Cheap flights from Seattle to Sydney

11 Dec — 18 Dec1
1 adult
Sun 11/12
Sun 18/12

How to find the cheapest flight from Seattle (SEA) to Sydney (SYD)

All the information you need to plan the best SEA to SYD flight in 2022: compare Seattle to Sydney flight prices with the expected peak season, weather and rainfall in Sydney.



C$ 1,099 - C$ 1,572



11 - 22 °C



50 - 130 mm

Popular inFebruaryHigh demand for flights, 13% potential price rise
Cheapest inAugustBest time to find cheap flights, 20% potential price drop
Average priceC$ 1,989Average for round-trip flights in December 2022
Round-trip fromC$ 1,497From Seattle/Tacoma Intl to Sydney Kingsford Smith

What is the cheapest day to fly round-trip from Seattle to Sydney?

Tuesday flights are generally found to be more expensive for flights from Seattle to Sydney. This shouldn’t discourage you from searching, as you can still find great deals by being flexible with your options. Use our search form to find deals on tickets to Sydney.

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

Travellers have found it’s best to book a flight 45 days in advance to save up to 26% compared to booking the same week of travel. As your travel date approaches, the cost of this flight route may potentially increase. While opting to book 45 days out may not be an option for all, there are still additional ways to secure a deal in the near future. You might find a flight from Seattle to Sydney 1-2 weeks in advance for as low as C$ 2,114, or C$ 2,317 for flights within the next 24 hours.

What is the cheapest month to fly from Seattle to Sydney?

Our data shows that August tends to be the cheapest month to fly to Sydney from Seattle. Users have commonly found prices around C$ 1,865 for the month, but tickets can be as low as C$ 1,200. Due to multiple factors, prepare for potentially higher prices in February.

When is the cheapest time to fly from Seattle to Sydney (SEA - SYD)?

A simple way to save on the total cost of your ticket is to fly from Seattle to Sydney in the afternoon. If you’re flexible enough to do this you can expect to save up to 48% on your trip compared to booking a flight in the morning.

Related info for your journey

Useful info, stats and facts about Seattle to Sydney flights.

How popular is this Seattle to Sydney flight route?

This flight path from Seattle/Tacoma Intl to Sydney Kingsford Smith was viewed by 19 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

Top airline flying from Seattle to Sydney

The chart below displays the airlines Cheapflights users travelling from Seattle to Sydney choose most often. Cheapest and average prices are based on aggregated data from the past 12 months.
AirlineCheapestAverageFlexibilityOn-timeCOVID-19 safety
Air CanadaCheapestC$ 1,228AverageC$ 1,546FlexibilityNo cancel feeOn-time67%COVID-19 safety
Search Air Canada flights