Air Canada.Outbound indirect flight with Air Canada, departs from Seattle / Tacoma International on Sun, 25 Oct, arriving in Sydney.Inbound indirect flight with Air Canada, departs from Sydney on Sun, 1 Nov, arriving in Seattle / Tacoma International.Price includes taxes and charges.From $1,254, select.

Sydney.$1,254 per passenger.Departing Tue, 20 Oct, returning Tue, 27 Oct.Return flight with Air Canada.Outbound indirect flight with Air Canada, departs from Seattle / Tacoma International on Tue, 20 Oct, arriving in Sydney.Inbound indirect flight with Air Canada, departs from Sydney on Tue, 27 Oct, arriving in Seattle / Tacoma International.Price includes taxes and charges.From $1,254, select.

Sydney.$1,254 per passenger.Departing Sun, 7 Mar, returning Mon, 22 Mar.Return flight with Air Canada.Outbound indirect flight with Air Canada, departs from Seattle / Tacoma International on Sun, 7 Mar, arriving in Sydney.Inbound indirect flight with Air Canada, departs from Sydney on Mon, 22 Mar, arriving in Seattle / Tacoma International.Price includes taxes and charges.From $1,254, select.

Sydney.$1,255 per passenger.Departing Sun, 7 Feb, returning Tue, 9 Mar.Return flight with Air Canada.Outbound indirect flight with Air Canada, departs from Seattle / Tacoma International on Sun, 7 Feb, arriving in Sydney.Inbound indirect flight with Air Canada, departs from Sydney on Tue, 9 Mar, arriving in Seattle / Tacoma International.Price includes taxes and charges.From $1,255, select.

Sydney.$1,256 per passenger.Departing Mon, 29 Mar, returning Mon, 5 Apr.Return flight with Air Canada.Outbound indirect flight with Air Canada, departs from Seattle / Tacoma International on Mon, 29 Mar, arriving in Sydney.Inbound indirect flight with Air Canada, departs from Sydney on Mon, 5 Apr, arriving in Seattle / Tacoma International.Price includes taxes and charges.From $1,256, select.

Sydney.$1,364 per passenger.Departing Wed, 25 Nov, returning Sun, 6 Dec.Return flight with Air Canada.Outbound indirect flight with Air Canada, departs from Seattle / Tacoma International on Wed, 25 Nov, arriving in Sydney.Inbound indirect flight with Air Canada, departs from Sydney on Sun, 6 Dec, arriving in Seattle / Tacoma International.Price includes taxes and charges.From $1,364, select.

Sydney.$1,469 per passenger.Departing Tue, 1 Dec, returning Mon, 1 Mar.Return flight with Alaska Airlines and Qantas.Outbound indirect flight with Alaska Airlines, departs from Seattle / Tacoma International on Tue, 1 Dec, arriving in Sydney.Inbound indirect flight with Qantas, departs from Sydney on Mon, 1 Mar, arriving in Seattle / Tacoma International.Price includes taxes and charges.From $1,469, select.

Sydney.$1,480 per passenger.Departing Mon, 18 Jan, returning Mon, 1 Feb.Return flight with Delta.Outbound indirect flight with Delta, departs from Seattle / Tacoma International on Mon, 18 Jan, arriving in Sydney.Inbound indirect flight with Delta, departs from Sydney on Mon, 1 Feb, arriving in Seattle / Tacoma International.Price includes taxes and charges.From $1,480, select.

Sydney.$1,491 per passenger.Departing Tue, 29 Jun, returning Tue, 20 Jul.Return flight with Alaska Airlines and Qantas.Outbound indirect flight with Alaska Airlines, departs from Seattle / Tacoma International on Tue, 29 Jun, arriving in Sydney.Inbound indirect flight with Qantas, departs from Sydney on Tue, 20 Jul, arriving in Seattle / Tacoma International.Price includes taxes and charges.From $1,491, select.

Sydney.$1,521 per passenger.Departing Mon, 18 Jan, returning Mon, 25 Jan.Return flight with United.Outbound indirect flight with United, departs from Seattle / Tacoma International on Mon, 18 Jan, arriving in Sydney.Inbound indirect flight with United, departs from Sydney on Mon, 25 Jan, arriving in Seattle / Tacoma International.Price includes taxes and charges.From $1,521, select.

Sydney.$1,521 per passenger.Departing Tue, 8 Dec, returning Tue, 22 Dec.Return flight with United.Outbound indirect flight with United, departs from Seattle / Tacoma International on Tue, 8 Dec, arriving in Sydney.Inbound indirect flight with United, departs from Sydney on Tue, 22 Dec, arriving in Seattle / Tacoma International.Price includes taxes and charges.From $1,521, select.

Sydney.$1,526 per passenger.Departing Thu, 17 Sep, returning Mon, 28 Sep.Return flight with Air Canada.Outbound indirect flight with Air Canada, departs from Seattle / Tacoma International on Thu, 17 Sep, arriving in Sydney.Inbound indirect flight with Air Canada, departs from Sydney on Mon, 28 Sep, arriving in Seattle / Tacoma International.Price includes taxes and charges.From $1,526, select.

Sydney.$1,599 per passenger.Departing Fri, 20 Aug, returning Fri, 27 Aug.Return flight with Philippine Airlines.Outbound indirect flight with Philippine Airlines, departs from Seattle / Tacoma International on Fri, 20 Aug, arriving in Sydney.Inbound indirect flight with Philippine Airlines, departs from Sydney on Fri, 27 Aug, arriving in Seattle / Tacoma International.Price includes taxes and charges.From $1,599, select.

Sydney.$1,629 per passenger.Departing Mon, 26 Jul, returning Mon, 2 Aug.Return flight with Air Canada.Outbound indirect flight with Air Canada, departs from Seattle / Tacoma International on Mon, 26 Jul, arriving in Sydney.Inbound indirect flight with Air Canada, departs from Sydney on Mon, 2 Aug, arriving in Seattle / Tacoma International.Price includes taxes and charges.From $1,629, select.

Find the cheapest month to fly from Seattle / Tacoma International to Sydney

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Seattle / Tacoma International to Sydney flights are currently cheapest in November.

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Seattle / Tacoma International to Sydney: Alternative routes

Compare routes from Seattle / Tacoma International to Sydney below. You may find an airport to fly into that's cheaper, faster, or easier than Sydney.

Sydney

9km from central Sydney

ClosestCheapest

from $1,252

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Wollongong

86km from central Sydney

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Seattle to Sydney: Flight information

The things to know before you go.

Cheapest flight found	$1,252
Cheapest month to fly	November

Finding cheap flights from Seattle / Tacoma International to Sydney: Frequently asked questions

How much are return flights from Seattle / Tacoma International to Sydney?

The best price we found for a return flight from Seattle / Tacoma International to Sydney is $1,252. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.

Which airlines fly direct from Seattle / Tacoma International to Sydney?

Currently, there are no airlines that fly direct from Seattle / Tacoma International to Sydney. But we found flights with one or more stops from $1,252.

How many flights are there a week from Seattle / Tacoma International to Sydney?

As of September 2026, there are no flights flying from Seattle / Tacoma International to Sydney.

When is the cheapest time to fly from Seattle / Tacoma International to Sydney?

The cheapest month to fly from Seattle / Tacoma International to Sydney is usually November.

Which upcoming date is cheapest to fly from Seattle / Tacoma International Airport to Sydney Airport on?

After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Seattle / Tacoma International Airport to Sydney Airport on Wednesday, 4 November 2026.

Can I get a direct flight from Seattle / Tacoma International Airport to Sydney Airport?

No airlines currently offer direct flights between Seattle / Tacoma International Airport and Sydney Airport. Most routes have one or more stops.

How can I find the best flight deal to Sydney?

We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Sydney but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.

When is the best time to book flights to Sydney?

We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Sydney is around 40 days in advance, so don’t leave your flight to the last minute.

Which is the cheapest airline to fly from Seattle / Tacoma International Airport to Sydney with?

Currently, Air Canada offers the cheapest flight tickets to Sydney.

Flying from Seattle / Tacoma International Airport (SEA) to Sydney Airport (SYD): what you need to know

The timezone in Sydney is UTC+11, which is 19 hours ahead of Seattle.
Give yourself enough time to make your SEA to SYD flight. Generally, it's best to arrive two hours before international departures and an hour ahead for domestic flights.
Flying during a peak month like July? Major public holidays and other popular seasons can mean longer lines and delays at security. Play things extra safe and arrive up to four hours ahead of an international flight and two hours before domestic departures.
We make it a cinch to book a flight with a stopover. To see your options for tickets from Seattle / Tacoma International Airport to Sydney Airport, uncheck 'Direct flights only.' Then, pick a flight that has a stop long enough to tour your chosen city. Top stopovers between SEA and SYD include:
- Los Angeles International Airport
- San Francisco International Airport
- Honolulu International Airport

How to find the cheapest flights from Seattle / Tacoma International Airport (SEA) to Sydney Airport (SYD)

$682 is the lowest price for a one-way Seattle / Tacoma International Airport to Sydney Airport flight. A return flight starts from $1,252. These fares can change based on demand.
It's a good idea to book in advance if you're hoping to get cheap tickets from SEA to SYD. That's because flight prices are based on demand, which tends to rise closer to departure.
If you're willing to be flexible with your travel plans, try using the 'Whole month' tool. It'll find the lowest price in every month when looking for a flight from Seattle / Tacoma International Airport to Sydney Airport.
There's no need to check back in every day to see if fares have dropped when you create a Price Alert. We'll notify you the moment a special offer becomes available on cheap flights from SEA to SYD.
Pick your preferred departure and arrival times, number of stops and airlines with the filters. Alternatively, sort your results by 'Cheapest' to find the best deals on flights from Seattle / Tacoma International Airport to Sydney Airport.

Handy information about Seattle / Tacoma International Airport (SEA)

Seattle / Tacoma International Airport scores top marks for its on-time performance. 80% of flights that take off from SEA arrive at their destination without delay.
Central Seattle to Seattle / Tacoma International Airport is around 23 kilometres. Depending on traffic, it'll take about 25 minutes to get there if you're driving, ride-sharing or catching a taxi.
Planning to catch public transport? Expect a trip time of around 35 minutes.
Get your travels off to a hassle-free start by staying near SEA. Whether you've booked an early flight from Seattle / Tacoma International Airport to Sydney Airport or want to avoid feeling rushed, these hotels have you covered:

Arriving at Sydney Airport (SYD)

Reserve a hotel close to SYD if you're on a late Seattle / Tacoma International Airport to Sydney Airport flight. Settle into one of these options and avoid the hassle of a long transfer:
Hit the road running by picking up a Sydney Airport rental car. Grab your wheels from simba car rental, Bargain Car Rentals or Yes Drive and experience the lesser-explored corners of Sydney and beyond.
To get the lowest price, book your vehicle from Sydney Airport about two weeks before your trip.

Getting from Sydney Airport (SYD) to central Sydney

Sydney Airport is approximately 8 kilometres from central Sydney. The drive time takes around 20 minutes.
When travelling by public transport, expect a journey of about 15 minutes.

When to fly to Sydney Airport (SYD)

The quietest month for a flight from Seattle / Tacoma International Airport to Sydney Airport is March, while July is the busiest. Choose the best time to visit Sydney based on whether you prefer a more relaxed vibe or a faster pace.
The warmest month in Sydney is January, with the temperature ranging between 17ºC (63ºF) and 32ºC (90ºF). Lock in your flights from Seattle / Tacoma International Airport to Sydney Airport in this month if you like this kind of weather.
July sees average temperatures of between 5ºC (41ºF) and 19ºC (66ºF). Look for cheap tickets from SEA to SYD around that time if you like cooler conditions.

Explore more of Australia

You've done Sydney, now it's time to explore other parts of Australia. Journey around 241 kilometres south-west to Canberra to check off its popular sights. From National Gallery of Australia to National Portrait Gallery and Museum of Australian Democracy, there's plenty to keep you busy.
Newcastle is another favourite destination in Australia and is around 121 kilometres north-east of Sydney. No trip is complete without visiting Merewether Beach, Nobbys Beach and Newcastle Beach.