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$667+ Cheap flights from Dulles Intl (IAD) to Sydney (SYD)

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 8/26. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — SYD
Jul 10 — Jul 171
Fri 7/10
Fri 7/17
1 adult, Economy
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Cheap flight deals from Dulles Intl to Sydney

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 June 10, 2026.

This Trip.com deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/149:50 am
IAD
-
SYD
3 stops36h 00m
Multiple Airlines
Wed 8/191:15 pm
SYD
-
IAD
3 stops41h 05m
Multiple Airlines
Deal found 6/10$1,158
This Trip.com deal was found by Cheapflights users on 6/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/311:17 am
IAD
-
SYD
3 stops34h 33m
Multiple Airlines
Tue 7/141:15 pm
SYD
-
IAD
3 stops35h 01m
Multiple Airlines
Deal found 6/7$1,174
This Trip.com deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/289:50 am
IAD
-
SYD
3 stops36h 00m
Multiple Airlines
Fri 7/311:15 pm
SYD
-
IAD
3 stops33h 05m
Multiple Airlines
Deal found 6/10$1,188
This 123 Milhas deal was found by Cheapflights users on 6/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure 123 Milhas is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/199:20 pm
IAD
-
SYD
1 stop54h 15m
Turkish Airlines
Tue 11/249:30 pm
SYD
-
IAD
1 stop54h 15m
Turkish Airlines
Deal found 6/6$1,221
This Trip.com deal was found by Cheapflights users on 6/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/410:54 am
IAD
-
SYD
3 stops34h 56m
Multiple Airlines
Sat 7/111:15 pm
SYD
-
IAD
3 stops37h 32m
Multiple Airlines
Deal found 6/8$1,274
This Trip.com deal was found by Cheapflights users on 6/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/239:50 am
IAD
-
SYD
3 stops36h 00m
Multiple Airlines
Tue 7/286:15 am
SYD
-
IAD
3 stops42h 01m
Multiple Airlines
Deal found 6/8$1,281
This Trip.com deal was found by Cheapflights users on 6/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/111:17 am
IAD
-
SYD
3 stops44h 53m
Multiple Airlines
Tue 7/146:15 am
SYD
-
IAD
3 stops42h 01m
Multiple Airlines
Deal found 6/7$1,284
This Trip.com deal was found by Cheapflights users on 6/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/179:55 am
IAD
-
SYD
3 stops35h 55m
Multiple Airlines
Tue 6/231:15 pm
SYD
-
IAD
3 stops33h 10m
Multiple Airlines
Deal found 6/8$1,294
This Trip.com deal was found by Cheapflights users on 6/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/311:17 am
IAD
-
SYD
3 stops34h 33m
Multiple Airlines
Mon 7/131:15 pm
SYD
-
IAD
3 stops37h 32m
Multiple Airlines
Deal found 6/7$1,299
This Trip.com deal was found by Cheapflights users on 6/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/311:17 am
IAD
-
SYD
3 stops34h 33m
Multiple Airlines
Sat 7/181:15 pm
SYD
-
IAD
3 stops37h 32m
Multiple Airlines
Deal found 6/6$1,305

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 June 10, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$1,174
(Trip.com)

One-way from

$667
(Kiwi.com)

Popular in

December

Cheapest in

November

Average price

$1,855
Provider with most accurate pricing for Washington, D.C. Dulles Intl-Sydney Kingsford Smith flight deals.
Search Deals
Provider most trusted by Cheapflights users for Washington, D.C. Dulles Intl-Sydney Kingsford Smith flights.
Search Deals
From Washington, D.C. Dulles Intl to Sydney Kingsford Smith
Search Deals
One-way flight from Washington, D.C. Dulles Intl to Sydney Kingsford Smith
Search Deals
High demand for flights, 1% potential price rise
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($56 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 2026
Search Deals

Cheapflights Fare Finder

 
Customize 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 2,558,603 searches. Data last updated June 10, 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 round-trip

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

Sun 8/2

6:14 pm-6:50 pm

2 stops34h 36m

Sydney Kingsford Smith

Sun 8/23

8:45 pm-6:14 pm

2 stops35h 29m

$1,602

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

Wed 10/14

5:33 pm-6:50 pm

3 stops34h 17m

Sydney Kingsford Smith

Sun 10/25

9:40 pm-4:33 pm

3 stops33h 53m

$1,691

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

Sun 7/26

6:14 pm-6:50 pm

2 stops34h 36m

Sydney Kingsford Smith

Sun 8/23

8:45 pm-6:14 pm

2 stops35h 29m

$1,738

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

Sun 7/19

6:14 pm-6:50 pm

2 stops34h 36m

Sydney Kingsford Smith

Sun 8/16

8:45 pm-6:45 pm

2 stops36h 00m

$1,753

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

Wed 9/9

7:00 am-7:30 am

3 stops34h 30m

Sydney Kingsford Smith

Sun 9/20

9:25 pm-11:59 pm

2 stops40h 34m

$1,762

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

Tue 8/4

3:15 pm-7:00 am

1 stop25h 45m

Sydney Kingsford Smith

Tue 8/18

9:30 am-6:50 pm

1 stop23h 20m

$1,809
Quickest round-trip

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

Sun 7/26

5:55 pm-6:55 am

1 stop23h 00m

Sydney Kingsford Smith

Sun 8/16

10:20 am-4:18 pm

1 stop19h 58m

$1,809

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

Mon 8/31

10:55 am-5:30 pm

1 stop40h 35m

Sydney Kingsford Smith

Fri 9/4

8:10 pm-8:40 am

1 stop50h 30m

$1,833

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

Thu 9/3

5:47 pm-6:50 pm

3 stops35h 03m

Sydney Kingsford Smith

Sat 9/19

8:45 pm-6:14 pm

3 stops35h 29m

$1,865

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

Wed 7/8

6:14 pm-6:50 pm

3 stops34h 36m

Sydney Kingsford Smith

Sat 8/8

8:45 pm-6:45 pm

2 stops36h 00m

$1,886

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/9

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

Compare providers for flights from Dulles Intl to Sydney

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Dulles Intl to Sydney in June.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
JustAirTicketPrice Accuracy-Trust Score*1 star
CheapfaremartPrice Accuracy-Trust Score*1 star
Trip.comPrice Accuracy1 starTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Washington, D.C. Dulles Intl Airport-Sydney flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Washington, D.C. Dulles Intl Airport-Sydney flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Washington, D.C. Dulles Intl Airport-Sydney flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Washington, D.C. Dulles Intl Airport-Sydney flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Washington, D.C. Dulles Intl Airport-Sydney flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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 round-trip 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?

To ensure you get the cheapest price possible for a flight from Washington, D.C. Dulles Intl Airport to Sydney, you should look to book at least 9 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

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 $947). Flying from Washington, D.C. Dulles Intl Airport to Sydney in December is currently the most expensive (average of $2,256). 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 to fly round-trip 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 June 10, 2026.
Read through reviews of airlines operating flights from Washington, D.C. Dulles Intl Airport to Sydney, such as Air New Zealand,Delta, andQantas Airways. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Air New Zealand
8.0
Very good
645 reviews

Boarding

8.2

Entertainment

7.4

Overall

8.0

Comfort

7.9

Crew

8.5

Food

7.4

Reviews

1 / 20
6.0
Good

Anonymous,Mar 2026

SIN - AKL

We were stuck on tarmac for an hour after boarding
Air New Zealand
8.0
Very good
645 reviews
Air New Zealand
8.0
Very good
645 reviews

Boarding

8.2

Entertainment

7.4

Overall

8.0

Comfort

7.9

Crew

8.5

Food

7.4

Reviews

1 / 20
6.0
Good

Anonymous,Mar 2026

SIN - AKL

We were stuck on tarmac for an hour after boarding
Delta
7.9
Good
8,395 reviews
Air New Zealand
8.0
Very good
645 reviews

Boarding

8.2

Entertainment

7.4

Overall

8.0

Comfort

7.9

Crew

8.5

Food

7.4

Reviews

1 / 20
6.0
Good

Anonymous,Mar 2026

SIN - AKL

We were stuck on tarmac for an hour after boarding
Qantas Airways
7.5
Good
1,046 reviews
Air New Zealand
8.0
Very good
645 reviews

Boarding

8.2

Entertainment

7.4

Overall

8.0

Comfort

7.9

Crew

8.5

Food

7.4

Reviews

1 / 20
6.0
Good

Anonymous,Mar 2026

SIN - AKL

We were stuck on tarmac for an hour after boarding
United Airlines
7.4
Good
9,807 reviews
Air New Zealand
8.0
Very good
645 reviews

Boarding

8.2

Entertainment

7.4

Overall

8.0

Comfort

7.9

Crew

8.5

Food

7.4

Reviews

1 / 20
6.0
Good

Anonymous,Mar 2026

SIN - AKL

We were stuck on tarmac for an hour after boarding
Air Canada
7.1
Good
11,154 reviews
Air New Zealand
8.0
Very good
645 reviews

Boarding

8.2

Entertainment

7.4

Overall

8.0

Comfort

7.9

Crew

8.5

Food

7.4

Reviews

1 / 20
6.0
Good

Anonymous,Mar 2026

SIN - AKL

We were stuck on tarmac for an hour after boarding

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?

    Sydney Kingsford Smith (SYD) is the airport you will fly into if you book a flight from Washington, D.C. Dulles Intl to Sydney. You should not have trouble finding flights to Kingsford Smith from Washington, D.C. Dulles Intl; the airport handles an average of 0 inbound flights from Washington, D.C. Dulles Intl per day. You should also have plenty of airline options to choose from since 6 airlines have flights to the Sydney airport from Washington, D.C. Dulles Intl. It is only a 4.6 mi journey from Kingsford Smith (SYD) to Sydney’s city center.

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

    A quick flight from Washington, D.C. Dulles Intl Airport to Sydney can take about 34h 30m. Alaska Airlines provides one of the quickest options available for as low as $1,762. Washington, D.C. Dulles Intl Airport and Sydney are separated by a distance of 9737 mi.

  • What are the cheapest airlines flying from Washington, D.C. Dulles Intl Airport to Sydney round-trip?

    Our cheapest airline available from Washington, D.C. Dulles Intl Airport to Sydney is United Airlines. Our recent data shows that you can find tickets from as low as $377 on this airline. Additional options worth looking into are Delta and Air Canada, starting at $609 and $841 round-trip. Users have found that United Airlines is 77% cheaper than the other options available to this destination.

  • Where are the most common layover locations when flying from Washington, D.C. Dulles Intl Airport to Sydney?

    Washington, D.C. Dulles Intl Airport to Sydney flights have a layover in Dallas most often.

  • What are some popular things to do or see while on a layover in Dallas?

    American Airlines Center, Dallas World Aquarium, and Reunion Tower are currently the most popular points of interest in Dallas at the moment. American Airlines Center, Dallas World Aquarium, and Reunion Tower are located about 15.0 mi, 15.5 mi, and 15.6 mi, respectively from Dallas/Fort Worth. Travelers in need of a car in Dallas can rent one for about $60 per day.

  • Where are the least popular layover locations for Washington, D.C. Dulles Intl Airport to Sydney flights?

    The least popular layover on flights from Washington, D.C. Dulles Intl Airport to Sydney is Los Angeles.

  • 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 vacation 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 $947). Flying from Washington, D.C. Dulles Intl Airport to Sydney in December is currently the most expensive (average of $2,256). 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

Traveling to a place near Sydney?

Book flights to Sydney if you plan to visit one of these locations
Parramatta
Wollongong
Coogee
Manly

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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

Top 6 airlines flying from Dulles Intl to Sydney

Discover the top 6 airlines 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 2,558,603 searches. Data last updated June 10, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$377Average$1,661FlexibilityNo cancel feeOn-time69%
DeltaCheapest$609Average$943FlexibilityNo cancel feeOn-timeN/A
Air CanadaCheapest$841Average$1,422FlexibilityNo cancel feeOn-time67%
American AirlinesCheapest$855Average$1,545FlexibilityNo cancel feeOn-time71%
Qantas AirwaysCheapest$1,197Average$1,546FlexibilityNo cancel feeOn-time74%
Air New ZealandCheapest$1,261Average$1,958FlexibilityNo cancel feeOn-time78%

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