Cheap flights from Washington, D.C. to Sydney from $431
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 7/31. 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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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?
In general, February 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 $912. If you are unable to visit Sydney during the month of February, then departing from Washington, D.C. during the month April is also very affordable. Most momondo users find prices during this month for around $928.
What is the cheapest day to depart on your flight to Sydney?
The cheapest day to depart from Washington, D.C. to Sydney is on a Tuesday when prices can be found for as low as $1,353. The most expensive day to fly to Sydney is Friday, with ticket prices averaging around $1,485.
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 at noon. momondo users have found flights departing from Washington, D.C. to Sydney at noon for as low as $1,219. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights to Sydney are more costly in the evening, with an average ticket price of $1,464. Departure times in the evening fall within the peak daily travel times, which is why tickets can be more expensive.
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 9 weeks ahead of your departure date. In general, you can expect to find flights to Sydney for around $1,582 when searching 9 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 $933 on momondo.
Can stopping save me money on Washington, D.C. to Sydney flights?
You could potentially save up to 28% 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 2025, prices for Washington, D.C. to Sydney flights are approximately 60% cheaper when compared to flights at the same time last year.
What is the cheapest airline that flies from Washington, D.C. to Sydney Kingsford Smith?
Delta, Fiji Airways, and Qantas Airways are the most popular carriers operating from Washington, D.C. to Sydney Kingsford Smith
What airlines fly to Sydney?
United Airlines, American Airlines and Qantas Airways 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 37% of people opting to fly with this airline when traveling to Sydney. Keep in mind that there are 7 different airlines that fly to Sydney on a routine basis, so you have a few additional options to choose from.
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
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 24m 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 7 as of June 2025.
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 American Airlines, making up 41% of the total bookings. Other popular airlines include United Airlines with 22%, Qantas Airways with 16%, and Delta with 11%.
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 | ||
|---|---|---|---|---|---|
| PriceFrom $346 | Free Cancellation | Rating 7.4 8,790 reviews | |||
| PriceFrom $543 | Free Cancellation | Rating 8.0 7,950 reviews | |||
| PriceFrom $600 | Free Cancellation | Rating 7.2 10,000 reviews | |||
| PriceFrom $815 | Free Cancellation | Rating 7.5 854 reviews | |||
| PriceFrom $1,015 | Free Cancellation | Rating 7.1 9,531 reviews | |||
| PriceFrom $1,294 | Free Cancellation | Rating 8.0 483 reviews | |||
| PriceFrom $1,370 | Free Cancellation | Rating 8.3 882 reviews |
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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.