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Cheap flights from Washington, D.C. to Sydney from $722

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. to Sydney departing on 23/2. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Washington, D.C. to Sydney

Cheap return flights

Enter your travel dates to find the best prices.
Air New Zealand Logo
09:55 - 07:20
IAD
-
SYD
31h 25m
2 stops
Air New Zealand Logo
09:20 - 20:37
SYD
-
IAD
25h 17m
2 stops
$1,652Air New Zealand
Sat, 25 Apr - Fri, 1 May
Air New Zealand Logo
09:55 - 07:20
IAD
-
SYD
31h 25m
1 stop
Air New Zealand Logo
09:20 - 07:50
SYD
-
IAD
36h 30m
2 stops
$1,653Air New Zealand
Thu, 14 May - Sun, 17 May
Multiple Airlines Logo
09:00 - 07:20
IAD
-
SYD
32h 20m
1 stop
Multiple Airlines Logo
09:20 - 20:37
SYD
-
IAD
25h 17m
2 stops
$1,659Multiple Airlines
Fri, 24 Apr - Fri, 1 May
Multiple Airlines Logo
09:59 - 07:25
DCA
-
SYD
30h 26m
1 stop
Multiple Airlines Logo
14:00 - 20:00
SYD
-
DCA
45h 00m
2 stops
$1,673Multiple Airlines
Tue, 17 Mar - Tue, 24 Mar
Multiple Airlines Logo
09:59 - 07:30
DCA
-
SYD
31h 31m
1 stop
Multiple Airlines Logo
13:15 - 20:00
SYD
-
DCA
44h 45m
2 stops
$1,689Multiple Airlines
Tue, 28 Apr - Tue, 5 May
Air Canada Logo
12:43 - 09:35
IAD
-
SYD
28h 52m
2 stops
Air Canada Logo
10:20 - 21:23
SYD
-
IAD
26h 03m
2 stops
$1,696Air Canada
Tue, 3 Mar - Tue, 17 Mar
Air Canada Logo
09:45 - 09:35
IAD
-
SYD
31h 50m
2 stops
Air Canada Logo
10:20 - 20:26
SYD
-
IAD
25h 06m
2 stops
$1,698Air Canada
Tue, 24 Feb - Tue, 17 Mar
Air Canada Logo
16:30 - 09:35
IAD
-
SYD
25h 05m
2 stops
Air Canada Logo
10:20 - 20:26
SYD
-
IAD
25h 06m
2 stops
$1,705Air Canada
Wed, 25 Feb - Wed, 11 Mar
Qantas Airways Logo
16:59 - 09:20
DCA
-
SYD
25h 21m
2 stops
Qantas Airways Logo
13:05 - 19:46
SYD
-
DCA
21h 41m
1 stop
$1,776Qantas Airways
Mon, 9 Mar - Mon, 16 Mar
Qantas Airways Logo
15:41 - 10:55
BWI
-
SYD
27h 14m
2 stops
Qantas Airways Logo
13:05 - 22:59
SYD
-
BWI
24h 54m
1 stop
$1,793Qantas Airways
Mon, 9 Feb - Tue, 17 Mar

United Airlines flights from Washington, D.C. to Sydney

Our best United Airlines deals on Washington, D.C. to Sydney flight tickets
United Airlines
1 Feb
IAD14:10Washington, D.C. Dulles Intl
24h 10m
1 stop
SYD06:20Sydney Kingsford Smith
15 Feb
SYD14:00Sydney Kingsford Smith
21h 27m
1 stop
IAD19:27Washington, D.C. Dulles Intl
$1,966
United Airlines
1 Apr
BWI18:15Baltimore/Washington
22h 40m
1 stop
SYD07:55Sydney Kingsford Smith
28 Apr
SYD09:30Sydney Kingsford Smith
21h 38m
1 stop
BWI17:08Baltimore/Washington
$1,970
United Airlines
22 Apr
BWI18:15Baltimore/Washington
22h 40m
1 stop
SYD06:55Sydney Kingsford Smith
29 Apr
SYD09:30Sydney Kingsford Smith
22h 52m
1 stop
BWI18:22Baltimore/Washington
$1,972

American Airlines flights from Washington, D.C. to Sydney

Our best American Airlines deals on Washington, D.C. to Sydney flight tickets
American Airlines
15 Mar
DCA15:49Washington, D.C. Reagan-National
26h 11m
2 stops
SYD09:00Sydney Kingsford Smith
22 Mar
SYD11:20Sydney Kingsford Smith
24h 21m
1 stop
DCA20:41Washington, D.C. Reagan-National
$1,936
American Airlines
1 Feb
BWI14:46Baltimore/Washington
26h 14m
2 stops
SYD09:00Sydney Kingsford Smith
15 Feb
SYD11:20Sydney Kingsford Smith
22h 58m
2 stops
BWI18:18Baltimore/Washington
$1,940
American Airlines
1 Feb
BWI14:46Baltimore/Washington
26h 14m
2 stops
SYD09:00Sydney Kingsford Smith
15 Feb
SYD14:05Sydney Kingsford Smith
20h 13m
1 stop
BWI18:18Baltimore/Washington
$1,942

momondo Fare Finder

 
Customise your flight search to find flights from Washington, D.C. 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 January 2026.
Use the filters below to find and compare flights from Washington, D.C. 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

Sat 25/4

09:55-07:20

2 stops31h 25m

Sydney Kingsford Smith

Fri 1/5

09:20-20:37

2 stops25h 17m

$1,652

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

Thu 14/5

09:55-07:20

1 stop31h 25m

Sydney Kingsford Smith

Sun 17/5

09:20-07:50

2 stops36h 30m

$1,653

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

Fri 24/4

09:00-07:20

1 stop32h 20m

Sydney Kingsford Smith

Fri 1/5

09:20-20:37

2 stops25h 17m

$1,659

Washington, D.C.Sydney

DCA - SYD

DCASYD

Washington, D.C. Reagan-National

Tue 17/3

09:59-07:25

1 stop30h 26m

Sydney Kingsford Smith

Tue 24/3

14:00-20:00

2 stops45h 00m

$1,673

Washington, D.C.Sydney

DCA - SYD

DCASYD

Washington, D.C. Reagan-National

Tue 28/4

09:59-07:30

1 stop31h 31m

Sydney Kingsford Smith

Tue 5/5

13:15-20:00

2 stops44h 45m

$1,689

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

Tue 3/3

12:43-09:35

2 stops28h 52m

Sydney Kingsford Smith

Tue 17/3

10:20-21:23

2 stops26h 03m

$1,696

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 17/3

10:20-20:26

2 stops25h 06m

$1,698

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

Wed 25/2

16:30-09:35

2 stops25h 05m

Sydney Kingsford Smith

Wed 11/3

10:20-20:26

2 stops25h 06m

$1,705

Washington, D.C.Sydney

DCA - SYD

DCASYD

Washington, D.C. Reagan-National

Mon 9/3

16:59-09:20

2 stops25h 21m

Sydney Kingsford Smith

Mon 16/3

13:05-19:46

1 stop21h 41m

$1,776

BaltimoreSydney

BWI - SYD

BWISYD

Baltimore/Washington

Mon 9/2

15:41-10:55

2 stops27h 14m

Sydney Kingsford Smith

Tue 17/3

13:05-22:59

1 stop24h 54m

$1,793

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. 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. and Sydney?

What is the cheapest month to fly to Sydney?

The month of April is, on average, the cheapest month to fly to Sydney from Washington, D.C., with most prices found around $1,241. If you aren’t able to travel to Sydney during the month of April, then flying in August is also cheap. Prices for this month can be found on momondo for an average of $1,242.

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. when booking weeks ahead of your departure date. In general, you can expect to find flights to Sydney for around $1,939 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. for as low as $935 on momondo.

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

You could potentially save up to 47% on your flight if you consider stops on a Washington, D.C. to Sydney flight.

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

As of January 2026, prices for Washington, D.C. to Sydney flights are approximately 52% more expensive when compared to flights at the same time last year.

When to book flights from Washington, D.C. to Sydney

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

Cheap Washington, D.C. to Sydney (WAS to SYD) flight deals and tips

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

Fastest flight time

22h 24m

Direct flights

None
The fastest flight from Washington, D.C. to Sydney takes 22h 24m
There are no direct flights from Washington, D.C. to Sydney. There are no popular flight routes from Washington, D.C. to Sydney.
Search flight deals

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

    Washington, D.C. and Sydney Kingsford Smith are 15700.1 km apart from one another. By plane, this route typically takes 22h 24m.

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

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

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

  • How old do you have to be to fly from Washington, D.C. 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. 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 licence, 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. to Sydney?

Best airlines flying from Washington, D.C. to Sydney

Compare and see reviews for airlines that fly from Washington, D.C. to Sydney with momondo
Airline
Rating
Free cancellation
Price
United AirlinesPriceFrom $2,070Free cancellationRating
7.4
9,215 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
Coogee
Bondi Beach
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?

Flights from Washington, D.C. to Sydney with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

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

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Sydney from Washington, D.C..

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

Of course. momondo tracks the price of Washington, D.C. to Sydney flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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