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Cheap flights from Washington, D.C. Dulles Intl Airport to Sydney from $430

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 12/5. 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 round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
3:59 pm - 9:05 amIAD-SYD
25h 06m2 stops
United Airlines Logo
12:10 pm - 7:26 pmSYD-IAD
23h 16m1 stop
$851United Airlines
Find Deal
Wed, Nov 26 - Wed, Dec 3
United Airlines Logo
12:45 pm - 7:00 amIAD-SYD
26h 15m2 stops
United Airlines Logo
2:00 pm - 8:55 pmSYD-IAD
22h 55m1 stop
$854United Airlines
Find Deal
Thu, Nov 27 - Tue, Dec 9
Delta Logo
11:05 am - 8:30 amIAD-SYD
29h 25m2 stops
Delta Logo
10:40 am - 5:00 pmSYD-IAD
22h 20m2 stops
$855Delta
Find Deal
Tue, Nov 11 - Wed, Dec 10
United Airlines Logo
3:59 pm - 9:05 amIAD-SYD
26h 06m2 stops
United Airlines Logo
11:50 am - 4:16 pmSYD-IAD
20h 26m1 stop
$857United Airlines
Find Deal
Sat, Nov 1 - Fri, Nov 7
Delta Logo
3:00 pm - 7:30 amIAD-SYD
25h 30m2 stops
Delta Logo
10:40 am - 11:33 pmSYD-IAD
28h 53m2 stops
$861Delta
Find Deal
Sat, Nov 1 - Sat, Nov 8
American Airlines Logo
1:58 pm - 9:00 amIAD-SYD
27h 02m2 stops
American Airlines Logo
11:20 am - 10:33 pmSYD-IAD
27h 13m2 stops
$1,046American Airlines
Find Deal
Mon, Dec 1 - Fri, Dec 19
Air Canada Logo
9:45 am - 9:35 amIAD-SYD
31h 50m2 stops
Air Canada Logo
11:20 am - 8:54 pmSYD-IAD
25h 34m2 stops
$1,117Air Canada
Find Deal
Fri, Nov 14 - Tue, Nov 25
Air Canada Logo
9:45 am - 9:35 amIAD-SYD
31h 50m3 stops
Air Canada Logo
11:20 am - 8:54 pmSYD-IAD
25h 34m2 stops
$1,124Air Canada
Find Deal
Fri, Nov 14 - Tue, Nov 25
Qantas Airways Logo
5:08 pm - 7:35 amIAD-SYD
46h 27m2 stops
Qantas Airways Logo
6:05 am - 5:17 pmSYD-IAD
27h 12m2 stops
$1,142Qantas Airways
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Fri, Dec 5 - Fri, Dec 19
American Airlines Logo
5:03 pm - 6:55 amIAD-SYD
21h 52m1 stop
American Airlines Logo
2:05 pm - 10:33 pmSYD-IAD
24h 28m1 stop
$1,247American Airlines
Find Deal
Sun, Nov 2 - Mon, Nov 17

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
Nov 11
IAD11:05 amWashington, D.C. Dulles Intl
29h 25m
2 stops
SYD8:30 amSydney Kingsford Smith
Dec 10
SYD10:40 amSydney Kingsford Smith
22h 20m
2 stops
IAD5:00 pmWashington, D.C. Dulles Intl
$855
Find similar
Delta
Nov 1
IAD3:00 pmWashington, D.C. Dulles Intl
25h 30m
2 stops
SYD7:30 amSydney Kingsford Smith
Nov 8
SYD10:40 amSydney Kingsford Smith
28h 53m
2 stops
IAD11:33 pmWashington, D.C. Dulles Intl
$861
Find similar
Delta
Nov 27
IAD1:00 pmWashington, D.C. Dulles Intl
27h 30m
2 stops
SYD8:30 amSydney Kingsford Smith
Dec 9
SYD10:40 amSydney Kingsford Smith
28h 49m
2 stops
IAD11:29 pmWashington, D.C. Dulles Intl
$1,288
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
Dec 1
IAD1:58 pmWashington, D.C. Dulles Intl
27h 02m
2 stops
SYD9:00 amSydney Kingsford Smith
Dec 19
SYD11:20 amSydney Kingsford Smith
27h 13m
2 stops
IAD10:33 pmWashington, D.C. Dulles Intl
$1,046
Find similar
American Airlines
Nov 2
IAD5:03 pmWashington, D.C. Dulles Intl
21h 52m
1 stop
SYD6:55 amSydney Kingsford Smith
Nov 17
SYD2:05 pmSydney Kingsford Smith
24h 28m
1 stop
IAD10:33 pmWashington, D.C. Dulles Intl
$1,247
Find similar
American Airlines
Nov 11
IAD6:04 amWashington, D.C. Dulles Intl
32h 51m
1 stop
SYD6:55 amSydney Kingsford Smith
Nov 23
SYD2:05 pmSydney Kingsford Smith
24h 36m
1 stop
IAD10:41 pmWashington, D.C. Dulles Intl
$1,248
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 October 29, 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 11/26

3:59 pm-9:05 am

2 stops25h 06m

Sydney Kingsford Smith

Wed 12/3

12:10 pm-7:26 pm

1 stop23h 16m

$851

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

Thu 11/27

12:45 pm-7:00 am

2 stops26h 15m

Sydney Kingsford Smith

Tue 12/9

2:00 pm-8:55 pm

1 stop22h 55m

$854

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

Tue 11/11

11:05 am-8:30 am

2 stops29h 25m

Sydney Kingsford Smith

Wed 12/10

10:40 am-5:00 pm

2 stops22h 20m

$855

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

Sat 11/1

3:59 pm-9:05 am

2 stops26h 06m

Sydney Kingsford Smith

Fri 11/7

11:50 am-4:16 pm

1 stop20h 26m

$857

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

Sat 11/1

3:00 pm-7:30 am

2 stops25h 30m

Sydney Kingsford Smith

Sat 11/8

10:40 am-11:33 pm

2 stops28h 53m

$861

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

Mon 12/1

1:58 pm-9:00 am

2 stops27h 02m

Sydney Kingsford Smith

Fri 12/19

11:20 am-10:33 pm

2 stops27h 13m

$1,046

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

Fri 11/14

9:45 am-9:35 am

2 stops31h 50m

Sydney Kingsford Smith

Tue 11/25

11:20 am-8:54 pm

2 stops25h 34m

$1,117

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

Fri 11/14

9:45 am-9:35 am

3 stops31h 50m

Sydney Kingsford Smith

Tue 11/25

11:20 am-8:54 pm

2 stops25h 34m

$1,124

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

Fri 12/5

5:08 pm-7:35 am

2 stops46h 27m

Sydney Kingsford Smith

Fri 12/19

6:05 am-5:17 pm

2 stops27h 12m

$1,142

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

Sun 11/2

5:03 pm-6:55 am

1 stop21h 52m

Sydney Kingsford Smith

Mon 11/17

2:05 pm-10:33 pm

1 stop24h 28m

$1,247

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, February 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 $920. If you are unable to visit Sydney during the month of February, then departing from Washington, D.C. Dulles Intl Airport during the month May is also very affordable. Most momondo users find prices during this month for around $926.

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 $1,277 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 $534 on momondo.

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

You could potentially save up to 47% 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 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

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?

    The straight-line distance from Washington, D.C. Dulles Intl to Sydney Kingsford Smith is 9734.0 mi. Typically, this will take 21h 52m 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
United AirlinesPriceFrom $511Free CancellationRating
7.4
9,001 reviews
Search United Airlines flights
DeltaPriceFrom $609Free CancellationRating
7.9
7,994 reviews
Search Delta flights
Qantas AirwaysPriceFrom $827Free CancellationRating
7.5
924 reviews
Search Qantas Airways flights
American AirlinesPriceFrom $830Free CancellationRating
7.2
11,032 reviews
Search American Airlines flights
Air CanadaPriceFrom $854Free CancellationRating
7.1
10,371 reviews
Search Air Canada flights
Air New ZealandPriceFrom $1,289Free CancellationRating
8.0
519 reviews
Search Air New Zealand flights
ANAPriceFrom $1,370Free CancellationRating
8.4
994 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
Manly
Penrith
Leura
Lithgow
Charlestown
Terrigal
Swansea

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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