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Cheap flights from Washington, D.C. Dulles Intl Airport to Sydney from $655

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Washington, D.C. Dulles Intl Airport to Sydney departing on 5/12. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Washington, D.C. Dulles Intl Airport to Sydney

Cheap return flights

Enter your travel dates to find the best prices.
United Airlines Logo
15:59 - 09:05IAD-SYD
25h 06m2 stops
United Airlines Logo
11:20 - 16:26SYD-IAD
21h 06m1 stop
$1,296United Airlines
Find Deal
Wed, 26 Nov - Tue, 9 Dec
United Airlines Logo
08:35 - 09:05IAD-SYD
32h 30m1 stop
United Airlines Logo
10:20 - 23:56SYD-IAD
28h 36m1 stop
$1,300United Airlines
Find Deal
Fri, 13 Feb - Sun, 15 Mar
Delta Logo
12:40 - 06:50IAD-SYD
26h 10m2 stops
Delta Logo
10:40 - 11:00SYD-IAD
40h 20m2 stops
$1,302Delta
Find Deal
Sun, 8 Feb - Sun, 8 Mar
United Airlines Logo
12:35 - 06:20IAD-SYD
25h 45m1 stop
United Airlines Logo
12:10 - 19:22SYD-IAD
22h 12m1 stop
$1,305United Airlines
Find Deal
Fri, 13 Feb - Fri, 13 Mar
Delta Logo
13:00 - 06:50IAD-SYD
25h 50m2 stops
Delta Logo
10:40 - 18:42SYD-IAD
23h 02m2 stops
$1,306Delta
Find Deal
Thu, 12 Feb - Mon, 9 Mar
United Airlines Logo
15:59 - 09:05IAD-SYD
25h 06m2 stops
United Airlines Logo
12:10 - 19:08SYD-IAD
22h 58m2 stops
$1,311United Airlines
Find Deal
Fri, 14 Nov - Fri, 5 Dec
American Airlines Logo
13:58 - 09:00IAD-SYD
27h 02m2 stops
American Airlines Logo
11:20 - 22:33SYD-IAD
27h 13m2 stops
$1,593American Airlines
Find Deal
Mon, 1 Dec - Fri, 19 Dec
Air Canada Logo
13:15 - 09:35IAD-SYD
28h 20m2 stops
Air Canada Logo
11:20 - 20:59SYD-IAD
25h 39m2 stops
$1,644Air Canada
Find Deal
Sun, 8 Feb - Tue, 24 Feb
Air Canada Logo
09:45 - 09:35IAD-SYD
31h 50m2 stops
Air Canada Logo
10:20 - 11:29SYD-IAD
40h 09m2 stops
$1,646Air Canada
Find Deal
Tue, 24 Feb - Tue, 24 Mar
Qantas Airways Logo
17:08 - 07:35IAD-SYD
46h 27m2 stops
Qantas Airways Logo
06:05 - 17:17SYD-IAD
27h 12m2 stops
$1,739Qantas Airways
Find Deal
Fri, 5 Dec - Fri, 19 Dec

Delta flights from Washington, D.C. Dulles Intl Airport to Sydney

Our best Delta deals on Washington, D.C. Dulles Intl Airport to Sydney flight tickets
Delta
8 Feb
IAD12:40Washington, D.C. Dulles Intl
26h 10m
2 stops
SYD06:50Sydney Kingsford Smith
8 Mar
SYD10:40Sydney Kingsford Smith
40h 20m
2 stops
IAD11:00Washington, D.C. Dulles Intl
$1,302
Find similar
Delta
12 Feb
IAD13:00Washington, D.C. Dulles Intl
25h 50m
2 stops
SYD06:50Sydney Kingsford Smith
9 Mar
SYD10:40Sydney Kingsford Smith
23h 02m
2 stops
IAD18:42Washington, D.C. Dulles Intl
$1,306
Find similar
Delta
1 Nov
IAD06:15Washington, D.C. Dulles Intl
34h 15m
2 stops
SYD07:30Sydney Kingsford Smith
7 Nov
SYD10:40Sydney Kingsford Smith
22h 17m
2 stops
IAD16:57Washington, D.C. Dulles Intl
$1,311
Find similar

American Airlines flights from Washington, D.C. Dulles Intl Airport to Sydney

Our best American Airlines deals on Washington, D.C. Dulles Intl Airport to Sydney flight tickets
American Airlines
1 Dec
IAD13:58Washington, D.C. Dulles Intl
27h 02m
2 stops
SYD09:00Sydney Kingsford Smith
19 Dec
SYD11:20Sydney Kingsford Smith
27h 13m
2 stops
IAD22:33Washington, D.C. Dulles Intl
$1,593
Find similar
American Airlines
30 Oct
IAD11:41Washington, D.C. Dulles Intl
30h 19m
2 stops
SYD09:00Sydney Kingsford Smith
1 Nov
SYD21:55Sydney Kingsford Smith
34h 16m
2 stops
IAD17:11Washington, D.C. Dulles Intl
$1,634
Find similar
American Airlines
2 Nov
IAD17:03Washington, D.C. Dulles Intl
21h 52m
1 stop
SYD06:55Sydney Kingsford Smith
17 Nov
SYD14:05Sydney Kingsford Smith
24h 28m
1 stop
IAD22:33Washington, D.C. Dulles Intl
$1,899
Find similar

momondo Fare Finder

 
Customise your flight search to find flights from Washington, D.C. Dulles Intl Airport 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, momondo users made 78,305 searches. Data last updated 29 October 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

Fly to

Route

Depart

Return

Price

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

Wed 26/11

15:59-09:05

2 stops25h 06m

Sydney Kingsford Smith

Tue 9/12

11:20-16:26

1 stop21h 06m

$1,296

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

Fri 13/2

08:35-09:05

1 stop32h 30m

Sydney Kingsford Smith

Sun 15/3

10:20-23:56

1 stop28h 36m

$1,300

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

Sun 8/2

12:40-06:50

2 stops26h 10m

Sydney Kingsford Smith

Sun 8/3

10:40-11:00

2 stops40h 20m

$1,302

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

Fri 13/2

12:35-06:20

1 stop25h 45m

Sydney Kingsford Smith

Fri 13/3

12:10-19:22

1 stop22h 12m

$1,305

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

Thu 12/2

13:00-06:50

2 stops25h 50m

Sydney Kingsford Smith

Mon 9/3

10:40-18:42

2 stops23h 02m

$1,306

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

Fri 14/11

15:59-09:05

2 stops25h 06m

Sydney Kingsford Smith

Fri 5/12

12:10-19:08

2 stops22h 58m

$1,311

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

Mon 1/12

13:58-09:00

2 stops27h 02m

Sydney Kingsford Smith

Fri 19/12

11:20-22:33

2 stops27h 13m

$1,593

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

Sun 8/2

13:15-09:35

2 stops28h 20m

Sydney Kingsford Smith

Tue 24/2

11:20-20:59

2 stops25h 39m

$1,644

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

Tue 24/2

09:45-09:35

2 stops31h 50m

Sydney Kingsford Smith

Tue 24/3

10:20-11:29

2 stops40h 09m

$1,646

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

Fri 5/12

17:08-07:35

2 stops46h 27m

Sydney Kingsford Smith

Fri 19/12

06:05-17:17

2 stops27h 12m

$1,739

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Sydney from

How to get the cheapest flight ticket from Washington, D.C. Dulles Intl Airport to Sydney

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Sydney?

The month of February is, on average, the cheapest month to fly to Sydney from Washington, D.C. Dulles Intl Airport, with most prices found around $1,401. If you aren’t able to travel to Sydney during the month of February, then flying in May is also cheap. Prices for this month can be found on momondo for an average of $1,410.

What is the cheapest day to depart on your flight to Sydney?

Our data shows that Tuesday is the least expensive day to fly to Sydney. Tickets to fly out on this day can be as low as $2,098. The most expensive day to fly to Sydney is Thursday, with ticket prices averaging around $2,342.

What is the cheapest time of day to depart on your flight to Sydney?

According to our data, the cheapest time of day to fly to Sydney is in the morning. momondo users have found flights departing from Washington, D.C. Dulles Intl Airport to Sydney in the morning for as low as $2,126. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. If you have a flexible travel schedule, then try to avoid flying in the evening when prices are $2,948 on average. Flights to Sydney from Washington, D.C. Dulles Intl Airport in the evening are generally more expensive because this time of day is more convenient for travellers’ schedules.

How far in advance should I book a flight to Sydney?

You are more likely to see cheaper flights to Sydney from Washington, D.C. Dulles Intl Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Sydney for around $1,944 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Sydney from Washington, D.C. Dulles Intl Airport for as low as $813 on momondo.

Can stopping save me money on Washington, D.C. Dulles Intl Airport to Sydney flights?

You could potentially save up to 32% on your flight if you consider stops on a Washington, D.C. Dulles Intl Airport to Sydney flight.

How have Washington, D.C. Dulles Intl Airport to Sydney flight prices changed over time?

As of October 2025, prices for Washington, D.C. Dulles Intl Airport to Sydney flights are approximately 51% cheaper when compared to flights at the same time last year.

When to book flights from Washington, D.C. Dulles Intl Airport to Sydney

Are you open to changing your travel dates? Check out the ideal times to fly from Washington, D.C. Dulles Intl Airport to Sydney according to our flight data. Find out which month and days have the cheapest flights.
Estimated return price

Cheap Washington, D.C. Dulles Intl Airport to Sydney (IAD to SYD) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Washington, D.C. Dulles Intl Airport to Sydney

Direct flights

None
There are no direct flights from Washington, D.C. Dulles Intl Airport to Sydney. There are no popular flight routes from Washington, D.C. Dulles Intl Airport to Sydney.
Search flight deals

  • How far is Washington, D.C. Dulles Intl to Sydney Kingsford Smith by plane?

    There are 15665.3 km between Washington, D.C. Dulles Intl and Sydney Kingsford Smith. Flights usually cover this in 23h 00m, depending on flying conditions and air traffic around both airports.

  • When did momondo last update prices for flights from Washington, D.C. Dulles Intl Airport to Sydney Kingsford Smith Airport?

    Prices for flights from Washington, D.C. Dulles Intl Airport to Sydney Kingsford Smith Airport refresh daily.

  • How many operators does momondo search for flights from Washington, D.C. Dulles Intl Airport to Sydney Kingsford Smith Airport?

  • How old do you have to be to fly from Washington, D.C. Dulles Intl Airport to Sydney Kingsford Smith Airport?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and stopovers. It is recommended that you verify with the airline you are booking with for travel from Washington, D.C. Dulles Intl Airport to Sydney Kingsford Smith Airport.

  • What documentation or ID do you need to fly to Sydney Kingsford Smith Airport?

    The necessary travel and health documents for your Sydney Kingsford Smith Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's licence and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

  • What is the most popular airline from Washington, D.C. Dulles Intl Airport to Sydney?

Best airlines flying from Washington, D.C. Dulles Intl Airport to Sydney

Compare and see reviews for airlines that fly from Washington, D.C. Dulles Intl Airport to Sydney with momondo
Airline
Rating
Free cancellation
Price
United AirlinesPriceFrom $2,369Free cancellationRating
7.4
9,001 reviews
Search United Airlines flights

Travelling to a place near Sydney?

Book flights to Sydney if you plan to visit one of these locations
Parramatta
Wollongong
Terrigal
Penrith
Katoomba
Lithgow
Leura
Manly
Bondi Beach
Coogee
Randwick
Cronulla
Charlestown
Newport
Swansea

Why use momondo?

Why should I use momondo to find a flight deal from Washington, D.C. to Sydney?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Washington, D.C. to Sydney for you.

Can I find flights from Washington, D.C. to Sydney with flexible booking policies on momondo?

Yes. All flights to Sydney from Washington, D.C. on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from Washington, D.C. to Sydney?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Washington, D.C. to Sydney.

I’m not ready to book a flight from Washington, D.C. to Sydney right now. Can momondo alert me if prices change?

Price alerts on flights to Sydney from Washington, D.C. are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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