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

Popular airlines from Sydney Airport (SYD) to Seattle, WA (BFI-Boeing Field)

    notification illustration

    Be in the know

    Get alerts if flight prices drop or rise*
    deals illustration

    Book smarter

    Save up to 30% on select hotels after you book a flight*
    trophy illustration

    Earn twice

    Earn your airline miles on top of our OneKeyCash
    Learn about One Key

Alternative airports near Seattle

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Seattle - Tacoma Intl. SEA. Cheapest option available. Average driving time to city center is 20 minutes. Flights from $1,243
SEA
Seattle - Tacoma Intl.
Cheapest
Average driving time to city center20 min
Flights from $1,243
Flights from Sydney (SYD) to Seattle (BFI)
Origin airport
Kingsford Smith Intl.
Destination airport
Boeing Field
Distance
7752 mi

Sydney to Seattle Flights

The cheapest times to fly from Sydney to Seattle

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Sydney to Seattle are during the month of . You can find some of the cheapest flights from Sydney to Seattle with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Sydney to Seattle

Sunday is one of the best days to book for cheap flights from Sydney to Seattle: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Sydney to Seattle

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Sydney to Seattle in 2025. You can also book with separate airlines for your outbound and return journeys, from one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Sydney to Seattle flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Sydney to Seattle airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Kingsford Smith Intl. Airport (SYD) to Boeing Field Airport (BFI) cost?
Grab a cheap one-way flight or cheap return flight from Kingsford Smith Intl. Airport (SYD) to Boeing Field Airport (BFI) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight offers on this route.
What is the cheapest month to fly from Kingsford Smith Intl. Airport (SYD) to Boeing Field Airport (BFI)?
Planning your getaway for can help you save, as it's the cheapest month for flights between SYD and BFI. You'll usually find the lowest fares during the off-season.
What is the cheapest airline that flies from Kingsford Smith Intl. Airport (SYD) to Boeing Field Airport (BFI)?
To find the cheapest airline that'll fly you from SYD to BFI, use Expedia's filter tool. Customize your search based on your travel style, such as preferred carriers and cabin class. You can then sort your results by "Price (lowest to highest)" to list the most affordable options first.
How many flights per day from Kingsford Smith Intl. Airport (SYD) to Boeing Field Airport (BFI)?
Direct flights from Kingsford Smith Intl. Airport (SYD) to Boeing Field Airport (BFI) aren't available daily, so you'll have to take a flight with a layover. Explore your options with Expedia's filter tool. Enter your travel dates and choose either "1 Stop" or "2+ Stops."
What day of the week has the most flights from SYD to BFI?
Friday is usually the busiest day for flights, while Tuesday tends to be the quietest.* Remember that flight schedules can vary depending on various factors, such as the time of year and airline.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Kingsford Smith Intl. Airport (SYD) to Boeing Field Airport (BFI)?
To arrive at Boeing Field Airport (BFI) without delays, select a flight that leaves Kingsford Smith Intl. Airport (SYD) before 3 PM. The likelihood of cancellations is 22% higher, on average, for departures after this hour.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Kingsford Smith Intl. Airport (SYD) to Boeing Field Airport (BFI) last-minute?
Last-minute bookings from SYD to BFI are usually more expensive. For the best rates, start searching for flights as early as possible. That being said, if you're flexible with your travel plans, it's possible to find a cheap ticket right before your trip.
Is it cheaper to book a SYD to BFI flight and hotel package?
Compared with arranging flights and hotels separately, booking a SYD to BFI flight and hotel package with Expedia could lead to significant savings. Better still, managing everything in one place takes the hassle out of planning your trip. Simply secure your flights and select from our wide range of hotels, then customize your trip with other add-ons like activities, tours and car rentals.
Can I cancel or change the date of my flight from Kingsford Smith Intl. Airport (SYD) to Boeing Field Airport (BFI)?
In most instances, you can modify or cancel your SYD to BFI flight. However, additional fees may apply, especially if you made your booking over 24 hours ago. Double-check your itinerary for the airline's policies and fees on flight changes, or if you want further information, go to our Customer Service portal.

Explore a world of travel with Expedia

*Available to One Key members.