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Cheap flights from Washington, D.C. Dulles Intl Airport to Sydney from $698

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 5/8. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — SYD
22 Jul — 29 Jul1
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 22 June 2026.

Tue 4/809:50
IAD
-
SYD
3 stops36h 00m
Multiple Airlines
Tue 11/813:15
SYD
-
IAD
3 stops35h 01m
Multiple Airlines
Deal found 20/6$1,419
Wed 19/811:05
IAD
-
SYD
3 stops34h 45m
Multiple Airlines
Tue 25/813:15
SYD
-
IAD
3 stops41h 59m
Multiple Airlines
Deal found 20/6$1,780
Tue 4/809:50
IAD
-
SYD
2 stops31h 40m
Multiple Airlines
Tue 18/809:10
SYD
-
IAD
2 stops46h 04m
Multiple Airlines
Deal found 20/6$1,881
Sat 12/907:00
IAD
-
SYD
3 stops38h 50m
Multiple Airlines
Wed 30/913:15
SYD
-
IAD
3 stops43h 54m
Multiple Airlines
Deal found 20/6$1,899
Wed 26/808:59
IAD
-
SYD
3 stops60h 51m
Multiple Airlines
Sun 27/913:15
SYD
-
IAD
3 stops43h 54m
Multiple Airlines
Deal found 17/6$1,973
Sun 20/907:00
IAD
-
SYD
3 stops38h 50m
Multiple Airlines
Wed 30/913:15
SYD
-
IAD
3 stops43h 54m
Multiple Airlines
Deal found 18/6$1,996
Wed 19/813:20
IAD
-
SYD
1 stop29h 45m
Multiple Airlines
Wed 2/917:50
SYD
-
IAD
2 stops36h 17m
Multiple Airlines
Deal found 21/6$2,060
Mon 26/1009:55
IAD
-
SYD
2 stops31h 40m
Air Canada
Sat 31/1010:20
SYD
-
IAD
2 stops25h 03m
Air Canada
Deal found 19/6$2,062
Tue 18/806:03
IAD
-
SYD
2 stops46h 47m
Multiple Airlines
Tue 25/820:45
SYD
-
IAD
2 stops35h 29m
Multiple Airlines
Deal found 21/6$2,076

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 22 June 2026.

Round-trip from

$1,419

One-way from

$698

Popular in

December

Cheapest in

November

Average price

$2,503
4/8-11/8
  • 4/8-11/8
  • 6 total stops
  • 71h 01m total
  • Washington, D.C. to Sydney
Search Deals
5/8
  • 5/8
  • 3 total stops
  • 34h 39m total
  • Washington, D.C. to Sydney
Search Deals
High demand for flights, 0% potential price rise
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($114 potential savings vs. average return price).
Search Deals
Average for round-trip flights in June 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 22 June 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
Fastest return journey

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

Mon 10/8

17:55-06:55

1 stop23h 00m

Sydney Kingsford Smith

Mon 14/12

11:20-19:05

2 stops23h 45m

$2,582

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

Sun 23/8

10:55-06:05

1 stop29h 10m

Sydney Kingsford Smith

Thu 3/9

20:10-08:40

1 stop50h 30m

$2,613

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

Mon 9/11

10:30-07:00

1 stop28h 30m

Sydney Kingsford Smith

Fri 13/11

06:00-08:10

1 stop42h 10m

$2,613

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

Thu 20/8

10:55-06:05

1 stop29h 10m

Sydney Kingsford Smith

Fri 4/9

06:00-08:40

1 stop40h 40m

$2,686

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

Fri 4/9

10:55-06:05

1 stop29h 10m

Sydney Kingsford Smith

Sun 20/12

06:00-08:10

1 stop42h 10m

$2,756

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

Thu 3/9

17:47-18:50

3 stops35h 03m

Sydney Kingsford Smith

Sat 19/9

20:45-18:14

3 stops35h 29m

$2,841

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

Sat 25/7

22:20-07:00

1 stop42h 40m

Sydney Kingsford Smith

Sat 8/8

09:30-00:55

1 stop29h 25m

$2,887

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

Sat 8/8

06:03-07:30

3 stops35h 27m

Sydney Kingsford Smith

Tue 15/12

11:15-23:59

3 stops28h 44m

$3,018

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

Thu 2/7

14:51-06:55

1 stop26h 04m

Sydney Kingsford Smith

Mon 20/7

10:20-00:55

1 stop28h 35m

$3,075

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

Mon 7/9

07:00-07:30

3 stops34h 30m

Sydney Kingsford Smith

Mon 14/9

17:50-16:54

3 stops37h 04m

$3,578

Flights are sorted by cheapest return flights first.

Deals found on 18/6

Showing 1-10 of 21 resultsSorted by cheapest first
1
2
3

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, November is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Sydney (average of $1,482). Flying from Washington, D.C. Dulles Intl Airport to Sydney in December is currently the most expensive (average of $3,220). 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 22 June 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
9,875 reviews
Check prices

Comfort

7.3

Crew

8.1

Boarding

7.7

Overall

7.4

Food

6.6

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Dynasty,May 2026

LAX - EWR

The food wasn’t nice - Hosts were not that kind.
United Airlines
7.4
Good
9,875 reviews
United Airlines
7.4
Good
9,875 reviews
Check prices

Comfort

7.3

Crew

8.1

Boarding

7.7

Overall

7.4

Food

6.6

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Dynasty,May 2026

LAX - EWR

The food wasn’t nice - Hosts were not that kind.

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.

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

    Currently priced at $1,848, 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 21% 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 $1,482). Flying from Washington, D.C. Dulles Intl Airport to Sydney in December is currently the most expensive (average of $3,220). 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
Manly
Katoomba
Cronulla
Terrigal
Lithgow
Randwick
Bondi Beach
Leura
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.
Reagan-National to Sydney flights
Baltimore 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 22 June 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$1,848Average$3,116FlexibilityNo 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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