What is the cheapest airline that flies from Washington, D.C. to Sydney Kingsford Smith?

United Airlines, Delta, and Alaska Airlines are the most popular carriers operating from Washington, D.C. to Sydney Kingsford Smith

Which layover airport has the shortest connection time from Washington, D.C. to Sydney?

Houston (IAH) has the shortest average layover time for this route: 1h 51m.

How long does it take to fly to Sydney?

Flight times from Washington, D.C. to Sydney vary, but if you’re flying out of Baltimore and flying into Sydney (one of the most popular routes), then the duration is 21h 37m on average. Another popular route from Washington, D.C. to Sydney is flying from Washington, D.C. to Sydney, which will take roughly 23h 47m. Keep in mind that layovers or delays could extend your travel time.

Which layover airport has the shortest travel time from Washington, D.C. to Sydney?

Flights connecting via Nadi (NAN) have the shortest average one-way travel time: 18h 55m.

Which airport is the most popular layover for flights between Washington, D.C. and Sydney?

Dallas (DFW) was the most common stop: 41% of momondo users choosing 1-stop flights on this route connected there.

Which layover airport offers the lowest fares from Washington, D.C. to Sydney?

Flights via Nadi (NAN) offer the lowest average round-trip price of $666.

What airlines fly to Sydney?

United Airlines, Qantas Airways and American Airlines are the top three most popular airlines that fly to Sydney from Washington, D.C. according to our data. United Airlines is the first choice among our users, with 55% of people opting to fly with this airline when traveling to Sydney. Keep in mind that there are 6 different airlines that fly to Sydney on a routine basis, so you have a few additional options to choose from.

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 are updated daily.

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

The number of operators available for flights from Washington, D.C. to Sydney Kingsford Smith Airport is 6 as of June 2026.

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 layovers. 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 required travel and health documents for your Sydney Kingsford Smith Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Sydney Kingsford Smith Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$656 Cheap Flights from Washington, D.C. to Sydney in 2026

Q: What is the typical price of a round-trip flight between Washington, D.C. and Sydney?

Prices are currently low for flights on this route. Typical prices usually range from $1,793 to $1,341. The lowest price recently found on this route was $1,174.

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Washington, D.C. to Sydney

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

11:17 am - 11:50 am

IAD

SYD

34h 33m

3 stops

1:15 pm - 10:16 am

SYD

IAD

35h 01m

3 stops

$1,174Multiple Airlines

Fri, Jul 3 - Tue, Jul 14

9:50 am - 11:50 am

IAD

SYD

36h 00m

3 stops

1:15 pm - 8:20 am

SYD

IAD

33h 05m

3 stops

$1,237Multiple Airlines

Tue, Jul 28 - Fri, Jul 31

10:54 am - 11:50 am

IAD

SYD

34h 56m

3 stops

1:15 pm - 12:47 pm

SYD

IAD

37h 32m

3 stops

$1,274Multiple Airlines

Sat, Jul 4 - Sat, Jul 11

10:54 am - 11:50 am

IAD

SYD

34h 56m

3 stops

1:15 pm - 12:47 pm

SYD

IAD

37h 32m

3 stops

$1,276Multiple Airlines

Sat, Jul 4 - Sat, Jul 11

3:03 pm - 7:00 am

BWI

SYD

25h 57m

2 stops

10:20 am - 5:46 pm

SYD

BWI

21h 26m

1 stop

$1,317United Airlines

Mon, Jun 29 - Wed, Aug 19

6:38 am - 6:55 am

BWI

SYD

34h 17m

1 stop

9:30 am - 6:20 pm

SYD

BWI

22h 50m

1 stop

$1,323United Airlines

Mon, Jun 29 - Tue, Jul 14

1:57 pm - 7:30 am

BWI

SYD

27h 33m

2 stops

12:00 pm - 7:24 pm

SYD

BWI

21h 24m

1 stop

$1,343American Airlines

Sun, Jul 26 - Mon, Aug 3

12:55 pm - 6:55 am

BWI

SYD

28h 00m

2 stops

9:30 am - 6:42 pm

SYD

BWI

23h 12m

2 stops

$1,345Air New Zealand

Wed, Jul 29 - Wed, Aug 26

3:04 pm - 6:50 am

BWI

SYD

25h 46m

2 stops

9:15 am - 9:26 pm

SYD

BWI

26h 11m

2 stops

$1,347Delta

Wed, Jul 1 - Sun, Jul 19

7:23 pm - 7:00 am

BWI

SYD

21h 37m

1 stop

9:30 am - 7:14 am

SYD

BWI

35h 44m

1 stop

$1,353Air New Zealand

Wed, Jul 1 - Wed, Jul 15

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Delta flights from Washington, D.C. to Sydney

Our best Delta deals on Washington, D.C. to Sydney flight tickets

Delta

Jul 1

BWI3:04 pmBaltimore/Washington

25h 46m

2 stops

SYD6:50 amSydney Kingsford Smith

Jul 19

SYD9:15 amSydney Kingsford Smith

26h 11m

2 stops

BWI9:26 pmBaltimore/Washington

$1,347

Delta

Jul 2

BWI12:32 pmBaltimore/Washington

28h 18m

2 stops

SYD6:50 amSydney Kingsford Smith

Aug 19

SYD9:15 amSydney Kingsford Smith

23h 07m

2 stops

BWI6:22 pmBaltimore/Washington

$1,366

Delta

Jun 18

BWI2:10 pmBaltimore/Washington

26h 40m

2 stops

SYD6:50 amSydney Kingsford Smith

Jul 13

SYD9:15 amSydney Kingsford Smith

34h 45m

2 stops

BWI6:00 amBaltimore/Washington

$1,396

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

Our best United Airlines deals on Washington, D.C. to Sydney flight tickets

United Airlines

Jun 29

BWI6:59 pmBaltimore/Washington

21h 56m

1 stop

SYD6:55 amSydney Kingsford Smith

Aug 19

SYD10:20 amSydney Kingsford Smith

21h 26m

1 stop

BWI5:46 pmBaltimore/Washington

$1,317

United Airlines

Jun 15

BWI3:03 pmBaltimore/Washington

25h 57m

2 stops

SYD7:00 amSydney Kingsford Smith

Jun 30

SYD9:30 amSydney Kingsford Smith

22h 50m

1 stop

BWI6:20 pmBaltimore/Washington

$1,323

United Airlines

Jun 15

BWI3:03 pmBaltimore/Washington

25h 57m

2 stops

SYD7:00 amSydney Kingsford Smith

Jul 12

SYD10:20 amSydney Kingsford Smith

21h 37m

1 stop

BWI5:57 pmBaltimore/Washington

$1,341

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

Fri 7/3

11:17 am-11:50 am

3 stops34h 33m

Sydney Kingsford Smith

Tue 7/14

1:15 pm-10:16 am

3 stops35h 01m

$1,174

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

Tue 7/28

9:50 am-11:50 am

3 stops36h 00m

Sydney Kingsford Smith

Fri 7/31

1:15 pm-8:20 am

3 stops33h 05m

$1,237

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

Sat 7/4

10:54 am-11:50 am

3 stops34h 56m

Sydney Kingsford Smith

Sat 7/11

1:15 pm-12:47 pm

3 stops37h 32m

$1,274

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

Sat 7/4

10:54 am-11:50 am

3 stops34h 56m

Sydney Kingsford Smith

Sat 7/11

1:15 pm-12:47 pm

3 stops37h 32m

$1,276

Quickest round-trip

BaltimoreSydney

BWI - SYD

BWISYD

Baltimore/Washington

Mon 6/29

3:03 pm-7:00 am

2 stops25h 57m

Sydney Kingsford Smith

Wed 8/19

10:20 am-5:46 pm

1 stop21h 26m

$1,317

BaltimoreSydney

BWI - SYD

BWISYD

Baltimore/Washington

Mon 6/29

6:38 am-6:55 am

1 stop34h 17m

Sydney Kingsford Smith

Tue 7/14

9:30 am-6:20 pm

1 stop22h 50m

$1,323

BaltimoreSydney

BWI - SYD

BWISYD

Baltimore/Washington

Sun 7/26

1:57 pm-7:30 am

2 stops27h 33m

Sydney Kingsford Smith

Mon 8/3

12:00 pm-7:24 pm

1 stop21h 24m

$1,343

BaltimoreSydney

BWI - SYD

BWISYD

Baltimore/Washington

Wed 7/29

12:55 pm-6:55 am

2 stops28h 00m

Sydney Kingsford Smith

Wed 8/26

9:30 am-6:42 pm

2 stops23h 12m

$1,345

BaltimoreSydney

BWI - SYD

BWISYD

Baltimore/Washington

Wed 7/1

3:04 pm-6:50 am

2 stops25h 46m

Sydney Kingsford Smith

Sun 7/19

9:15 am-9:26 pm

2 stops26h 11m

$1,347

BaltimoreSydney

BWI - SYD

BWISYD

Baltimore/Washington

Wed 7/1

7:23 pm-7:00 am

1 stop21h 37m

Sydney Kingsford Smith

Wed 7/15

9:30 am-7:14 am

1 stop35h 44m

$1,353

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

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

Prices

Airlines

Layovers

Other information

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?

In general, August is the cheapest month to fly from Washington, D.C. to Sydney. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $78. If you are unable to visit Sydney during the month of August, then departing from Washington, D.C. during the month July is also very affordable. Most momondo users find prices during this month for around $137.

How far in advance should I book a flight from Washington, D.C. 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 $1,645 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. for as low as $709 on momondo.

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

You could potentially save up to 19% 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 June 2026, prices for Washington, D.C. to Sydney flights are approximately 112% 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 round-trip 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	21h 37m
Direct flights	None

The fastest flight from Washington, D.C. to Sydney takes 21h 37m

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

Frequently asked questions about flying from Washington, D.C. to Sydney

How far is Washington, D.C. to Sydney Kingsford Smith by plane?
A flight from Washington, D.C. to Sydney Kingsford Smith will travel around 9755.6 mi. 21h 37m is a normal flight duration for this route.
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 are updated daily.
How many operators does momondo search for flights from Washington, D.C. to Sydney Kingsford Smith Airport?
The number of operators available for flights from Washington, D.C. to Sydney Kingsford Smith Airport is 6 as of June 2026.
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 layovers. 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 required travel and health documents for your Sydney Kingsford Smith Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Sydney Kingsford Smith Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.
What is the most popular airline from Washington, D.C. to Sydney?
Based on momondo bookings for flights between Washington, D.C. and Sydney, the leading airline is United Airlines, making up 34% of the total bookings. Other popular airlines include Qantas Airways with 29%, Delta with 12%, and American Airlines with 12%.

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
Delta	PriceFrom $282	Free Cancellation	Rating 7.9 8,394 reviews	Search Delta flights
United Airlines	PriceFrom $377	Free Cancellation	Rating 7.4 9,801 reviews	Search United Airlines flights
Qantas Airways	PriceFrom $787	Free Cancellation	Rating 7.5 1,045 reviews	Search Qantas Airways flights
American Airlines	PriceFrom $836	Free Cancellation	Rating 7.1 11,639 reviews	Search American Airlines flights
Air Canada	PriceFrom $841	Free Cancellation	Rating 7.1 11,151 reviews	Search Air Canada flights
Air New Zealand	PriceFrom $1,261	Free Cancellation	Rating 8.0 645 reviews	Search Air New Zealand flights

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Penrith

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Leura

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Lithgow

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Terrigal

Charlestown

Swansea

Why use momondo?

Why should I use momondo to find a flight deal from Washington, D.C. to Sydney?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Washington, D.C. to Sydney. momondo saves you time and could save you money on your trip.

Can I find flights from Washington, D.C. to Sydney with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Washington, D.C. to Sydney flights to just show those with flexible booking policies.

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

momondo provides multiple filters to help you find the best flight to Sydney from Washington, D.C.. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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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Cheap flights from Washington, D.C. to Sydney from $656

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 8/25. 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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Delta flights from Washington, D.C. to Sydney

Our best Delta deals on Washington, D.C. to Sydney flight tickets

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

Our best United Airlines deals on Washington, D.C. to Sydney flight tickets

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How to get the cheapest flight ticket from Washington, D.C. to Sydney

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?

How far in advance should I book a flight from Washington, D.C. to Sydney?

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

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

What is the cheapest airline that flies from Washington, D.C. to Sydney Kingsford Smith?

What airlines fly to Sydney?

Which airport is the most popular layover for flights between Washington, D.C. and Sydney?

Which layover airport offers the lowest fares from Washington, D.C. to Sydney?

Which layover airport has the shortest travel time from Washington, D.C. to Sydney?

Which layover airport has the shortest connection time from Washington, D.C. to Sydney?

How long does it take to fly to Sydney?

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

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

Direct flights

Frequently asked questions about flying 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

Traveling to a place near Sydney?

Why use momondo?

An easier way to manage your Sydney trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

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