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Cheap flights from Washington, D.C. to Sydney from $641

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 5/12. 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. to Sydney

Cheap return flights

Enter your travel dates to find the best prices.
United Airlines Logo
15:59 - 09:05IAD-SYD
25h 06m2 stops
United Airlines Logo
11:20 - 16:26SYD-IAD
21h 06m1 stop
$1,296United Airlines
Find Deal
Wed, 26 Nov - Tue, 9 Dec
United Airlines Logo
12:50 - 07:00DCA-SYD
26h 10m1 stop
United Airlines Logo
12:10 - 16:49SYD-DCA
20h 39m1 stop
$1,296United Airlines
Find Deal
Wed, 26 Nov - Wed, 3 Dec
Delta Logo
12:40 - 06:50IAD-SYD
26h 10m2 stops
Delta Logo
10:40 - 11:00SYD-IAD
40h 20m2 stops
$1,302Delta
Find Deal
Sun, 8 Feb - Sun, 8 Mar
Delta Logo
13:40 - 06:50DCA-SYD
25h 10m2 stops
Delta Logo
13:15 - 21:13SYD-DCA
22h 58m2 stops
$1,302Delta
Find Deal
Sun, 8 Feb - Tue, 10 Mar
Multiple Airlines Logo
09:59 - 07:25DCA-SYD
29h 26m1 stop
Multiple Airlines Logo
21:25 - 17:32SYD-DCA
36h 07m1 stop
$1,328Multiple Airlines
Find Deal
Sun, 8 Feb - Tue, 17 Feb
Qantas Airways Logo
16:50 - 09:00DCA-SYD
24h 10m1 stop
Qantas Airways Logo
20:10 - 14:57SYD-DCA
34h 47m2 stops
$1,491Qantas Airways
Find Deal
Wed, 31 Dec - Mon, 12 Jan
Qantas Airways Logo
08:35 - 09:00DCA-SYD
32h 25m1 stop
Qantas Airways Logo
07:05 - 18:42SYD-DCA
27h 37m2 stops
$1,492Qantas Airways
Find Deal
Mon, 10 Nov - Sat, 15 Nov
American Airlines Logo
13:07 - 09:00DCA-SYD
27h 53m2 stops
American Airlines Logo
11:20 - 23:59SYD-DCA
28h 39m2 stops
$1,535American Airlines
Find Deal
Sat, 27 Dec - Tue, 30 Dec
American Airlines Logo
17:30 - 09:00DCA-SYD
24h 30m1 stop
American Airlines Logo
10:10 - 20:52SYD-DCA
25h 42m1 stop
$1,582American Airlines
Find Deal
Mon, 16 Mar - Wed, 1 Apr
Multiple Airlines Logo
12:59 - 10:55DCA-SYD
29h 56m2 stops
Multiple Airlines Logo
17:45 - 20:00SYD-DCA
42h 15m1 stop
$1,647Multiple Airlines
Find Deal
Tue, 25 Nov - Tue, 2 Dec

Delta flights from Washington, D.C. to Sydney

Our best Delta deals on Washington, D.C. to Sydney flight tickets
Delta
8 Feb
IAD12:40Washington, D.C. Dulles Intl
26h 10m
2 stops
SYD06:50Sydney Kingsford Smith
8 Mar
SYD10:40Sydney Kingsford Smith
40h 20m
2 stops
IAD11:00Washington, D.C. Dulles Intl
$1,302
Find similar
Delta
14 Feb
DCA17:10Washington, D.C. Reagan-National
23h 20m
1 stop
SYD08:30Sydney Kingsford Smith
13 Mar
SYD09:40Sydney Kingsford Smith
21h 16m
1 stop
DCA15:56Washington, D.C. Reagan-National
$1,305
Find similar
Delta
12 Feb
IAD13:00Washington, D.C. Dulles Intl
25h 50m
2 stops
SYD06:50Sydney Kingsford Smith
9 Mar
SYD10:40Sydney Kingsford Smith
23h 02m
2 stops
IAD18:42Washington, D.C. Dulles Intl
$1,306
Find similar

Qantas Airways flights from Washington, D.C. to Sydney

Our best Qantas Airways deals on Washington, D.C. to Sydney flight tickets
Qantas Airways
31 Dec
DCA16:50Washington, D.C. Reagan-National
24h 10m
1 stop
SYD09:00Sydney Kingsford Smith
12 Jan
SYD20:10Sydney Kingsford Smith
34h 47m
2 stops
DCA14:57Washington, D.C. Reagan-National
$1,491
Find similar
Qantas Airways
10 Nov
DCA08:35Washington, D.C. Reagan-National
32h 25m
1 stop
SYD09:00Sydney Kingsford Smith
15 Nov
SYD07:05Sydney Kingsford Smith
27h 37m
2 stops
DCA18:42Washington, D.C. Reagan-National
$1,492
Find similar
Qantas Airways
30 Oct
DCA17:21Washington, D.C. Reagan-National
24h 39m
1 stop
SYD09:00Sydney Kingsford Smith
1 Nov
SYD21:55Sydney Kingsford Smith
31h 55m
2 stops
DCA14:50Washington, D.C. Reagan-National
$1,495
Find similar

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 October 2025.
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

Wed 26/11

15:59-09:05

2 stops25h 06m

Sydney Kingsford Smith

Tue 9/12

11:20-16:26

1 stop21h 06m

$1,296

Washington, D.C.Sydney

DCA - SYD

DCASYD

Washington, D.C. Reagan-National

Wed 26/11

12:50-07:00

1 stop26h 10m

Sydney Kingsford Smith

Wed 3/12

12:10-16:49

1 stop20h 39m

$1,296

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

Sun 8/2

12:40-06:50

2 stops26h 10m

Sydney Kingsford Smith

Sun 8/3

10:40-11:00

2 stops40h 20m

$1,302

Washington, D.C.Sydney

DCA - SYD

DCASYD

Washington, D.C. Reagan-National

Sun 8/2

13:40-06:50

2 stops25h 10m

Sydney Kingsford Smith

Tue 10/3

13:15-21:13

2 stops22h 58m

$1,302

Washington, D.C.Sydney

DCA - SYD

DCASYD

Washington, D.C. Reagan-National

Sun 8/2

09:59-07:25

1 stop29h 26m

Sydney Kingsford Smith

Tue 17/2

21:25-17:32

1 stop36h 07m

$1,328

Washington, D.C.Sydney

DCA - SYD

DCASYD

Washington, D.C. Reagan-National

Wed 31/12

16:50-09:00

1 stop24h 10m

Sydney Kingsford Smith

Mon 12/1

20:10-14:57

2 stops34h 47m

$1,491

Washington, D.C.Sydney

DCA - SYD

DCASYD

Washington, D.C. Reagan-National

Mon 10/11

08:35-09:00

1 stop32h 25m

Sydney Kingsford Smith

Sat 15/11

07:05-18:42

2 stops27h 37m

$1,492

Washington, D.C.Sydney

DCA - SYD

DCASYD

Washington, D.C. Reagan-National

Sat 27/12

13:07-09:00

2 stops27h 53m

Sydney Kingsford Smith

Tue 30/12

11:20-23:59

2 stops28h 39m

$1,535

Washington, D.C.Sydney

DCA - SYD

DCASYD

Washington, D.C. Reagan-National

Mon 16/3

17:30-09:00

1 stop24h 30m

Sydney Kingsford Smith

Wed 1/4

10:10-20:52

1 stop25h 42m

$1,582

Washington, D.C.Sydney

DCA - SYD

DCASYD

Washington, D.C. Reagan-National

Tue 25/11

12:59-10:55

2 stops29h 56m

Sydney Kingsford Smith

Tue 2/12

17:45-20:00

1 stop42h 15m

$1,647

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 August is, on average, the cheapest month to fly to Sydney from Washington, D.C., with most prices found around $1,312. If you aren’t able to travel to Sydney during the month of August, then flying in April is also cheap. Prices for this month can be found on momondo for an average of $1,370.

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 $2,098. The most expensive day to fly to Sydney is Thursday, with ticket prices averaging around $2,342.

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. to Sydney in the morning for as low as $2,126. 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 $2,948 on average. Flights to Sydney from Washington, D.C. 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. when booking weeks ahead of your departure date. In general, you can expect to find flights to Sydney for around $1,944 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 $813 on momondo.

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

As of October 2025, prices for Washington, D.C. to Sydney flights are approximately 54% cheaper 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

Direct flights

None
There are no direct flights from Washington, D.C. to Sydney. There are no popular flight routes from Washington, D.C. to Sydney.
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  • 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 23h 00m.

  • 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 $2,207Free cancellationRating
7.4
9,001 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
Randwick
Cronulla
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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