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Cheap flights from Washington, D.C. to Sydney from $747

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 19/10. 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

Logo
06:15 - 08:05IAD-SYD
34h 50m2 stops
Logo
13:05 - 23:29SYD-IAD
25h 24m2 stops
$1,506
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Sun, 19 Oct - Fri, 31 Oct
Logo
06:15 - 08:05IAD-SYD
34h 50m2 stops
Logo
14:05 - 01:11SYD-IAD
26h 06m2 stops
$1,551
Find Deal
Mon, 20 Oct - Sun, 2 Nov
Qantas Airways Logo
15:23 - 21:55BWI-SYD
38h 32m2 stops
Qantas Airways Logo
14:05 - 23:02SYD-BWI
24h 57m1 stop
$1,666Qantas Airways
Find Deal
Wed, 12 Nov - Wed, 19 Nov
Qantas Airways Logo
15:23 - 06:55BWI-SYD
23h 32m1 stop
Qantas Airways Logo
06:05 - 18:17SYD-BWI
28h 12m2 stops
$1,678Qantas Airways
Find Deal
Tue, 11 Nov - Sun, 23 Nov
Alaska Airlines Logo
18:13 - 19:45IAD-SYD
34h 32m2 stops
Alaska Airlines Logo
21:40 - 06:23SYD-IAD
24h 43m2 stops
$1,708Alaska Airlines
Find Deal
Wed, 29 Oct - Sun, 16 Nov
Alaska Airlines Logo
18:13 - 19:45IAD-SYD
34h 32m2 stops
Alaska Airlines Logo
21:40 - 06:23SYD-IAD
24h 43m2 stops
$1,736Alaska Airlines
Find Deal
Tue, 28 Oct - Sun, 16 Nov
Air New Zealand Logo
12:38 - 08:45IAD-SYD
28h 07m2 stops
Air New Zealand Logo
11:45 - 00:24SYD-IAD
27h 39m2 stops
$1,932Air New Zealand
Find Deal
Wed, 25 Feb - Wed, 11 Mar
Air New Zealand Logo
05:00 - 07:45IAD-SYD
34h 45m2 stops
Air New Zealand Logo
09:55 - 23:44SYD-IAD
29h 49m2 stops
$1,933Air New Zealand
Find Deal
Sun, 2 Nov - Mon, 17 Nov
Fiji Airways Logo
17:01 - 13:00DCA-SYD
27h 59m2 stops
Fiji Airways Logo
14:00 - 21:00SYD-DCA
23h 00m2 stops
$1,951Fiji Airways
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Thu, 4 Dec - Thu, 11 Dec
Fiji Airways Logo
19:35 - 11:45DCA-SYD
26h 10m2 stops
Fiji Airways Logo
14:45 - 23:00SYD-DCA
23h 15m2 stops
$1,965Fiji Airways
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Sat, 27 Sep - Sat, 18 Oct

Air New Zealand flights from Washington, D.C. to Sydney

Our best Air New Zealand deals on Washington, D.C. to Sydney flight tickets
Air New Zealand
25 Feb
IAD12:38Washington, D.C. Dulles Intl
28h 07m
2 stops
SYD08:45Sydney Kingsford Smith
11 Mar
SYD11:45Sydney Kingsford Smith
27h 39m
2 stops
IAD00:24Washington, D.C. Dulles Intl
$1,932
Find similar
Air New Zealand
2 Nov
IAD05:00Washington, D.C. Dulles Intl
34h 45m
2 stops
SYD07:45Sydney Kingsford Smith
17 Nov
SYD09:55Sydney Kingsford Smith
29h 49m
2 stops
IAD23:44Washington, D.C. Dulles Intl
$1,933
Find similar
Air New Zealand
25 Feb
IAD12:38Washington, D.C. Dulles Intl
28h 07m
2 stops
SYD08:45Sydney Kingsford Smith
11 Mar
SYD13:55Sydney Kingsford Smith
25h 29m
2 stops
IAD00:24Washington, D.C. Dulles Intl
$1,935
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
12 Nov
BWI15:23Baltimore/Washington
38h 32m
2 stops
SYD21:55Sydney Kingsford Smith
19 Nov
SYD14:05Sydney Kingsford Smith
24h 57m
1 stop
BWI23:02Baltimore/Washington
$1,666
Find similar
Qantas Airways
11 Nov
BWI15:23Baltimore/Washington
23h 32m
1 stop
SYD06:55Sydney Kingsford Smith
23 Nov
SYD06:05Sydney Kingsford Smith
28h 12m
2 stops
BWI18:17Baltimore/Washington
$1,678
Find similar
Qantas Airways
11 Nov
BWI15:23Baltimore/Washington
23h 32m
1 stop
SYD06:55Sydney Kingsford Smith
23 Nov
SYD06:05Sydney Kingsford Smith
24h 10m
2 stops
BWI14:15Baltimore/Washington
$1,679
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 15 September 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

Sun 19/10

06:15-08:05

2 stops34h 50m

Sydney Kingsford Smith

Fri 31/10

13:05-23:29

2 stops25h 24m

$1,506

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

Mon 20/10

06:15-08:05

2 stops34h 50m

Sydney Kingsford Smith

Sun 2/11

14:05-01:11

2 stops26h 06m

$1,551

BaltimoreSydney

BWI - SYD

BWISYD

Baltimore/Washington

Wed 12/11

15:23-21:55

2 stops38h 32m

Sydney Kingsford Smith

Wed 19/11

14:05-23:02

1 stop24h 57m

$1,666

BaltimoreSydney

BWI - SYD

BWISYD

Baltimore/Washington

Tue 11/11

15:23-06:55

1 stop23h 32m

Sydney Kingsford Smith

Sun 23/11

06:05-18:17

2 stops28h 12m

$1,678

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

Wed 29/10

18:13-19:45

2 stops34h 32m

Sydney Kingsford Smith

Sun 16/11

21:40-06:23

2 stops24h 43m

$1,708

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

Tue 28/10

18:13-19:45

2 stops34h 32m

Sydney Kingsford Smith

Sun 16/11

21:40-06:23

2 stops24h 43m

$1,736

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

Wed 25/2

12:38-08:45

2 stops28h 07m

Sydney Kingsford Smith

Wed 11/3

11:45-00:24

2 stops27h 39m

$1,932

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

Sun 2/11

05:00-07:45

2 stops34h 45m

Sydney Kingsford Smith

Mon 17/11

09:55-23:44

2 stops29h 49m

$1,933

Washington, D.C.Sydney

DCA - SYD

DCASYD

Washington, D.C. Reagan-National

Thu 4/12

17:01-13:00

2 stops27h 59m

Sydney Kingsford Smith

Thu 11/12

14:00-21:00

2 stops23h 00m

$1,951

Washington, D.C.Sydney

DCA - SYD

DCASYD

Washington, D.C. Reagan-National

Sat 27/9

19:35-11:45

2 stops26h 10m

Sydney Kingsford Smith

Sat 18/10

14:45-23:00

2 stops23h 15m

$1,965

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 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 $1,296. 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 $1,354.

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 $2,071. The most expensive day to fly to Sydney is Thursday, with ticket prices averaging around $2,312.

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 $2,099. 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 $2,910 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 $1,979 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 $803 on momondo.

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

You could potentially save up to 14% 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 September 2025, prices for Washington, D.C. to Sydney flights are approximately 62% 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 32m.

  • 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 $2,179Free cancellationRating
7.4
8,929 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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