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$605+ 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 3/22. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — SYD
dic. 3 — dic. 101
mié. 12/3
mié. 12/10
1 adult, Economy
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Cheapflights Tip: The best prices from Washington, D.C. Dulles Intl to Sydney Kingsford Smith are usually found in February or May, booked 80 days in advance, depart on a Tuesday or Thursday and return on a Tuesday

Cheap 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 noviembre 3, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$1,049
(Air Canada)

One-way from

$605
(Kiwi.com)

Popular in

December

Cheapest in

February

Average price

$1,397
Provider with most accurate pricing for Washington, D.C. Dulles Intl-Sydney Kingsford Smith flight deals.
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Provider most trusted by Cheapflights users for Washington, D.C. Dulles Intl-Sydney Kingsford Smith flights.
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From Washington, D.C. Dulles Intl to Sydney Kingsford Smith
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One-way flight from Washington, D.C. Dulles Intl to Sydney Kingsford Smith
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Highest demand for flights based on searches. 20% potential increase in price ($324 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($52 potential savings vs. average RT price).
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Average for round-trip flights in November 2025
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Find 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 noviembre 3, 2025.

This Air Canada deal was found by Cheapflights users on 11/1. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 11/199:45 amIAD - SYD
2 stops31h 50mAir Canada
mié. 11/2611:20 amSYD - IAD
2 stops40h 03mAir Canada
Deal found 11/1$1,189
This Air Canada deal was found by Cheapflights users on 10/31. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 11/259:45 amIAD - SYD
2 stops31h 50mAir Canada
mar. 12/211:20 amSYD - IAD
2 stops25h 39mAir Canada
Deal found 10/31$1,200
This American Airlines deal was found by Cheapflights users on 11/2. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 11/32:16 pmIAD - SYD
2 stops24h 39mAmerican Airlines
lun. 11/102:05 pmSYD - IAD
1 stop24h 28mAmerican Airlines
Deal found 11/2$1,247
This American Airlines deal was found by Cheapflights users on 11/1. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 11/25:03 pmIAD - SYD
1 stop21h 52mAmerican Airlines
lun. 11/172:05 pmSYD - IAD
1 stop24h 28mAmerican Airlines
Deal found 11/1$1,248
This United Airlines deal was found by Cheapflights users on 11/1. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 11/26:03 pmIAD - SYD
1 stop23h 12mUnited Airlines
dom. 11/1611:50 amSYD - IAD
1 stop20h 26mUnited Airlines
Deal found 11/1$1,251
This American Airlines deal was found by Cheapflights users on 11/1. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 11/21:58 pmIAD - SYD
2 stops24h 57mAmerican Airlines
dom. 11/92:05 pmSYD - IAD
1 stop24h 27mAmerican Airlines
Deal found 11/1$1,253
This American Airlines deal was found by Cheapflights users on 11/2. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 11/236:04 amIAD - SYD
1 stop32h 51mAmerican Airlines
dom. 11/3012:30 pmSYD - IAD
2 stops26h 11mAmerican Airlines
Deal found 11/2$1,262

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 noviembre 3, 2025.
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

Dulles Intl

Fly to

Sydney

Route

Depart

Return

Price

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

mié. 2/25

4:10 pm-6:20 am

1 stop22h 10m

Sydney Kingsford Smith

dom. 3/8

2:00 pm-6:22 pm

1 stop20h 22m

$1,264

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

mar. 2/24

4:10 pm-9:15 am

1 stop25h 05m

Sydney Kingsford Smith

mar. 3/17

10:20 am-11:56 pm

1 stop28h 36m

$1,264

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

mié. 2/25

12:50 pm-7:00 am

1 stop26h 10m

Sydney Kingsford Smith

mar. 3/10

2:00 pm-7:22 pm

1 stop20h 22m

$1,264

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

mar. 2/10

4:10 pm-6:20 am

1 stop22h 10m

Sydney Kingsford Smith

mar. 2/24

12:10 pm-7:27 pm

1 stop23h 17m

$1,264

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

lun. 4/20

10:05 am-6:55 am

1 stop30h 50m

Sydney Kingsford Smith

lun. 4/27

9:30 am-4:13 pm

1 stop20h 43m

$1,264

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

mar. 2/24

4:10 pm-9:15 am

1 stop25h 05m

Sydney Kingsford Smith

mar. 3/24

2:00 pm-7:22 pm

1 stop20h 22m

$1,264

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

mié. 4/1

10:05 am-7:55 am

1 stop30h 50m

Sydney Kingsford Smith

mar. 4/28

10:20 am-7:07 pm

1 stop22h 47m

$1,264

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

dom. 12/7

4:00 pm-9:05 am

2 stops25h 05m

Sydney Kingsford Smith

dom. 12/14

12:10 pm-4:25 pm

1 stop20h 15m

$1,264

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

mar. 3/31

12:35 pm-7:55 am

1 stop28h 20m

Sydney Kingsford Smith

dom. 4/19

10:20 am-7:07 pm

1 stop22h 47m

$1,264

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

dom. 3/1

8:15 am-7:00 am

1 stop30h 45m

Sydney Kingsford Smith

dom. 4/19

10:20 am-10:36 pm

2 stops26h 16m

$1,269

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/2

Showing 1-10 of 21 results
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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 November.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
AranGrantPrice Accuracy2 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust 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 eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Washington, D.C. Dulles Intl Airport-Sydney flight deals on Cheapflights vs. eDreams >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 eDreams the most. eDreams 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?

Use this chart to determine the optimal time to book a round-trip flight from Dulles Intl to Sydney. Price data was last updated on October 31, 2025.

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 80 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, December is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Sydney (average of $649). Flying from Washington, D.C. Dulles Intl Airport to Sydney in January is currently the most expensive (average of $862). 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.

What is the cheapest time of day to fly from IAD to SYD?

Find hourly flight availability from Dulles Intl to Sydney. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated noviembre 3, 2025.

When flying from Washington, D.C. Dulles Intl Airport to Sydney, the time of day you fly usually plays a role in the price. Save by searching for a flight in the afternoon, which can drop the price by up to 16% versus a flight in the morning.

What is the cheapest day to fly from Washington, D.C. Dulles Intl Airport to Sydney?

Use this chart to determine the cheapest time to fly round-trip from Dulles Intl to Sydney. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Washington, D.C. Dulles Intl Airport to Sydney flight should consider departing on Thursday mornings when fares are most often at their lowest. Saturday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

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 noviembre 3, 2025.
Read through reviews of airlines operating flights from Washington, D.C. Dulles Intl Airport to Sydney, such as Delta, Qantas Airways, and United Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
8,001 reviews

Crew

8.5

Overall

7.9

Boarding

8.2

Comfort

7.9

Food

7.3

Entertainment

7.9

Reviews

1 / 20
8.0
Excellent

Lane,Nov 2025

MEM - ATL

The crew was very friendly, but they only came around and offered the better Delta Comfort snacks one time. I thought they would come around more frequently on a 5 hour flight. They did do two beverage services though, which was nice.
Delta
7.9
Good
8,001 reviews
Delta
7.9
Good
8,001 reviews

Crew

8.5

Overall

7.9

Boarding

8.2

Comfort

7.9

Food

7.3

Entertainment

7.9

Reviews

1 / 20
8.0
Excellent

Lane,Nov 2025

MEM - ATL

The crew was very friendly, but they only came around and offered the better Delta Comfort snacks one time. I thought they would come around more frequently on a 5 hour flight. They did do two beverage services though, which was nice.
Qantas Airways
7.5
Good
926 reviews
Delta
7.9
Good
8,001 reviews

Crew

8.5

Overall

7.9

Boarding

8.2

Comfort

7.9

Food

7.3

Entertainment

7.9

Reviews

1 / 20
8.0
Excellent

Lane,Nov 2025

MEM - ATL

The crew was very friendly, but they only came around and offered the better Delta Comfort snacks one time. I thought they would come around more frequently on a 5 hour flight. They did do two beverage services though, which was nice.
United Airlines
7.4
Good
8,997 reviews
Delta
7.9
Good
8,001 reviews

Crew

8.5

Overall

7.9

Boarding

8.2

Comfort

7.9

Food

7.3

Entertainment

7.9

Reviews

1 / 20
8.0
Excellent

Lane,Nov 2025

MEM - ATL

The crew was very friendly, but they only came around and offered the better Delta Comfort snacks one time. I thought they would come around more frequently on a 5 hour flight. They did do two beverage services though, which was nice.
American Airlines
7.2
Good
11,036 reviews
Delta
7.9
Good
8,001 reviews

Crew

8.5

Overall

7.9

Boarding

8.2

Comfort

7.9

Food

7.3

Entertainment

7.9

Reviews

1 / 20
8.0
Excellent

Lane,Nov 2025

MEM - ATL

The crew was very friendly, but they only came around and offered the better Delta Comfort snacks one time. I thought they would come around more frequently on a 5 hour flight. They did do two beverage services though, which was nice.
Air Canada
7.1
Good
10,394 reviews
Delta
7.9
Good
8,001 reviews

Crew

8.5

Overall

7.9

Boarding

8.2

Comfort

7.9

Food

7.3

Entertainment

7.9

Reviews

1 / 20
8.0
Excellent

Lane,Nov 2025

MEM - ATL

The crew was very friendly, but they only came around and offered the better Delta Comfort snacks one time. I thought they would come around more frequently on a 5 hour flight. They did do two beverage services though, which was nice.

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 7 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 22h 10m. United Airlines provides one of the quickest options available for as low as $1,264. 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 $511 on this airline. Additional options worth looking into are Delta and Qantas Airways, starting at $609 and $827 round-trip. Users have found that United Airlines is 59% 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 Dos Equis Pavilion are currently the most popular points of interest in Dallas at the moment. American Airlines Center, Dallas World Aquarium, and Dos Equis Pavilion are located about 15.0 mi, 15.5 mi, and 18.3 mi, respectively from Dallas/Fort Worth. Travelers in need of a car in Dallas can rent one for about $57 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, December is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Sydney (average of $649). Flying from Washington, D.C. Dulles Intl Airport to Sydney in January is currently the most expensive (average of $862). 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
Manly
Coogee

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Top 7 airlines flying from Dulles Intl to Sydney

Discover the top 7 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 noviembre 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$511Average$1,656FlexibilityNo cancel feeOn-time69%
DeltaCheapest$609Average$935FlexibilityNo cancel feeOn-timeN/A
Qantas AirwaysCheapest$827Average$1,164FlexibilityNo cancel feeOn-time74%
American AirlinesCheapest$830Average$869FlexibilityNo cancel feeOn-time71%
Air CanadaCheapest$854Average$1,303FlexibilityNo cancel feeOn-time67%
Air New ZealandCheapest$1,289Average$1,786FlexibilityNo cancel feeOn-time78%
ANACheapest$1,370Average$1,586FlexibilityNo cancel feeOn-time80%

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