Cheap flights from Washington, D.C. Dulles Intl Airport to Sydney from $697
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 2/2. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — SYD
4 Jan — 11 Jan1
Return
1 adult
Economy
Return
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Washington, D.C. Dulles Intl to Sydney Kingsford Smith are usually found in May or February, booked 80 days in advance, depart on a Tuesday or Saturday and return on a Friday
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 5 December 2025.
Thu 4/1216:58IAD - SYD
1 stop21h 57mAmerican Airlines
Wed 10/1214:05SYD - IAD
1 stop24h 54mAmerican Airlines
Deal found 3/12$1,942
Thu 4/1216:58IAD - SYD
1 stop21h 57mAmerican Airlines
Thu 11/1214:05SYD - IAD
1 stop24h 38mAmerican Airlines
Deal found 3/12$2,017
Thu 4/1213:20IAD - SYD
2 stops28h 15mAir Canada
Thu 11/1211:20SYD - IAD
2 stops25h 39mAir Canada
Deal found 3/12$2,069
Wed 31/1212:43IAD - SYD
2 stops28h 52mAir Canada
Thu 15/111:20SYD - IAD
2 stops26h 05mAir Canada
Deal found 3/12$2,275
Tue 30/1216:10IAD - SYD
1 stop22h 10mUnited Airlines
Sun 11/112:10SYD - IAD
1 stop28h 49mUnited Airlines
Deal found 3/12$2,343
Wed 10/1216:10IAD - SYD
1 stop22h 10mUnited Airlines
Wed 24/1212:10SYD - IAD
2 stops22h 40mUnited Airlines
Deal found 3/12$2,350
Mon 29/1222:15IAD - SYD
1 stop40h 45mUnited Airlines
Sun 11/112:10SYD - IAD
1 stop28h 49mUnited Airlines
Deal found 3/12$2,359
Thu 11/1214:06IAD - SYD
2 stops26h 54mAmerican Airlines
Wed 17/1211:20SYD - IAD
2 stops27h 48mAmerican Airlines
Deal found 3/12$2,400
Tue 23/1209:12IAD - SYD
2 stops30h 13mAmerican Airlines
Fri 23/111:20SYD - IAD
2 stops27h 52mAmerican Airlines
Deal found 3/12$2,402
Best flights from Dulles Intl to Sydney
Discover carefully curated flight deals from Dulles Intl to Sydney that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 5 December 2025.
Tue 31/317:37IAD - SYD
1 stop22h 18mMultiple Airlines
Sun 19/412:00SYD - IAD
1 stop24h 19mMultiple Airlines
Deal found 3/12$1,809
Mon 16/218:00IAD - SYD
1 stop23h 05mUnited Airlines
Mon 2/311:50SYD - IAD
1 stop20h 16mUnited Airlines
Deal found 3/12$1,831
Sat 21/317:20IAD - SYD
2 stops45h 45mDelta
Tue 7/409:25SYD - IAD
2 stops27h 34mDelta
Deal found 3/12$1,865
Fri 20/317:52IAD - SYD
1 stop22h 03mQantas Airways
Wed 8/412:00SYD - IAD
1 stop24h 19mQantas Airways
Deal found 3/12$1,887
Thu 23/417:26IAD - SYD
1 stop23h 29mAmerican Airlines
Sat 2/512:00SYD - IAD
1 stop24h 19mAmerican Airlines
Deal found 4/12$1,960
Wed 11/218:00IAD - SYD
1 stop23h 05mUnited Airlines
Wed 25/211:20SYD - IAD
1 stop21h 04mUnited Airlines
Deal found 3/12$1,831
Fri 6/307:00IAD - SYD
2 stops33h 30mDelta
Sun 15/309:40SYD - IAD
2 stops29h 46mDelta
Deal found 4/12$1,915
Sun 1/216:10IAD - SYD
1 stop22h 10mUnited Airlines
Sun 15/211:20SYD - IAD
1 stop21h 04mUnited Airlines
Deal found 3/12$1,831
Sun 29/317:45IAD - SYD
1 stop23h 15mUnited Airlines
Wed 8/409:30SYD - IAD
1 stop22h 50mUnited Airlines
Deal found 4/12$1,833
Tue 24/212:35IAD - SYD
1 stop28h 30mUnited Airlines
Tue 24/310:20SYD - IAD
1 stop23h 00mUnited Airlines
Deal found 4/12$1,833
Wed 18/319:27IAD - SYD
1 stop22h 38mUnited Airlines
Mon 6/409:30SYD - IAD
1 stop29h 09mUnited Airlines
Deal found 3/12$1,974
Last-minute flights from Dulles Intl to Sydney
Discover last-minute flight deals from Dulles Intl to Sydney. Data last updated 5 December 2025 and is based on user searches.
Wed 10/1215:25IAD - SYD
1 stop22h 55mUnited Airlines
Wed 24/1214:00SYD - IAD
1 stop21h 18mUnited Airlines
Deal found 3/12$2,343
Wed 10/1210:08IAD - SYD
2 stops30h 22mDelta
Wed 24/1210:40SYD - IAD
2 stops28h 38mDelta
Deal found 3/12$2,559
Thu 11/1214:06IAD - SYD
2 stops26h 54mAmerican Airlines
Wed 17/1211:20SYD - IAD
2 stops27h 48mAmerican Airlines
Deal found 3/12$2,400
Thu 11/1219:00IAD - SYD
1 stop22h 05mUnited Airlines
Wed 17/1211:20SYD - IAD
1 stop21h 06mUnited Airlines
Deal found 3/12$2,418
Thu 11/1218:00IAD - SYD
1 stop23h 15mUnited Airlines
Thu 18/1211:20SYD - IAD
1 stop23h 25mUnited Airlines
Deal found 3/12$2,494
Fri 12/1213:20IAD - SYD
2 stops28h 15mAir Canada
Mon 22/1211:20SYD - IAD
2 stops26h 05mAir Canada
Deal found 3/12$2,604
Sun 14/1209:45IAD - SYD
2 stops31h 50mAir Canada
Tue 30/1211:20SYD - IAD
2 stops26h 05mAir Canada
Deal found 3/12$2,628
One-way flights from Dulles Intl to Sydney
Search for one-way flight options from Dulles Intl to Sydney. Find affordable one-way fares based on user searches. Data last updated 5 December 2025.
Mon 2/217:33IAD - SYD
3 stops51h 02mMultiple Airlines
Deal found 2/12$697
Sat 28/207:05IAD - SYD
3 stops37h 30mMultiple Airlines
Deal found 3/12$844
Tue 27/118:04IAD - SYD
3 stops45h 21mMultiple Airlines
Deal found 3/12$892
Tue 10/306:00IAD - SYD
2 stops34h 25mMultiple Airlines
Deal found 4/12$895
Mon 26/117:26IAD - SYD
3 stops44h 44mMultiple Airlines
Deal found 3/12$901
Tue 7/415:43IAD - SYD
2 stops49h 47mMultiple Airlines
Deal found 2/12$924
Sun 1/314:35IAD - SYD
3 stops38h 00mMultiple Airlines
Deal found 3/12$932
Sun 25/110:50IAD - SYD
2 stops28h 35mMultiple Airlines
Deal found 3/12$960
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 5 December 2025.
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 5 December 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
Tue 31/3
17:37-06:55
1 stop22h 18m
Sydney Kingsford Smith
Sun 19/4
12:00-22:19
1 stop24h 19m
$1,809
Washington, D.C.Sydney
IAD - SYD
IADSYD
Washington, D.C. Dulles Intl
Mon 16/2
18:00-09:05
1 stop23h 05m
Sydney Kingsford Smith
Mon 2/3
11:50-16:06
1 stop20h 16m
$1,831
Washington, D.C.Sydney
IAD - SYD
IADSYD
Washington, D.C. Dulles Intl
Wed 11/2
18:00-09:05
1 stop23h 05m
Sydney Kingsford Smith
Wed 25/2
11:20-16:24
1 stop21h 04m
$1,831
Washington, D.C.Sydney
IAD - SYD
IADSYD
Washington, D.C. Dulles Intl
Sun 1/2
16:10-06:20
1 stop22h 10m
Sydney Kingsford Smith
Sun 15/2
11:20-16:24
1 stop21h 04m
$1,831
Washington, D.C.Sydney
IAD - SYD
IADSYD
Washington, D.C. Dulles Intl
Sun 29/3
17:45-08:00
1 stop23h 15m
Sydney Kingsford Smith
Wed 8/4
09:30-18:20
1 stop22h 50m
$1,833
Washington, D.C.Sydney
IAD - SYD
IADSYD
Washington, D.C. Dulles Intl
Tue 24/2
12:35-09:05
1 stop28h 30m
Sydney Kingsford Smith
Tue 24/3
10:20-18:20
1 stop23h 00m
$1,833
Washington, D.C.Sydney
IAD - SYD
IADSYD
Washington, D.C. Dulles Intl
Sat 21/3
17:20-06:05
2 stops45h 45m
Sydney Kingsford Smith
Tue 7/4
09:25-22:59
2 stops27h 34m
$1,865
Washington, D.C.Sydney
IAD - SYD
IADSYD
Washington, D.C. Dulles Intl
Fri 20/3
17:52-06:55
1 stop22h 03m
Sydney Kingsford Smith
Wed 8/4
12:00-22:19
1 stop24h 19m
$1,887
Washington, D.C.Sydney
IAD - SYD
IADSYD
Washington, D.C. Dulles Intl
Fri 6/3
07:00-08:30
2 stops33h 30m
Sydney Kingsford Smith
Sun 15/3
09:40-00:26
2 stops29h 46m
$1,915
Washington, D.C.Sydney
IAD - SYD
IADSYD
Washington, D.C. Dulles Intl
Thu 23/4
17:26-06:55
1 stop23h 29m
Sydney Kingsford Smith
Sat 2/5
12:00-22:19
1 stop24h 19m
$1,960
Flights are sorted by cheapest return flights first.
Deals found on 3/12
Showing 1-10 of 19 results
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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
Prices
More
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 28 November 2025.
The best time to book flights from Washington, D.C. Dulles Intl Airport to Sydney is 80 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, December is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Sydney (average of $921). Flying from Washington, D.C. Dulles Intl Airport to Sydney in January is currently the most expensive (average of $1,304). 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 5 December 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 morning, which can drop the price by up to 47% versus a flight at midday.
How much does it cost for a return flight from Washington, D.C. Dulles Intl Airport to Sydney?
What’s the top stopover airport for flights from Washington, D.C. Dulles Intl Airport to Sydney?
Share of one-stop return flights from Washington, D.C. Dulles Intl Airport to Sydney chosen by Cheapflights users in the past 12 months, using the same stopover each way.
Los Angeles (LAX) – chosen by Cheapflights users on 42% of one-stop itineraries from Washington, D.C. Dulles Intl Airport to Sydney on Cheapflights.
What’s the cheapest stopover airport for flights from Washington, D.C. Dulles Intl Airport to Sydney?
Average return fare for one-stop flights from Washington, D.C. Dulles Intl Airport to Sydney, chosen by Cheapflights users in the past 12 months, with the same stopover each way.
Dallas (DFW) is the most affordable one-stop option, with an average return flight price of $1,313.
What’s the fastest stopover option from Washington, D.C. Dulles Intl Airport to Sydney?
Shortest average travel time for one-stop one-way flights from Washington, D.C. Dulles Intl Airport to Sydney, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by stopover airport.
Flights via San Francisco (SFO) have the shortest average one-way travel time for one-stop routes: 23h 00m.
Which airport typically offers the quickest stopover for flights from Washington, D.C. Dulles Intl Airport to Sydney?
Average stopover duration for one-stop one-way flights from Washington, D.C. Dulles Intl Airport to Sydney, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.
Flights via San Francisco (SFO) offer the fastest connection on this route, with an average stopover time of 1h 59m.
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 5 December 2025.
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.
Smooth flight from Austin to Newark. The crew was friendly.
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 $1,831, United Airlines can have you in Sydney from Washington, D.C. Dulles Intl Airport in 23h 05m. 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 $2,353, 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.
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 $921). Flying from Washington, D.C. Dulles Intl Airport to Sydney in January is currently the most expensive (average of $1,304). 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.
Explore flights to Sydney departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on 5 December 2025.
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 5 December 2025.
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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