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Cheap flights from Washington, D.C. Dulles Intl Airport to Sydney from $542

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 11/19. 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 (IAD-SYD)

Cheap round-trip flights

Air Canada Logo
9:35 am - 8:20 amIAD-SYD
31h 45m2 stops
Air Canada Logo
10:20 am - 8:59 pmSYD-IAD
25h 39m2 stops
$834Air Canada
Find Deal
Tue, Oct 21 - Sun, Oct 26
Air Canada Logo
9:35 am - 8:20 amIAD-SYD
31h 45m3 stops
Air Canada Logo
10:20 am - 8:59 pmSYD-IAD
25h 39m2 stops
$841Air Canada
Find Deal
Tue, Oct 21 - Sun, Oct 26
Air Canada Logo
9:55 am - 9:35 amIAD-SYD
31h 40m2 stops
Air Canada Logo
11:20 am - 8:29 pmSYD-IAD
25h 09m2 stops
$851Air Canada
Find Deal
Wed, Nov 19 - Wed, Nov 26
Air Canada Logo
9:55 am - 9:35 amIAD-SYD
31h 40m3 stops
Air Canada Logo
11:20 am - 8:29 pmSYD-IAD
25h 09m2 stops
$857Air Canada
Find Deal
Wed, Nov 19 - Wed, Nov 26
Air Canada Logo
9:55 am - 8:35 amIAD-SYD
31h 40m2 stops
Air Canada Logo
11:20 am - 8:59 pmSYD-IAD
25h 39m2 stops
$897Air Canada
Find Deal
Tue, Oct 28 - Sat, Nov 8
Air Canada Logo
9:55 am - 8:35 amIAD-SYD
31h 40m2 stops
Air Canada Logo
11:20 am - 8:59 pmSYD-IAD
25h 39m2 stops
$898Air Canada
Find Deal
Tue, Oct 28 - Sat, Nov 8
Air Canada Logo
1:20 pm - 9:35 amIAD-SYD
28h 15m2 stops
Air Canada Logo
11:20 am - 8:59 pmSYD-IAD
25h 39m2 stops
$901Air Canada
Find Deal
Sun, Nov 2 - Sat, Nov 8
Air Canada Logo
9:55 am - 8:35 amIAD-SYD
31h 40m3 stops
Air Canada Logo
11:20 am - 8:59 pmSYD-IAD
25h 39m2 stops
$904Air Canada
Find Deal
Tue, Oct 28 - Sat, Nov 8
Logo
6:10 am - 7:05 amIAD-SYD
34h 55m2 stops
Logo
1:10 pm - 12:06 amSYD-IAD
25h 56m2 stops
$1,093
Find Deal
Mon, Sep 22 - Mon, Oct 13
Air New Zealand Logo
8:30 am - 7:45 amIAD-SYD
33h 15m2 stops
Air New Zealand Logo
11:50 am - 12:45 amSYD-IAD
27h 55m2 stops
$1,236Air New Zealand
Find Deal
Sun, Sep 28 - Tue, Oct 21

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

Our best ANA deals on Washington, D.C. Dulles Intl Airport to Sydney flight tickets
ANA
Aug 10
IAD12:15 pmWashington, D.C. Dulles Intl
31h 10m
1 stop
SYD9:25 amSydney Kingsford Smith
Aug 25
SYD11:50 amSydney Kingsford Smith
41h 55m
1 stop
IAD3:45 pmWashington, D.C. Dulles Intl
$1,802
Find similar
ANA
Aug 11
IAD12:15 pmWashington, D.C. Dulles Intl
31h 10m
1 stop
SYD9:25 amSydney Kingsford Smith
Aug 25
SYD11:50 amSydney Kingsford Smith
36h 15m
1 stop
IAD10:05 amWashington, D.C. Dulles Intl
$1,805
Find similar
ANA
Aug 10
IAD3:39 pmWashington, D.C. Dulles Intl
27h 46m
2 stops
SYD9:25 amSydney Kingsford Smith
Aug 24
SYD11:50 amSydney Kingsford Smith
41h 55m
1 stop
IAD3:45 pmWashington, D.C. Dulles Intl
$1,806
Find similar

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

Our best Alaska Airlines deals on Washington, D.C. Dulles Intl Airport to Sydney flight tickets
Alaska Airlines
Aug 19
IAD8:19 pmWashington, D.C. Dulles Intl
33h 26m
2 stops
SYD7:45 pmSydney Kingsford Smith
Aug 30
SYD9:40 pmSydney Kingsford Smith
33h 07m
2 stops
IAD4:47 pmWashington, D.C. Dulles Intl
$1,477
Find similar
Alaska Airlines
Aug 10
IAD8:19 pmWashington, D.C. Dulles Intl
33h 26m
2 stops
SYD7:45 pmSydney Kingsford Smith
Aug 24
SYD9:40 pmSydney Kingsford Smith
33h 07m
2 stops
IAD4:47 pmWashington, D.C. Dulles Intl
$1,761
Find similar

momondo Fare Finder

 
Customize 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 832,500 searches. Data last updated August 5, 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 10/21

9:35 am-8:20 am

2 stops31h 45m

Sydney Kingsford Smith

Sun 10/26

10:20 am-8:59 pm

2 stops25h 39m

$834

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

Tue 10/21

9:35 am-8:20 am

3 stops31h 45m

Sydney Kingsford Smith

Sun 10/26

10:20 am-8:59 pm

2 stops25h 39m

$841

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

Wed 11/19

9:55 am-9:35 am

2 stops31h 40m

Sydney Kingsford Smith

Wed 11/26

11:20 am-8:29 pm

2 stops25h 09m

$851

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

Wed 11/19

9:55 am-9:35 am

3 stops31h 40m

Sydney Kingsford Smith

Wed 11/26

11:20 am-8:29 pm

2 stops25h 09m

$857

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

Tue 10/28

9:55 am-8:35 am

2 stops31h 40m

Sydney Kingsford Smith

Sat 11/8

11:20 am-8:59 pm

2 stops25h 39m

$897

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

Tue 10/28

9:55 am-8:35 am

2 stops31h 40m

Sydney Kingsford Smith

Sat 11/8

11:20 am-8:59 pm

2 stops25h 39m

$898

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

Sun 11/2

1:20 pm-9:35 am

2 stops28h 15m

Sydney Kingsford Smith

Sat 11/8

11:20 am-8:59 pm

2 stops25h 39m

$901

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

Tue 10/28

9:55 am-8:35 am

3 stops31h 40m

Sydney Kingsford Smith

Sat 11/8

11:20 am-8:59 pm

2 stops25h 39m

$904

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

Mon 9/22

6:10 am-7:05 am

2 stops34h 55m

Sydney Kingsford Smith

Mon 10/13

1:10 pm-12:06 am

2 stops25h 56m

$1,093

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

Sun 9/28

8:30 am-7:45 am

2 stops33h 15m

Sydney Kingsford Smith

Tue 10/21

11:50 am-12:45 am

2 stops27h 55m

$1,236

Flights are sorted by cheapest round-trip 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?

In general, April is the cheapest month to fly from Washington, D.C. Dulles Intl Airport to Sydney. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $927. If you are unable to visit Sydney during the month of April, then departing from Washington, D.C. Dulles Intl Airport during the month March is also very affordable. Most momondo users find prices during this month for around $981.

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

The cheapest day to depart from Washington, D.C. Dulles Intl Airport to Sydney is on a Tuesday when prices can be found for as low as $1,353. The most expensive day to fly to Sydney is Friday, with ticket prices averaging around $1,485.

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 at noon. momondo users have found flights departing from Washington, D.C. Dulles Intl Airport to Sydney at noon for as low as $1,219. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights to Sydney are more costly in the evening, with an average ticket price of $1,464. Departure times in the evening fall within the peak daily travel times, which is why tickets can be more expensive.

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 $1,300 when searching weeks out. 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 $1,054 on momondo.

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

You could potentially save up to 38% 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 August 2025, prices for Washington, D.C. Dulles Intl Airport to Sydney flights are approximately 20% 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 round-trip 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

Best Price Found

$542

Fastest flight time

21h 52m

Direct flights

None

Airports in Sydney

1 airport
The best one-way flight to Sydney from Washington, D.C. Dulles Intl Airport in the past 72 hours is $542. The best round-trip flight deal from Washington, D.C. Dulles Intl Airport to Sydney found on momondo in the last 72 hours is $834.
The fastest flight from Washington, D.C. Dulles Intl Airport to Sydney takes 21h 52m
There are no direct flights from Washington, D.C. Dulles Intl Airport to Sydney. Popular non-direct route for this connection is Washington, D.C. Dulles Intl Airport - Sydney Kingsford Smith Airport.
There is 1 airport near Sydney: Sydney Kingsford Smith (SYD)
Search flight deals

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

    The straight-line distance from Washington, D.C. Dulles Intl to Sydney Kingsford Smith is 9734.0 mi. Typically, this will take 25h 39m by plane in normal conditions.

  • 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 are updated 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 that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check 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 travel and health documents required for your trip to Sydney Kingsford Smith Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Sydney Kingsford Smith Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • 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
DeltaPriceFrom $609Free CancellationRating
8.0
7,985 reviews
Search Delta flights
American AirlinesPriceFrom $830Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
Qantas AirwaysPriceFrom $842Free CancellationRating
7.5
887 reviews
Search Qantas Airways flights
Air CanadaPriceFrom $1,036Free CancellationRating
7.1
9,890 reviews
Search Air Canada flights
United AirlinesPriceFrom $1,180Free CancellationRating
7.4
8,916 reviews
Search United Airlines flights
Air New ZealandPriceFrom $1,294Free CancellationRating
7.9
502 reviews
Search Air New Zealand flights
ANAPriceFrom $1,370Free CancellationRating
8.4
924 reviews
Search ANA flights

Traveling to a place near Sydney?

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

Why use momondo?

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

It is quick and easy to find Washington, D.C. to Sydney flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Sydney that suits you.

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

Yes. momondo enables you to select and highlight flights to Sydney from Washington, D.C. with this policy.

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?

If you are not ready to book a flight from Washington, D.C. to Sydney now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Sydney and let you know when they change.

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