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Cheap flights from Washington, D.C. Dulles Intl Airport to Sydney from $749

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 26/10. 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. Dulles Intl Airport to Sydney

Cheap return flights

Logo
06:15 - 09:00IAD-SYD
35h 45m2 stops
Logo
14:05 - 00:11SYD-IAD
26h 06m2 stops
$1,508
Find Deal
Mon, 27 Oct - Mon, 3 Nov
Alaska Airlines Logo
07:38 - 19:45IAD-SYD
44h 07m2 stops
Alaska Airlines Logo
21:40 - 06:13SYD-IAD
24h 33m2 stops
$1,756Alaska Airlines
Find Deal
Tue, 25 Nov - Mon, 22 Dec
Alaska Airlines Logo
18:34 - 19:45IAD-SYD
57h 11m2 stops
Alaska Airlines Logo
21:40 - 06:13SYD-IAD
24h 33m2 stops
$1,759Alaska Airlines
Find Deal
Wed, 26 Nov - Tue, 23 Dec
Alaska Airlines Logo
08:53 - 19:45IAD-SYD
43h 52m2 stops
Alaska Airlines Logo
21:40 - 00:23SYD-IAD
41h 43m2 stops
$1,772Alaska Airlines
Find Deal
Thu, 16 Oct - Thu, 23 Oct
Alaska Airlines Logo
18:55 - 19:45IAD-SYD
32h 50m2 stops
Alaska Airlines Logo
21:40 - 17:55SYD-IAD
35h 15m2 stops
$1,778Alaska Airlines
Find Deal
Tue, 24 Feb - Tue, 17 Mar
Alaska Airlines Logo
18:13 - 19:45IAD-SYD
34h 32m2 stops
Alaska Airlines Logo
21:40 - 16:40SYD-IAD
35h 00m1 stop
$1,792Alaska Airlines
Find Deal
Tue, 28 Oct - Tue, 18 Nov
Logo
11:30 - 12:30IAD-SYD
33h 00m2 stops
Logo
14:10 - 22:12SYD-IAD
24h 02m2 stops
$1,892
Find Deal
Sat, 21 Feb - Sat, 7 Mar
Air New Zealand Logo
12:38 - 08:45IAD-SYD
28h 07m2 stops
Air New Zealand Logo
13:55 - 00:24SYD-IAD
25h 29m2 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
11:45 - 22:12SYD-IAD
26h 27m2 stops
$1,933Air New Zealand
Find Deal
Sun, 2 Nov - Mon, 17 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
$1,935Air New Zealand
Find Deal
Tue, 3 Mar - Tue, 24 Mar

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

Our best Air New Zealand deals on Washington, D.C. Dulles Intl Airport 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
SYD13:55Sydney Kingsford Smith
25h 29m
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
SYD11:45Sydney Kingsford Smith
26h 27m
2 stops
IAD22:12Washington, D.C. Dulles Intl
$1,933
Find similar
Air New Zealand
3 Mar
IAD12:38Washington, D.C. Dulles Intl
28h 07m
2 stops
SYD08:45Sydney Kingsford Smith
24 Mar
SYD11:45Sydney Kingsford Smith
27h 39m
2 stops
IAD00:24Washington, D.C. Dulles Intl
$1,935
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
25 Nov
IAD07:38Washington, D.C. Dulles Intl
44h 07m
2 stops
SYD19:45Sydney Kingsford Smith
22 Dec
SYD21:40Sydney Kingsford Smith
24h 33m
2 stops
IAD06:13Washington, D.C. Dulles Intl
$1,756
Find similar
Alaska Airlines
26 Nov
IAD18:34Washington, D.C. Dulles Intl
57h 11m
2 stops
SYD19:45Sydney Kingsford Smith
23 Dec
SYD21:40Sydney Kingsford Smith
24h 33m
2 stops
IAD06:13Washington, D.C. Dulles Intl
$1,759
Find similar
Alaska Airlines
16 Oct
IAD08:53Washington, D.C. Dulles Intl
43h 52m
2 stops
SYD19:45Sydney Kingsford Smith
23 Oct
SYD21:40Sydney Kingsford Smith
41h 43m
2 stops
IAD00:23Washington, D.C. Dulles Intl
$1,772
Find similar

momondo Fare Finder

 
Customise 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 78,305 searches. Data last updated 14 September 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

Mon 27/10

06:15-09:00

2 stops35h 45m

Sydney Kingsford Smith

Mon 3/11

14:05-00:11

2 stops26h 06m

$1,508

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

Tue 25/11

07:38-19:45

2 stops44h 07m

Sydney Kingsford Smith

Mon 22/12

21:40-06:13

2 stops24h 33m

$1,756

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

Wed 26/11

18:34-19:45

2 stops57h 11m

Sydney Kingsford Smith

Tue 23/12

21:40-06:13

2 stops24h 33m

$1,759

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

Thu 16/10

08:53-19:45

2 stops43h 52m

Sydney Kingsford Smith

Thu 23/10

21:40-00:23

2 stops41h 43m

$1,772

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

Tue 24/2

18:55-19:45

2 stops32h 50m

Sydney Kingsford Smith

Tue 17/3

21:40-17:55

2 stops35h 15m

$1,778

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

Tue 18/11

21:40-16:40

1 stop35h 00m

$1,792

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

Sat 21/2

11:30-12:30

2 stops33h 00m

Sydney Kingsford Smith

Sat 7/3

14:10-22:12

2 stops24h 02m

$1,892

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

13:55-00:24

2 stops25h 29m

$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

11:45-22:12

2 stops26h 27m

$1,933

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

Tue 3/3

12:38-08:45

2 stops28h 07m

Sydney Kingsford Smith

Tue 24/3

11:45-00:24

2 stops27h 39m

$1,935

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. 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 typical price of a round-trip flight between Washington, D.C. Dulles Intl Airport and Sydney?

What is the cheapest month to fly to Sydney?

The month of February is, on average, the cheapest month to fly to Sydney from Washington, D.C. Dulles Intl Airport, with most prices found around $1,383. If you aren’t able to travel to Sydney during the month of February, then flying in April is also cheap. Prices for this month can be found on momondo for an average of $1,393.

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. Dulles Intl Airport 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. Dulles Intl Airport 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. Dulles Intl Airport 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. Dulles Intl Airport for as low as $803 on momondo.

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

You could potentially save up to 14% 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 September 2025, prices for Washington, D.C. Dulles Intl Airport to Sydney flights are approximately 58% 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 return 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?

    There are 15665.3 km between Washington, D.C. Dulles Intl and Sydney Kingsford Smith. Flights usually cover this in 26h 09m, depending on flying conditions and air traffic around both airports.

  • 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 refresh 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 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. Dulles Intl Airport to Sydney Kingsford Smith Airport.

  • What documentation or ID do you need to fly to Sydney Kingsford Smith Airport?

    The necessary travel and health documents for your Sydney Kingsford Smith Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's licence and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

  • 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 $2,200Free cancellationRating
7.4
8,934 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?

Yes. All flights to Sydney from Washington, D.C. on momondo can be compared and filtered by various policies on offer, including flexible booking.

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?

Price alerts on flights to Sydney from Washington, D.C. are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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