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Cheap flights from Washington, D.C. Dulles Intl Airport to Sydney from $748

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 24/4. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — SYD
24 Apr — 1 May1
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 25 March 2026.

Tue 5/511:07
IAD
-
SYD
2 stops29h 58m
Multiple Airlines
Tue 12/509:10
SYD
-
IAD
2 stops39h 02m
Multiple Airlines
Deal found 21/3$1,656
Wed 6/511:12
IAD
-
SYD
2 stops29h 53m
Multiple Airlines
Wed 13/509:10
SYD
-
IAD
2 stops47h 32m
Multiple Airlines
Deal found 22/3$1,693
Wed 22/412:38
IAD
-
SYD
2 stops28h 42m
Air Canada
Wed 6/509:20
SYD
-
IAD
2 stops25h 58m
Air Canada
Deal found 24/3$1,744
Wed 22/408:15
IAD
-
SYD
2 stops33h 05m
Air Canada
Tue 5/509:20
SYD
-
IAD
2 stops25h 58m
Air Canada
Deal found 23/3$1,745
Mon 20/409:55
IAD
-
SYD
2 stops31h 25m
Air Canada
Mon 27/409:20
SYD
-
IAD
2 stops25h 09m
Air Canada
Deal found 23/3$1,746
Wed 22/412:38
IAD
-
SYD
2 stops28h 42m
Multiple Airlines
Wed 6/509:20
SYD
-
IAD
1 stop25h 09m
Multiple Airlines
Deal found 24/3$1,791
Thu 23/409:00
IAD
-
SYD
2 stops32h 20m
Air Canada
Wed 6/509:20
SYD
-
IAD
2 stops25h 09m
Air Canada
Deal found 23/3$1,808

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 25 March 2026.

Round-trip from

$1,656

One-way from

$748

Popular in

December

Cheapest in

May

Average price

$2,221
5/5-12/5
  • 5/5-12/5
  • 4 total stops
  • 69h 00m total
  • Washington, D.C. to Sydney
Search Deals
24/4
  • 24/4
  • 2 total stops
  • 49h 31m total
  • Washington, D.C. to Sydney
Search Deals
Highest demand for flights based on searches. 10% potential increase in price ($404 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($120 potential savings vs. average return price).
Search Deals
Average for round-trip flights in March 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 25 March 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

Wed 3/6

17:38-18:50

2 stops35h 12m

Sydney Kingsford Smith

Tue 16/6

20:45-06:54

2 stops24h 09m

$2,268

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

Wed 26/8

17:25-18:50

3 stops35h 25m

Sydney Kingsford Smith

Tue 8/9

20:45-16:26

3 stops33h 41m

$2,280

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

Sun 10/5

19:20-18:50

2 stops33h 30m

Sydney Kingsford Smith

Tue 19/5

20:45-17:42

3 stops34h 57m

$2,310

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

Tue 4/8

15:15-07:00

1 stop25h 45m

Sydney Kingsford Smith

Sun 27/9

10:20-01:17

1 stop28h 57m

$2,449

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

Sat 15/8

22:20-07:00

1 stop42h 40m

Sydney Kingsford Smith

Mon 31/8

10:20-01:17

1 stop28h 57m

$2,473
Fastest return journey

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

Sun 26/7

17:55-06:55

1 stop23h 00m

Sydney Kingsford Smith

Sat 8/8

10:20-16:25

1 stop20h 05m

$2,521

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

Wed 3/6

15:15-07:00

1 stop25h 45m

Sydney Kingsford Smith

Thu 18/6

10:20-19:11

1 stop22h 51m

$2,521

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

Wed 6/5

10:55-06:25

2 stops53h 30m

Sydney Kingsford Smith

Wed 13/5

21:10-08:40

1 stop49h 30m

$2,525

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

Tue 14/4

10:55-06:25

2 stops53h 30m

Sydney Kingsford Smith

Mon 25/5

21:10-08:40

1 stop49h 30m

$2,526

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

10:20-21:18

1 stop24h 58m

$2,545

Flights are sorted by cheapest return flights first.

Deals found on 24/3

Showing 1-10 of 22 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?

Use this chart to determine the optimal time to book a return flight from Dulles Intl to Sydney. Price data was last updated on 13 March 2026.

The best time to book flights from Washington, D.C. Dulles Intl Airport to Sydney is 10 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 $450). Flying from Washington, D.C. Dulles Intl Airport to Sydney in April is currently the most expensive (average of $1,652). 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.

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 25 March 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
9,477 reviews
Check prices

Boarding

7.7

Crew

8.1

Entertainment

7.1

Overall

7.4

Comfort

7.3

Food

6.6

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family
United Airlines
7.4
Good
9,477 reviews
United Airlines
7.4
Good
9,477 reviews
Check prices

Boarding

7.7

Crew

8.1

Entertainment

7.1

Overall

7.4

Comfort

7.3

Food

6.6

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family

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 $2,449, United Airlines can have you in Sydney from Washington, D.C. Dulles Intl Airport in 25h 45m. 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 $1,860, 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 20% 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, August is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Sydney (average of $450). Flying from Washington, D.C. Dulles Intl Airport to Sydney in April is currently the most expensive (average of $1,652). 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
Terrigal
Lithgow
Katoomba
Manly
Bondi Beach
Coogee
Cronulla
Leura
Randwick

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 25 March 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$1,860Average$2,738FlexibilityNo 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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