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Cheap flights from Seattle / Tacoma International to Sydney

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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

Book the best Sydney fare with no extra fees

Flight deals from Seattle / Tacoma International to Sydney

Looking for a cheap last-minute deal or the best return flight from Seattle / Tacoma International to Sydney? Find the lowest prices on one-way and return tickets right here.
Sydney.P48,597 per passenger.Departing Mon, 30 Jun, returning Sun, 13 Jul.Return flight with Delta.Outbound indirect flight with Delta, departs from Seattle / Tacoma International on Mon, 30 Jun, arriving in Sydney.Inbound indirect flight with Delta, departs from Sydney on Sun, 13 Jul, arriving in Seattle / Tacoma International.Price includes taxes and charges.From P48,597, select.
Sydney.P48,811 per passenger.Departing Sun, 3 Aug, returning Tue, 19 Aug.Return flight with Air Canada.Outbound indirect flight with Air Canada, departs from Seattle / Tacoma International on Sun, 3 Aug, arriving in Sydney.Inbound indirect flight with Air Canada, departs from Sydney on Tue, 19 Aug, arriving in Seattle / Tacoma International.Price includes taxes and charges.From P48,811, select.
Sydney.P49,034 per passenger.Departing Sat, 13 Sep, returning Mon, 29 Sep.Return flight with Alaska Airlines and Qantas.Outbound indirect flight with Alaska Airlines, departs from Seattle / Tacoma International on Sat, 13 Sep, arriving in Sydney.Inbound indirect flight with Qantas, departs from Sydney on Mon, 29 Sep, arriving in Seattle / Tacoma International.Price includes taxes and charges.From P49,034, select.
Sydney.P49,034 per passenger.Departing Thu, 31 Jul, returning Wed, 13 Aug.Return flight with Qantas.Outbound indirect flight with Qantas, departs from Seattle / Tacoma International on Thu, 31 Jul, arriving in Sydney.Inbound indirect flight with Qantas, departs from Sydney on Wed, 13 Aug, arriving in Seattle / Tacoma International.Price includes taxes and charges.From P49,034, select.
Sydney.P49,558 per passenger.Departing Mon, 15 Dec, returning Thu, 15 Jan.Return flight with Air Canada.Outbound indirect flight with Air Canada, departs from Seattle / Tacoma International on Mon, 15 Dec, arriving in Sydney.Inbound indirect flight with Air Canada, departs from Sydney on Thu, 15 Jan, arriving in Seattle / Tacoma International.Price includes taxes and charges.From P49,558, select.
Sydney.P49,670 per passenger.Departing Tue, 14 Oct, returning Sat, 1 Nov.Return flight with Air Canada.Outbound indirect flight with Air Canada, departs from Seattle / Tacoma International on Tue, 14 Oct, arriving in Sydney.Inbound indirect flight with Air Canada, departs from Sydney on Sat, 1 Nov, arriving in Seattle / Tacoma International.Price includes taxes and charges.From P49,670, select.
Sydney.P49,826 per passenger.Departing Fri, 22 Aug, returning Thu, 4 Sep.Return flight with Delta.Outbound indirect flight with Delta, departs from Seattle / Tacoma International on Fri, 22 Aug, arriving in Sydney.Inbound indirect flight with Delta, departs from Sydney on Thu, 4 Sep, arriving in Seattle / Tacoma International.Price includes taxes and charges.From P49,826, select.
Sydney.P49,903 per passenger.Departing Fri, 4 Jul, returning Thu, 31 Jul.Return flight with Delta.Outbound indirect flight with Delta, departs from Seattle / Tacoma International on Fri, 4 Jul, arriving in Sydney.Inbound indirect flight with Delta, departs from Sydney on Thu, 31 Jul, arriving in Seattle / Tacoma International.Price includes taxes and charges.From P49,903, 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 August.
Jun
from P53,705
Jul
from P49,903
Aug
from P48,811
Sep
from P49,034
Oct
from P51,077
Nov
from P50,565
Dec
from P52,241
Jan
Find prices
Feb
from P51,061
Mar
from P53,758
Apr
Find prices
May
from P52,305

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.

Seattle to Sydney: Flight information

The things to know before you go.
Cheapest flight foundP48,597
Cheapest month to flyJune

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

The best price we found for a return flight from Seattle / Tacoma International to Sydney is P48,597. 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.
Currently, there are no airlines that fly direct from Seattle / Tacoma International to Sydney. But we found flights with one or more stops from P48,597.
As of June 2025, there are no flights flying from Seattle / Tacoma International to Sydney.
The cheapest month to fly from Seattle / Tacoma International to Sydney is usually June 2025.
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 Monday, 30 June 2025.
No airlines currently offer direct flights between Seattle / Tacoma International Airport and Sydney Airport. Most routes have one or more stops.
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.
Currently, Delta offers the cheapest flight tickets to Sydney.

Travelling from Seattle-Tacoma International Airport (SEA) to Sydney (Kingsford Smith) Airport (SYD): what you need to know

  • The timezone in Sydney is UTC+11, which is 18 hours ahead of Seattle.

  • To ensure you get on your SEA to SYD flight, leave enough time for things like baggage drop and finding your gate. Turning up two hours before international departures and one hour before domestic flights is the standard rule.

  • You can expect longer queues in popular months such as July. Arriving up to four hours in advance for international flights and two hours for domestic departures is a wise move.

  • If you want to break up your flight, just uncheck 'Direct flights only' when searching for your ticket from Seattle-Tacoma International Airport to Sydney (Kingsford Smith) Airport. Here are the most popular stopovers between SEA and SYD:

    • Daniel K. Inouye International Airport

    • San Francisco International Airport

    • Los Angeles International Airport

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

  • P22,203 is currently the best price for a one-way Seattle-Tacoma International Airport to Sydney (Kingsford Smith) Airport flight. A return flight starts from P48,597. These prices can change depending on demand and availability.

  • Don't leave everything to the last minute. You're more likely to find cheap tickets from SEA to SYD if you book early. Airlines often offer some fantastic early bird discounts.

  • The 'Whole month' search tool shows you the cheapest flights from Seattle-Tacoma International Airport to Sydney (Kingsford Smith) Airport throughout the entire month. It's a good way to snap up a bargain if your plans aren't set in stone.

  • Finding cheap flights from SEA to SYD is easy with Price Alerts. Simply create one of these automatic alerts and we'll notify you as soon as a lower fare pops up.

  • Select your preferred arrival and departure times, number of stops and airlines with the filters. Alternatively, sort your results by 'Cheapest' to see the best deals on flights from Seattle-Tacoma International Airport to Sydney (Kingsford Smith) Airport.

Handy information about Seattle-Tacoma International Airport (SEA)

  • Seattle-Tacoma International Airport earns top marks for on-time performance. 81.27% of flights that depart SEA land on time.

  • Seattle-Tacoma International Airport is around 23 kilometres from central Seattle. If you're catching a cab, ride-sharing or driving from the centre, it'll take you 20 minutes or so to get there, depending on the traffic.

  • Planning to catch public transport? Expect a trip time of around 55 minutes.

  • Taking an early flight from Seattle-Tacoma International Airport to Sydney (Kingsford Smith) Airport? Avoid rushing to the airport (and get some extra shut-eye) by choosing one of these hotels close to SEA:

Arriving at Sydney (Kingsford Smith) Airport (SYD)

  • The last thing you need is a long journey to your hotel if you're arriving on a late Seattle-Tacoma International Airport to Sydney (Kingsford Smith) Airport flight. Check in to one of these accommodation options near SYD instead:

  • Hit the road running by picking up a Sydney (Kingsford Smith) Airport rental car. Grab your wheels from simba car hire, Bargain Car Rentals or Yes Drive and explore beyond Sydney's main sights.

  • Lock in the best rate by reserving your vehicle from Sydney (Kingsford Smith) Airport around two weeks in advance of your trip.

Getting from Sydney (Kingsford Smith) Airport (SYD) to central Sydney

  • Sydney (Kingsford Smith) Airport is approximately 18 kilometres from central Sydney. Driving there takes about 20 minutes.

  • Travelling on public transport takes about 25 minutes.

When to fly to Sydney (Kingsford Smith) Airport (SYD)

  • It's time to choose your travel dates for your flight from Seattle-Tacoma International Airport to Sydney (Kingsford Smith) Airport. April is the busiest month to head to Sydney. If you want a quieter vibe, go in April.

  • Lock in your flight from Seattle-Tacoma International Airport to Sydney (Kingsford Smith) Airport for January if you'd like to explore Sydney during its warmest month. You can expect temperatures of between 17ºC (63ºF) and 32ºC (90ºF).

  • If you want to travel in cooler conditions, look for a cheap ticket from SEA to SYD in July. Temperatures average between 5ºC (41ºF) and 19ºC (66ºF) then.

Explore more of Australia

  • You've visited Sydney, now it's time to discover other parts of Australia. Journey about 241 kilometres south-west to Canberra to tick off its leading attractions. From Australian War Memorial to National Gallery of Australia and Parliament House, there's plenty to keep you busy.

  • Around 121 kilometres north-east of Sydney, Newcastle is another essential stop in Australia. Get a taste of what this destination has to offer at Newcastle Beach, Nobbys Beach and Merewether Beach.

Plan the rest of your trip from Seattle to Sydney

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.