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Cheap flights from Washington, D.C. Dulles Intl Airport to Sydney from $898

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 6/12. 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.
Multiple Airlines Logo
05:45 - 09:00IAD-SYD
35h 15m2 stops
Multiple Airlines Logo
11:20 - 11:38SYD-IAD
40h 18m2 stops
$1,799Multiple Airlines
Find Deal
Thu, 11 Dec - Thu, 18 Dec
Air Canada Logo
13:13 - 09:35IAD-SYD
28h 22m2 stops
Air Canada Logo
09:20 - 07:46SYD-IAD
36h 26m2 stops
$2,018Air Canada
Find Deal
Tue, 17 Feb - Tue, 26 May
Air Canada Logo
09:45 - 09:35IAD-SYD
31h 50m2 stops
Air Canada Logo
11:20 - 20:54SYD-IAD
25h 34m2 stops
$2,025Air Canada
Find Deal
Mon, 23 Feb - Tue, 3 Mar
Air Canada Logo
09:45 - 09:35IAD-SYD
31h 50m3 stops
Air Canada Logo
11:20 - 20:54SYD-IAD
25h 34m2 stops
$2,027Air Canada
Find Deal
Tue, 10 Feb - Tue, 24 Feb
Air Canada Logo
17:48 - 09:35IAD-SYD
47h 47m3 stops
Air Canada Logo
11:20 - 20:54SYD-IAD
25h 34m2 stops
$2,028Air Canada
Find Deal
Sat, 7 Feb - Tue, 17 Feb
Air Canada Logo
09:45 - 09:35IAD-SYD
31h 50m3 stops
Air Canada Logo
11:20 - 20:54SYD-IAD
25h 34m2 stops
$2,036Air Canada
Find Deal
Mon, 23 Feb - Tue, 3 Mar
Air Canada Logo
09:45 - 09:35IAD-SYD
31h 50m3 stops
Air Canada Logo
10:20 - 11:29SYD-IAD
40h 09m3 stops
$2,038Air Canada
Find Deal
Wed, 25 Feb - Wed, 11 Mar
Air Canada Logo
09:45 - 09:35IAD-SYD
31h 50m2 stops
Air Canada Logo
10:20 - 20:54SYD-IAD
25h 34m2 stops
$2,079Air Canada
Find Deal
Fri, 20 Feb - Tue, 10 Mar
Air Canada Logo
09:45 - 09:35IAD-SYD
31h 50m3 stops
Air Canada Logo
11:20 - 20:54SYD-IAD
25h 34m2 stops
$2,088Air Canada
Find Deal
Fri, 13 Feb - Sun, 22 Feb
Air Canada Logo
09:45 - 09:35IAD-SYD
31h 50m3 stops
Air Canada Logo
10:20 - 20:54SYD-IAD
25h 34m2 stops
$2,090Air Canada
Find Deal
Fri, 20 Feb - Tue, 10 Mar

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

Our best Cathay Pacific deals on Washington, D.C. Dulles Intl Airport to Sydney flight tickets
Cathay Pacific
17 Nov
IAD17:27Washington, D.C. Dulles Intl
45h 48m
2 stops
SYD07:15Sydney Kingsford Smith
24 Nov
SYD22:20Sydney Kingsford Smith
40h 21m
2 stops
IAD22:41Washington, D.C. Dulles Intl
$2,183
Find similar
Cathay Pacific
30 Apr
IAD17:26Washington, D.C. Dulles Intl
36h 44m
2 stops
SYD20:10Sydney Kingsford Smith
4 May
SYD07:40Sydney Kingsford Smith
46h 27m
2 stops
IAD16:07Washington, D.C. Dulles Intl
$2,195
Find similar
Cathay Pacific
20 Apr
IAD17:26Washington, D.C. Dulles Intl
36h 44m
2 stops
SYD20:10Sydney Kingsford Smith
27 Apr
SYD21:50Sydney Kingsford Smith
56h 17m
2 stops
IAD16:07Washington, D.C. Dulles Intl
$2,218
Find similar

Air New Zealand flights from Washington, D.C. Dulles Intl Airport to Sydney

Our best Air New Zealand deals on Washington, D.C. Dulles Intl Airport to Sydney flight tickets
Air New Zealand
10 Feb
IAD12:40Washington, D.C. Dulles Intl
29h 50m
2 stops
SYD10:30Sydney Kingsford Smith
24 Feb
SYD11:20Sydney Kingsford Smith
21h 04m
1 stop
IAD16:24Washington, D.C. Dulles Intl
$2,253
Find similar
Air New Zealand
3 Feb
IAD15:19Washington, D.C. Dulles Intl
25h 26m
2 stops
SYD08:45Sydney Kingsford Smith
23 Feb
SYD12:10Sydney Kingsford Smith
20h 17m
1 stop
IAD16:27Washington, D.C. Dulles Intl
$2,255
Find similar
Air New Zealand
24 Jan
IAD17:45Washington, D.C. Dulles Intl
47h 00m
2 stops
SYD08:45Sydney Kingsford Smith
8 Feb
SYD11:20Sydney Kingsford Smith
25h 59m
1 stop
IAD21:19Washington, D.C. Dulles Intl
$2,272
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 16 November 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

Thu 11/12

05:45-09:00

2 stops35h 15m

Sydney Kingsford Smith

Thu 18/12

11:20-11:38

2 stops40h 18m

$1,799

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

Tue 17/2

13:13-09:35

2 stops28h 22m

Sydney Kingsford Smith

Tue 26/5

09:20-07:46

2 stops36h 26m

$2,018

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

Mon 23/2

09:45-09:35

2 stops31h 50m

Sydney Kingsford Smith

Tue 3/3

11:20-20:54

2 stops25h 34m

$2,025

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

Tue 10/2

09:45-09:35

3 stops31h 50m

Sydney Kingsford Smith

Tue 24/2

11:20-20:54

2 stops25h 34m

$2,027

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

Sat 7/2

17:48-09:35

3 stops47h 47m

Sydney Kingsford Smith

Tue 17/2

11:20-20:54

2 stops25h 34m

$2,028

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

Mon 23/2

09:45-09:35

3 stops31h 50m

Sydney Kingsford Smith

Tue 3/3

11:20-20:54

2 stops25h 34m

$2,036

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

Wed 25/2

09:45-09:35

3 stops31h 50m

Sydney Kingsford Smith

Wed 11/3

10:20-11:29

3 stops40h 09m

$2,038

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

Fri 20/2

09:45-09:35

2 stops31h 50m

Sydney Kingsford Smith

Tue 10/3

10:20-20:54

2 stops25h 34m

$2,079

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

Fri 13/2

09:45-09:35

3 stops31h 50m

Sydney Kingsford Smith

Sun 22/2

11:20-20:54

2 stops25h 34m

$2,088

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

Fri 20/2

09:45-09:35

3 stops31h 50m

Sydney Kingsford Smith

Tue 10/3

10:20-20:54

2 stops25h 34m

$2,090

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 typical price of a round-trip flight between Washington, D.C. Dulles Intl Airport and Sydney?

What is the cheapest month to fly to Sydney?

The month of May is, on average, the cheapest month to fly to Sydney from Washington, D.C. Dulles Intl Airport, with most prices found around $1,357. If you aren’t able to travel to Sydney during the month of May, then flying in February is also cheap. Prices for this month can be found on momondo for an average of $1,400.

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 $2,108. The most expensive day to fly to Sydney is Thursday, with ticket prices averaging around $2,353.

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 $2,136. 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 $2,962 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 $1,914 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 $953 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 November 2025, prices for Washington, D.C. Dulles Intl Airport to Sydney flights are approximately 40% 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.
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  • 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 22h 38m, 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 $2,380Free cancellationRating
7.4
9,013 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
Cronulla
Randwick
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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