Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

Cheap flights from Washington, D.C. Dulles Intl Airport to Sydney from $799

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 9/2. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names, great deals

Big names, great deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customise your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

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.
Air Canada Logo
09:45 - 09:35
IAD
-
SYD
31h 50m2 stops
Air Canada Logo
11:20 - 11:35
SYD
-
IAD
40h 15m2 stops
$1,507Air Canada
Tue, 3 Feb - Tue, 10 Feb
Air Canada Logo
09:45 - 09:35
IAD
-
SYD
31h 50m2 stops
Air Canada Logo
11:20 - 20:54
SYD
-
IAD
25h 34m2 stops
$1,508Air Canada
Tue, 27 Jan - Tue, 3 Feb
Air Canada Logo
09:45 - 09:35
IAD
-
SYD
31h 50m2 stops
Air Canada Logo
09:20 - 20:29
SYD
-
IAD
25h 09m2 stops
$1,513Air Canada
Tue, 17 Feb - Tue, 26 May
Air Canada Logo
22:06 - 09:35
IAD
-
SYD
43h 29m2 stops
Air Canada Logo
11:20 - 20:54
SYD
-
IAD
25h 34m2 stops
$1,516Air Canada
Mon, 26 Jan - Mon, 2 Feb
Air Canada Logo
09:45 - 09:35
IAD
-
SYD
31h 50m3 stops
Air Canada Logo
11:20 - 11:35
SYD
-
IAD
40h 15m2 stops
$1,517Air Canada
Tue, 3 Feb - Tue, 10 Feb
Air Canada Logo
09:00 - 09:35
IAD
-
SYD
32h 35m1 stop
Air Canada Logo
11:20 - 11:35
SYD
-
IAD
40h 15m2 stops
$1,520Air Canada
Tue, 3 Feb - Tue, 10 Feb
Air Canada Logo
22:06 - 09:35
IAD
-
SYD
43h 29m2 stops
Air Canada Logo
11:20 - 11:35
SYD
-
IAD
40h 15m3 stops
$1,522Air Canada
Mon, 26 Jan - Mon, 2 Feb
Air Canada Logo
22:09 - 09:35
IAD
-
SYD
43h 26m1 stop
Air Canada Logo
09:20 - 20:29
SYD
-
IAD
25h 09m2 stops
$1,525Air Canada
Tue, 17 Feb - Tue, 26 May
Air Canada Logo
09:45 - 09:35
IAD
-
SYD
31h 50m3 stops
Air Canada Logo
07:00 - 06:25
SYD
-
IAD
37h 25m2 stops
$1,535Air Canada
Tue, 17 Feb - Tue, 26 May
Air Canada Logo
22:09 - 09:35
IAD
-
SYD
43h 26m1 stop
Air Canada Logo
07:00 - 06:25
SYD
-
IAD
37h 25m2 stops
$1,537Air Canada
Tue, 17 Feb - Tue, 26 May

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

Our best Air Canada deals on Washington, D.C. Dulles Intl Airport to Sydney flight tickets
Air Canada
3 Feb
IAD09:45Washington, D.C. Dulles Intl
31h 50m
2 stops
SYD09:35Sydney Kingsford Smith
10 Feb
SYD11:20Sydney Kingsford Smith
40h 15m
2 stops
IAD11:35Washington, D.C. Dulles Intl
$1,507
Find similar
Air Canada
27 Jan
IAD09:45Washington, D.C. Dulles Intl
31h 50m
2 stops
SYD09:35Sydney Kingsford Smith
3 Feb
SYD11:20Sydney Kingsford Smith
25h 34m
2 stops
IAD20:54Washington, D.C. Dulles Intl
$1,508
Find similar
Air Canada
17 Feb
IAD09:45Washington, D.C. Dulles Intl
31h 50m
2 stops
SYD09:35Sydney Kingsford Smith
26 May
SYD09:20Sydney Kingsford Smith
25h 09m
2 stops
IAD20:29Washington, D.C. Dulles Intl
$1,513
Find similar

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

Our best United Airlines deals on Washington, D.C. Dulles Intl Airport to Sydney flight tickets
United Airlines
24 Dec
IAD16:10Washington, D.C. Dulles Intl
22h 10m
1 stop
SYD06:20Sydney Kingsford Smith
10 Jan
SYD14:00Sydney Kingsford Smith
26h 59m
1 stop
IAD00:59Washington, D.C. Dulles Intl
$2,874
Find similar
United Airlines
23 Dec
IAD18:37Washington, D.C. Dulles Intl
43h 43m
1 stop
SYD06:20Sydney Kingsford Smith
23 Jan
SYD12:10Sydney Kingsford Smith
23h 25m
1 stop
IAD19:35Washington, D.C. Dulles Intl
$2,901
Find similar
United Airlines
25 Dec
IAD18:01Washington, D.C. Dulles Intl
44h 19m
1 stop
SYD06:20Sydney Kingsford Smith
21 Jan
SYD11:50Sydney Kingsford Smith
20h 24m
1 stop
IAD16:14Washington, D.C. Dulles Intl
$2,903
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 14 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

Fly to

Route

Depart

Return

Price

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

Tue 3/2

09:45-09:35

2 stops31h 50m

Sydney Kingsford Smith

Tue 10/2

11:20-11:35

2 stops40h 15m

$1,507

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

Tue 27/1

09:45-09:35

2 stops31h 50m

Sydney Kingsford Smith

Tue 3/2

11:20-20:54

2 stops25h 34m

$1,508

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

Tue 17/2

09:45-09:35

2 stops31h 50m

Sydney Kingsford Smith

Tue 26/5

09:20-20:29

2 stops25h 09m

$1,513

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

Mon 26/1

22:06-09:35

2 stops43h 29m

Sydney Kingsford Smith

Mon 2/2

11:20-20:54

2 stops25h 34m

$1,516

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

Tue 3/2

09:45-09:35

3 stops31h 50m

Sydney Kingsford Smith

Tue 10/2

11:20-11:35

2 stops40h 15m

$1,517

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

Tue 3/2

09:00-09:35

1 stop32h 35m

Sydney Kingsford Smith

Tue 10/2

11:20-11:35

2 stops40h 15m

$1,520

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

Mon 26/1

22:06-09:35

2 stops43h 29m

Sydney Kingsford Smith

Mon 2/2

11:20-11:35

3 stops40h 15m

$1,522

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

Tue 17/2

22:09-09:35

1 stop43h 26m

Sydney Kingsford Smith

Tue 26/5

09:20-20:29

2 stops25h 09m

$1,525

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

Tue 17/2

09:45-09:35

3 stops31h 50m

Sydney Kingsford Smith

Tue 26/5

07:00-06:25

2 stops37h 25m

$1,535

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

Tue 17/2

22:09-09:35

1 stop43h 26m

Sydney Kingsford Smith

Tue 26/5

07:00-06:25

2 stops37h 25m

$1,537

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

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 $1,322. 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 $1,367.

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 $2,070. The most expensive day to fly to Sydney is Thursday, with ticket prices averaging around $2,311.

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 $2,098. 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 $2,909 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 $1,922 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 $936 on momondo.

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

You could potentially save up to 20% 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 December 2025, prices for Washington, D.C. Dulles Intl Airport to Sydney flights are approximately 66% 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

Fastest flight time

22h 10m

Direct flights

None
The fastest flight from Washington, D.C. Dulles Intl Airport to Sydney takes 22h 10m
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 22h 10m, 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 $2,338Free cancellationRating
7.4
9,092 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.

An easier way to manage your Sydney trip

We make it super easy to schedule, organise and travel with friends or family. Trips is free – and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Tue 13/1
Tue 20/1
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Australia