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Cheap flights from Washington, D.C. Dulles Intl Airport to Sydney from $832

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/11. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — SYD
6 Sep — 13 Sep1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Dulles Intl to Sydney

Enter your travel dates to find the best prices.

Cheapest flights from Dulles Intl to Sydney
Explore the most affordable flight options available from Dulles Intl to Sydney. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 7 August 2026.

Wed 9/911:12 -
3 stops34h 38m
Wed 16/913:15 -
3 stops35h 02m
Deal found 3/8$1,409
Sun 20/911:12 -
3 stops34h 38m
Sun 27/913:15 -
3 stops35h 02m
Deal found 6/8$1,652
Fri 18/910:27 -
3 stops35h 23m
Fri 25/913:15 -
3 stops35h 02m
Deal found 4/8$1,699
Tue 22/911:12 -
2 stops29h 53m
Tue 29/909:10 -
2 stops29h 00m
Deal found 4/8$1,726
Sun 6/906:20 -
2 stops34h 45m
Tue 15/909:10 -
2 stops39h 07m
Deal found 2/8$1,731
Wed 2/906:20 -
2 stops35h 10m
Wed 9/909:10 -
2 stops29h 00m
Deal found 5/8$1,733
Tue 1/911:05 -
2 stops30h 00m
Tue 8/909:10 -
2 stops33h 51m
Deal found 4/8$1,755

Find flight deals from Dulles Intl to Sydney

Discover tips and strategies to find the most affordable flight options for your journey from Dulles Intl (IAD) to Sydney (SYD). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 7 August 2026.

Round-trip from

$1,409

One-way from

$832

Popular in

December

Cheapest in

August

Average price

$1,619
9/9-16/9
  • 9/9-16/9
  • 6 total stops
  • 69h 40m total
  • Washington, D.C. to Sydney
Search Deals
10/11
  • 10/11
  • 3 total stops
  • 45h 15m total
  • Washington, D.C. to Sydney
Search Deals
Highest demand for flights based on searches. 10% potential increase in price ($394 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($116 potential savings vs. average return price).
Search Deals
Average for round-trip flights in August 2026
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Dulles Intl to Sydney that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 647,157 searches. Data last updated 7 August 2026.
Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to Sydney that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

Washington, D.C.Sydney

IAD Washington, D.C. Dulles Intl - SYD Sydney Kingsford Smith

IADSYD

Washington, D.C. Dulles Intl

Tue 26/1

20:05-22:25

2 stops34h 20m

Sydney Kingsford Smith

Wed 17/2

19:00-15:55

2 stops36h 55m

$2,184

Washington, D.C.Sydney

IAD Washington, D.C. Dulles Intl - SYD Sydney Kingsford Smith

IADSYD

Washington, D.C. Dulles Intl

Tue 2/2

17:25-19:45

3 stops34h 20m

Sydney Kingsford Smith

Thu 18/2

21:40-16:26

3 stops34h 46m

$2,200

Washington, D.C.Sydney

IAD Washington, D.C. Dulles Intl - SYD Sydney Kingsford Smith

IADSYD

Washington, D.C. Dulles Intl

Wed 9/9

21:00-20:40

2 stops33h 40m

Sydney Kingsford Smith

Wed 16/9

14:50-15:40

1 stop38h 50m

$2,206

Washington, D.C.Sydney

IAD Washington, D.C. Dulles Intl - SYD Sydney Kingsford Smith

IADSYD

Washington, D.C. Dulles Intl

Wed 4/11

20:05-20:55

2 stops32h 50m

Sydney Kingsford Smith

Sun 8/11

15:50-15:55

1 stop40h 05m

$2,260

Washington, D.C.Sydney

IAD Washington, D.C. Dulles Intl - SYD Sydney Kingsford Smith

IADSYD

Washington, D.C. Dulles Intl

Thu 17/9

21:00-20:50

2 stops33h 50m

Sydney Kingsford Smith

Thu 24/9

14:50-15:40

1 stop38h 50m

$2,282

Washington, D.C.Sydney

IAD Washington, D.C. Dulles Intl - SYD Sydney Kingsford Smith

IADSYD

Washington, D.C. Dulles Intl

Wed 26/8

17:47-18:50

2 stops35h 03m

Sydney Kingsford Smith

Sun 6/9

20:45-18:14

2 stops35h 29m

$2,360

Washington, D.C.Sydney

IAD Washington, D.C. Dulles Intl - SYD Sydney Kingsford Smith

IADSYD

Washington, D.C. Dulles Intl

Fri 23/10

17:33-19:45

3 stops35h 12m

Sydney Kingsford Smith

Fri 6/11

21:40-16:14

3 stops34h 34m

$2,373

Washington, D.C.Sydney

IAD Washington, D.C. Dulles Intl - SYD Sydney Kingsford Smith

IADSYD

Washington, D.C. Dulles Intl

Tue 26/1

17:38-06:25

2 stops44h 47m

Sydney Kingsford Smith

Wed 17/2

21:25-16:26

3 stops35h 01m

$2,451

Washington, D.C.Sydney

IAD Washington, D.C. Dulles Intl - SYD Sydney Kingsford Smith

IADSYD

Washington, D.C. Dulles Intl

Thu 3/9

11:05-10:00

2 stops32h 55m

Sydney Kingsford Smith

Sat 19/9

17:00-15:40

2 stops36h 40m

$2,457
Fastest return journey

Washington, D.C.Sydney

IAD Washington, D.C. Dulles Intl - SYD Sydney Kingsford Smith

IADSYD

Washington, D.C. Dulles Intl

Tue 29/12

17:40-09:20

1 stop23h 40m

Sydney Kingsford Smith

Wed 13/1

11:20-21:20

1 stop26h 00m

$2,566

Flights are sorted by cheapest return flights first.

Deals found on 6/8

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

Best time to book a flight from Dulles Intl to Sydney

Have a flexible travel schedule? Discover the best time to fly to Sydney from Dulles Intl with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Washington, D.C. Dulles Intl Airport to Sydney

How far ahead should I book a flight from Washington, D.C. Dulles Intl Airport to Sydney?

The best time to book flights from Washington, D.C. Dulles Intl Airport to Sydney is 4 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from Washington, D.C. Dulles Intl Airport to Sydney?

Currently, August is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Sydney (average of $1,619). Flying from Washington, D.C. Dulles Intl Airport to Sydney in December is currently the most expensive (average of $3,217). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

How much does it cost for a return flight from Washington, D.C. Dulles Intl Airport to Sydney?

Airfare is typical for this route at the moment.

Washington, D.C. Dulles Intl Airport to Sydney flights typically cost between $1,175 and $2,503 in September.
The cheapest return price found within the last 5 days was $1,409 on Multiple Airlines (9 Sept–16 Sept).

Related info for your journey

Find useful and relevant information for your journey from Dulles Intl to Sydney. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Sydney from Washington, D.C. Dulles Intl?

    If you book a flight to Sydney from Washington, D.C. Dulles Intl, you will be flying to Kingsford Smith, which is the city’s only airport. Sydney Kingsford Smith (SYD) is located 7.5 km from the centre of Sydney. There are 0 flights from Washington, D.C. Dulles Intl to Kingsford Smith per day from 0 different airlines.

  • How long is the flight from Washington, D.C. Dulles Intl Airport to Sydney?

    For as low as $2,184, Qatar Airways can have you in Sydney from Washington, D.C. Dulles Intl Airport in 34h 20m. Airlines will cover a distance of 15670 km.

  • Can I find deals for flights from Dulles Intl to Sydney that include hotel bookings?

    Yes. In addition to deals on Dulles Intl to Sydney flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Dulles Intl to Sydney?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Dulles Intl to Sydney.

  • Can I find deals for business class flights from Dulles Intl to Sydney?

    Yes. Cheapflights offers flight deals from Dulles Intl to Sydney by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Washington, D.C. Dulles Intl Airport to Sydney?

    Currently, August is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Sydney (average of $1,619). Flying from Washington, D.C. Dulles Intl Airport to Sydney in December is currently the most expensive (average of $3,217). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Travelling to a place near Sydney?

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Bondi Beach
Coogee

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Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Dulles Intl to Sydney?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Dulles Intl to Sydney. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

Why should you use Cheapflights to find cheap flight tickets from Dulles Intl to Sydney?

Cheapflights simply makes it quick and affordable to book flights from Dulles Intl to Sydney by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

Can Cheapflights find flights from Dulles Intl to Sydney with no change fees?

Certainly. Search results for flights to Sydney from Dulles Intl shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

Can Cheapflights notify me if prices for flights from Dulles Intl to Sydney become cheaper?

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Sydney from Dulles Intl today and book when prices fit your budget.

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