$762 Cheap Qantas Airways flights Seattle (SEA) to Sydney (SYD)

Apply the “Price (lowest to highest)” filter on Expedia to find cheap Qantas round-trip flights from $1,218 from SEA to SYD. Affordable one-way tickets from $762 are also available.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.

Qantas flights to Sydney tend to be more affordable in the low-season months of May and August. Whether you’re after a return or one-way ticket, you could find a better deal then.

Look for Qantas flights from SEA to SYD about one month before you want to go. The most affordable time to reserve an international flight is usually 18 to 29 days ahead of your departure date when you can save 17% versus booking four to five months in advance. Regardless of itinerary or fare class, the best day to book international airfare is usually Sunday. Friday is often the most expensive. Travelers who book on a Sunday can save 17% on average compared to those who book on a Friday.**Ideal booking window recommendation is based on average round-trip ticket prices for January through November for 2024. Best day of the week to book recommendation is based on average round-trip ticket prices for January through October 2024. All data sourced from ARC’s global airline sales database.

Fill in your dates, hit search and check “Nonstop” on Expedia to find any direct flights from SEA to SYD with Qantas or other airlines.

Search Qantas’s earliest flights from SEA to SYD by checking our “Early Morning” and “Morning” filters. Not only will you arrive at your destination sooner, early departures are also 20% less likely to be canceled.**Most reliable time of the day recommendation is based on January through August 2024 flight status data sourced from OAG’s global flight data platform.

Kingsford Smith Intl. Airport (SYD) is the main Sydney gateway for Qantas flights from Seattle - Tacoma Intl. Airport (SEA).

Qantas allows you to bring 1 checked-in bag weighing up to 66 lb with dimensions not exceeding 62 inches on standard economy flights from SEA to SYD. You can also bring 1 cabin bag in the cabin. This hand luggage must not exceed 22 inches x 9 inches x 14 inches and be no heavier than 22 lb. Baggage rules can differ depending on your fare type and cabin class, so check your booking or Qantas’s website to avoid paying additional costs at the airport.

Qantas makes flying from SEA to SYD more comfortable with top-tier customer service and a 4-star airline rating. You may even earn points with Qantas Frequent Flyer. Don’t forget to join Expedia’s free One Key™ rewards program to earn OneKeyCash™*, which can be redeemed on future bookings.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.

Depending on the type of fare you purchased, a fee typically applies if you cancel or change your booking more than 24 hours after it’s confirmed. To find plane tickets with more flexibility, select our “Changes included” or “No cancel fee” filter while looking for flights. For more details on canceling or changing your reservation, head to “Trips,” select your flight and tick “Manage Booking.”