£639 Cheap Flights from Washington (IAD) to Sydney (SYD)

View £639 flight on Sun, 23 Aug 2026Opens in a new window

Popular airlines from Washington Dulles International Airport (IAD) to Sydney Airport (SYD)

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Cheap Flights from Washington (IAD) to Sydney (SYD)

Prices were available within the past 7 days and start at £639 for one-way flights and £1,176 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Turkish Airlines
Wed, 20 Jan - Sun, 24 Jan
IAD
Washington
SYD
Sydney
£1,176 Return, found 2 days ago
£1,176
Return
found 2 days ago
Select Turkish Airlines flight, departing Wed, 20 Jan from Washington to Sydney, returning Sun, 24 Jan, priced at £1,176 found 2 days ago
Turkish Airlines
Fri, 6 Nov - Sun, 15 Nov
IAD
Washington
SYD
Sydney
£1,237 Return, found 1 day ago
£1,237
Return
found 1 day ago
Select Turkish Airlines flight, departing Fri, 6 Nov from Washington to Sydney, returning Sun, 15 Nov, priced at £1,237 found 1 day ago
Air New Zealand
Sat, 8 Aug - Sun, 23 Aug
IAD
Washington
SYD
Sydney
£1,293 Return, found 2 days ago
£1,293
Return
found 2 days ago
Select Air New Zealand flight, departing Sat, 8 Aug from Washington to Sydney, returning Sun, 23 Aug, priced at £1,293 found 2 days ago
Alaska Airlines
Wed, 6 May - Tue, 19 May
IAD
Washington
SYD
Sydney
£1,310 Return, found 17 hours ago
£1,310
Return
found 17 hours ago
Select Alaska Airlines flight, departing Wed, 6 May from Washington to Sydney, returning Tue, 19 May, priced at £1,310 found 17 hours ago
Etihad Airways
Thu, 5 Nov - Mon, 16 Nov
IAD
Washington
SYD
Sydney
£1,354 Return, found 1 day ago
£1,354
Return
found 1 day ago
Select Etihad Airways flight, departing Thu, 5 Nov from Washington to Sydney, returning Mon, 16 Nov, priced at £1,354 found 1 day ago
Air Canada
Sat, 6 Jun - Wed, 10 Jun
IAD
Washington
SYD
Sydney
£1,365 Return, found 6 days ago
£1,365
Return
found 6 days ago
Select Air Canada flight, departing Sat, 6 Jun from Washington to Sydney, returning Wed, 10 Jun, priced at £1,365 found 6 days ago
Qantas Airways
Sat, 8 Aug - Sun, 23 Aug
IAD
Washington
SYD
Sydney
£1,408 Return, found 2 days ago
£1,408
Return
found 2 days ago
Select Qantas Airways flight, departing Sat, 8 Aug from Washington to Sydney, returning Sun, 23 Aug, priced at £1,408 found 2 days ago
Emirates
Mon, 15 Feb - Wed, 17 Feb
IAD
Washington
SYD
Sydney
£1,509 Return, found 6 days ago
£1,509
Return
found 6 days ago
Select Emirates flight, departing Mon, 15 Feb from Washington to Sydney, returning Wed, 17 Feb, priced at £1,509 found 6 days ago
JetBlue Airways
Thu, 5 Nov - Mon, 16 Nov
IAD
Washington
SYD
Sydney
£1,512 Return, found 1 day ago
£1,512
Return
found 1 day ago
Select JetBlue Airways flight, departing Thu, 5 Nov from Washington to Sydney, returning Mon, 16 Nov, priced at £1,512 found 1 day ago
Qatar Airways
Thu, 5 Nov - Mon, 16 Nov
IAD
Washington
SYD
Sydney
£1,528 Return, found 1 day ago
£1,528
Return
found 1 day ago
Select Qatar Airways flight, departing Thu, 5 Nov from Washington to Sydney, returning Mon, 16 Nov, priced at £1,528 found 1 day ago

Find the cheapest month to fly from Washington (IAD) to Sydney (SYD)

February is typically the cheapest month to fly

From £895 - £1,455 per traveller.

Frequently asked questions

What is the cheapest month to fly from Washington, DC (IAD-Washington Dulles Intl.) to Sydney, NSW (SYD-Kingsford Smith Intl.)?
March is typically the cheapest month to fly from Washington, DC (IAD-Washington Dulles Intl.) to Sydney, NSW (SYD-Kingsford Smith Intl.), with average return fares of approximately £640. This is about 47% lower than the average price throughout the year. March often sees lower prices as it's outside peak holiday seasons, making it a great time to find a deal. Other cheap months to fly from Washington, DC (IAD-Washington Dulles Intl.) to Sydney, NSW (SYD-Kingsford Smith Intl.) include February and April.
How do I find cheap flights from Washington, DC (IAD-Washington Dulles Intl.) to Sydney, NSW (SYD-Kingsford Smith Intl.)?
To find a cheap flight from Washington, DC (IAD-Washington Dulles Intl.) to Sydney, NSW (SYD-Kingsford Smith Intl.), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best time to fly from Washington, DC (IAD-Washington Dulles Intl.) to Sydney, NSW (SYD-Kingsford Smith Intl.)?
Based on booking data from the past year, the cheapest months to fly from Washington, DC (IAD-Washington Dulles Intl.) to Sydney, NSW (SYD-Kingsford Smith Intl.) are typically March and February, with average return flight prices around £640. While these months offer the best value, it's worth noting that they fall outside of Sydney's peak summer season, which can mean fewer crowds and a more relaxed experience.
How many flights per day from Washington, DC (IAD-Washington Dulles Intl.) to Sydney, NSW (SYD-Kingsford Smith Intl.)?
There are approximately 73 connecting flights per day from Washington Dulles Intl. (IAD) to Kingsford Smith Intl. (SYD). Some common connection points include Los Angeles Intl. (LAX), San Francisco Intl. (SFO), and Pearson Intl. (YYZ).
What is the earliest flight from Washington, DC (IAD-Washington Dulles Intl.) to Sydney, NSW (SYD-Kingsford Smith Intl.)?
The earliest flight from Washington, DC (IAD-Washington Dulles Intl.) to Sydney, NSW (SYD-Kingsford Smith Intl.) typically departs at approximately 1:50 AM local time. This service is operated by airlines such as BR and GA. This is a seasonal service active in August. An early departure like this can help maximise your time at your destination. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What day of the week has the most flights from Washington, DC (IAD-Washington Dulles Intl.) to Sydney, NSW (SYD-Kingsford Smith Intl.)?
You'll typically find the most flights from Washington Dulles Intl. (IAD) to Kingsford Smith Intl. (SYD) on a Saturday, with around 54 flights available. This gives you a good selection of options for your journey. Major airlines on this route include United Airlines, American Airlines, and Delta Air Lines. Saturdays offer notably more flight options compared to other days of the week.
What are the most popular departure times for flights from Washington, DC (IAD-Washington Dulles Intl.) to Sydney, NSW (SYD-Kingsford Smith Intl.)?
The most popular departure times for flights from Washington Dulles Intl. (IAD) to Kingsford Smith Intl. (SYD) are in the afternoon, from 3pm to 6pm. About 39% of passengers prefer this time. Many major carriers, including American Airlines, United Airlines and Air New Zealand, offer flights during this window. This timing works well because it allows you to get to the airport after a full day and arrive in Sydney ready to start your adventure.
How long does it take to fly from Washington, DC (IAD-Washington Dulles Intl.) to Sydney, NSW (SYD-Kingsford Smith Intl.)?
Flying from IAD to SYD with a connection usually takes about 23 hours, traveling roughly 9,745 miles. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.
Can you fly business or first class from Washington, DC (IAD-Washington Dulles Intl.) to Sydney, NSW (SYD-Kingsford Smith Intl.)?
Select the "Business class" and "First class" filters when looking for IAD to SYD flights on Expedia. This is the easiest way to compare prices, routes and flight times for your trip.
How do I earn miles on a Washington, DC (IAD-Washington Dulles Intl.) to Sydney, NSW (SYD-Kingsford Smith Intl.) flight with Expedia?
It's easy to earn miles on a Washington, DC (IAD-Washington Dulles Intl.) to Sydney, NSW (SYD-Kingsford Smith Intl.) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia. *Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
What airports do you fly into for Sydney from Washington Dulles Intl. (IAD)?
If you're planning to travel to Sydney from Washington Dulles Intl. (IAD), you can fly directly into Kingsford Smith Intl. (SYD) Some flights may connect through major hubs like Hartsfield-Jackson Atlanta Intl. (ATL), Dallas-Fort Worth Intl. (DFW), Detroit Metropolitan Wayne County (DTW) before reaching Sydney. Compare routes and airports on Expedia to find the best flight options for your travel plans.
Is it cheaper to buy a plane ticket from Washington, DC (IAD-Washington Dulles Intl.) to Sydney, NSW (SYD-Kingsford Smith Intl.) at the last minute?
Typically, booking a last minute flight from Washington, DC (IAD-Washington Dulles Intl.) to Sydney, NSW (SYD-Kingsford Smith Intl.) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a Washington, DC (IAD-Washington Dulles Intl.) to Sydney, NSW (SYD-Kingsford Smith Intl.) flight and hotel package?
Securing a Washington, DC (IAD-Washington Dulles Intl.) to Sydney, NSW (SYD-Kingsford Smith Intl.) flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Washington, DC (IAD-Washington Dulles Intl.) to Sydney, NSW (SYD-Kingsford Smith Intl.)?
If you booked your Washington, DC (IAD-Washington Dulles Intl.) to Sydney, NSW (SYD-Kingsford Smith Intl.) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

Origin airport
Washington Dulles Intl.
Destination airport
Kingsford Smith Intl.
Airlines serving
Air Canada, Air New Zealand, Alaska Airlines, All Nippon Airways, American Airlines, Asiana Airlines, British Airways, Delta, Emirates, Etihad Airways, JetBlue Airways, Korean Air, Lufthansa, Malaysia Airlines, Qantas Airways, Qatar Airways, Swiss International Air Lines, Turkish Airlines, United
Return price
£1,176
Distance
15590 km

Book with confidence

Compare flights from Washington to Sydney easily and book with confidence

For travelling on business or for pleasure, Expedia makes it easy to book your flights from Washington to Sydney. Operating between them flights per day, 20 airlines cover the route. And fly direct, getting you to Kingsford Smith Intl. in just hours. If you have a preferred carrier, use our advanced search tool to find the right flight from Washington Dulles Intl. to Kingsford Smith Intl..  

To make things even better, in the advanced search, you can also choose to fly economy, premium economy, business or first class, select your maximum number of stops, and pick your preferred departure and arrival time. You can also opt for refundable and direct flights. 

Grab a great deal on your flight from Washington Dulles Intl. (IAD) to Kingsford Smith Intl. (SYD)

The easiest way to view the best deals on flights from Washington to Sydney today is to enter your travel dates and hit search. From here, you can sort your results by price to see the cheapest flights first. Right now, return flights from Washington Dulles Intl. to Kingsford Smith Intl. start at just £1,176 and range up to £1,528.  

To find an even better deal, try  

  • being flexible on your dates – midweek flights can be cheaper
  • looking for other airports near Washington and Sydney
  • booking your flight during January, the cheapest month on this route
  • varying your flight times – early morning and late at night are sometimes cheaper 

Why you should book your Washington to Sydney flight with Expedia!

We cater for all flight types, cabin classes and airlines. So whether you’re booking flights from Washington Dulles Intl. to Kingsford Smith Intl. for a budget break or a business trip with a bit of pleasure thrown in, we make it easy to secure the seat that’s right for you.  

Thanks to our supersized inventory that offers great choice all in one place, you know you’ll get a great deal with Expedia. Especially if you bundle your flight together with your hotel, you will unlock amazing savings. For added peace of mind, you can choose flexible bookings or filter to find refundable options, so you won’t pay a fee to change your flight.  

Compare flights from Washington to Sydney easily and book with confidence

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