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Cheap flights from Washington, D.C. Dulles Intl Airport to Sydney from $886

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 19/10. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — SYD
8 Aug — 15 Aug1
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 9 July 2026.

Tue 18/811:05
IAD
-
SYD
3 stops45h 20m
Multiple Airlines
Tue 25/813:15
SYD
-
IAD
3 stops41h 59m
Multiple Airlines
Deal found 4/7$1,635
Sun 2/809:50
IAD
-
SYD
3 stops36h 00m
Multiple Airlines
Mon 10/813:15
SYD
-
IAD
3 stops33h 05m
Multiple Airlines
Deal found 5/7$1,857
Mon 17/811:10
IAD
-
SYD
2 stops29h 55m
Multiple Airlines
Mon 24/809:10
SYD
-
IAD
2 stops46h 04m
Multiple Airlines
Deal found 4/7$1,909
Sun 2/809:50
IAD
-
SYD
3 stops36h 00m
Multiple Airlines
Sat 8/813:15
SYD
-
IAD
3 stops41h 25m
Multiple Airlines
Deal found 5/7$1,943
Mon 31/810:45
IAD
-
SYD
3 stops35h 05m
Multiple Airlines
Sun 13/913:15
SYD
-
IAD
3 stops43h 54m
Multiple Airlines
Deal found 8/7$1,956
Thu 20/808:59
IAD
-
SYD
3 stops44h 11m
Multiple Airlines
Thu 27/811:45
SYD
-
IAD
3 stops43h 29m
Multiple Airlines
Deal found 5/7$1,968
Sun 9/809:50
IAD
-
SYD
2 stops55h 40m
Multiple Airlines
Sat 29/809:10
SYD
-
IAD
2 stops46h 04m
Multiple Airlines
Deal found 8/7$1,972

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 9 July 2026.

Round-trip from

$1,635

One-way from

$886

Popular in

December

Cheapest in

November

Average price

$2,874
18/8-25/8
  • 18/8-25/8
  • 6 total stops
  • 87h 19m total
  • Washington, D.C. to Sydney
Search Deals
19/10
  • 19/10
  • 2 total stops
  • 44h 30m total
  • Washington, D.C. to Sydney
Search Deals
Highest demand for flights based on searches. 1% potential increase in price ($42 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($123 potential savings vs. average return price).
Search Deals
Average for round-trip flights in July 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 9 July 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 - SYD

IADSYD

Washington, D.C. Dulles Intl

Fri 21/8

17:47-18:50

3 stops35h 03m

Sydney Kingsford Smith

Sun 30/8

20:45-16:44

3 stops33h 59m

$2,313

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

Tue 29/12

14:36-09:20

1 stop26h 44m

Sydney Kingsford Smith

Wed 13/1

11:20-21:20

1 stop26h 00m

$2,606

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

Fri 11/12

17:25-19:45

3 stops34h 20m

Sydney Kingsford Smith

Fri 8/1

21:40-19:01

3 stops37h 21m

$2,639

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

Thu 5/11

10:30-07:00

1 stop28h 30m

Sydney Kingsford Smith

Tue 10/11

11:40-08:10

2 stops36h 30m

$2,721

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

Fri 21/8

10:55-06:05

1 stop29h 10m

Sydney Kingsford Smith

Fri 28/8

06:00-08:40

1 stop40h 40m

$2,757

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

Fri 11/12

22:10-09:20

1 stop43h 10m

Sydney Kingsford Smith

Fri 8/1

11:50-01:17

1 stop29h 27m

$2,776

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

Tue 1/12

17:25-19:45

3 stops34h 20m

Sydney Kingsford Smith

Thu 31/12

21:40-16:26

2 stops34h 46m

$2,816

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

Thu 20/8

10:55-05:10

2 stops52h 15m

Sydney Kingsford Smith

Thu 27/8

14:45-08:40

2 stops55h 55m

$2,887
Fastest return journey

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

Sun 26/7

17:48-07:00

1 stop23h 12m

Sydney Kingsford Smith

Sun 16/8

10:20-22:19

1 stop25h 59m

$3,039
Cheapest one-way

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

Tue 25/8

17:47-18:50

2 stops35h 03m

$1,088

Flights are sorted by cheapest return flights first.

Deals found on 4/7

Showing 1-10 of 19 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 55 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, November is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Sydney (average of $1,501). Flying from Washington, D.C. Dulles Intl Airport to Sydney in December is currently the most expensive (average of $3,261). 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?

Reviews of airlines servicing Sydney

Get insights into the airlines that provide service to Sydney. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Sydney. Reviews last updated 9 July 2026.
See what other customers who have flown with United Airlines from Washington, D.C. Dulles Intl Airport to Sydney have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,948 reviews
Check prices

Food

6.7

Comfort

7.3

Crew

8.1

Entertainment

7.1

Boarding

7.7

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

IAD - TYS

It was a short flight on a small express plane, so no time for amenities. Quickly on, quickly off. No complaints.
United Airlines
7.4
Good
9,948 reviews
United Airlines
7.4
Good
9,948 reviews
Check prices

Food

6.7

Comfort

7.3

Crew

8.1

Entertainment

7.1

Boarding

7.7

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

IAD - TYS

It was a short flight on a small express plane, so no time for amenities. Quickly on, quickly off. No complaints.

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 1 airline.

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

    For as low as $2,606, United Airlines can have you in Sydney from Washington, D.C. Dulles Intl Airport in 26h 44m. Airlines will cover a distance of 15670 km.

  • What is the cheapest airline to fly from Washington, D.C. Dulles Intl Airport to Sydney round-trip?

    Currently priced at $1,871, United Airlines will fly you from Washington, D.C. Dulles Intl Airport to Sydney and back. In addition to United Airlines, many other airlines offer competitively priced options for your trip. Users have found that United Airlines is 19% cheaper than the other options available to this destination.

  • 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, November is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Sydney (average of $1,501). Flying from Washington, D.C. Dulles Intl Airport to Sydney in December is currently the most expensive (average of $3,261). 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?

Book flights to Sydney if you plan to visit one of these locations
Parramatta
Wollongong
Penrith
Katoomba
Manly
Lithgow
Cronulla
Terrigal
Randwick
Leura
Bondi Beach
Coogee

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Dulles Intl to Sydney

See prices for flight routes from nearby airports that may be better suited for you.
Baltimore to Sydney flights
Reagan-National to Sydney flights
Dulles Intl to Coolangatta flights

Top airline flying from Dulles Intl to Sydney

Discover the top airline that operate flights from Dulles Intl to Sydney. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 647,157 searches. Data last updated 9 July 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$1,871Average$3,155FlexibilityNo cancel feeOn-time69%
Search United Airlines flights

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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