Cheap flights from Washington, D.C. Dulles Intl Airport to Sydney from $663
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 11/9. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
Discover deals from 900+ travel sites with momondo.
Save money when you book flights with momondo
Big names, great deals
Big names, great deals
Search 100s of travel sites to compare prices.Filter for what you want
Filter for what you want
Free Wi-Fi? Stopover? Instantly customise your results.Trusted and free
Trusted and free
We’re completely free to use - no hidden charges or fees.Price Alerts
Price Alerts
Not ready to book? to track prices.Find the cheapest flights from Washington, D.C. Dulles Intl Airport to Sydney
Cheap return flights
Cheap one-way flights
Cheap last-minute flights
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
ANA flights from Washington, D.C. Dulles Intl Airport to Sydney
Our best ANA deals on Washington, D.C. Dulles Intl Airport to Sydney flight tickets
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 April is, on average, the cheapest month to fly to Sydney from Washington, D.C. Dulles Intl Airport, with most prices found around $1,425. If you aren’t able to travel to Sydney during the month of April, then flying in February is also cheap. Prices for this month can be found on momondo for an average of $1,473.
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 $2,119. The most expensive day to fly to Sydney is Thursday, with ticket prices averaging around $2,365.
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 $2,147. 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 $2,977 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 5 weeks ahead of your departure date. In general, you can expect to find flights to Sydney for around $1,982 when searching 5 weeks out. 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 $1,688 on momondo.
Can stopping save me money on Washington, D.C. Dulles Intl Airport to Sydney flights?
You could potentially save up to 35% 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 June 2025, prices for Washington, D.C. Dulles Intl Airport to Sydney flights are approximately 51% cheaper when compared to flights at the same time last year.
When to book flights from Washington, D.C. Dulles Intl Airport to Sydney
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
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 21h 57m, 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?
As of June 2025, there are 2 operators available to choose from 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?
momondo data reveals that the most frequently booked airline on the route from Washington, D.C. Dulles Intl Airport to Sydney is United Airlines, representing 59% of all bookings. The subsequent popular airline is Air Canada at 41%.
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 | ||
|---|---|---|---|---|---|
| PriceFrom $1,842 | Free cancellation | Rating 7.1 9,573 reviews | |||
| PriceFrom $2,206 | Free cancellation | Rating 7.4 8,810 reviews |
Travelling to a place near Sydney?
Book flights to Sydney if you plan to visit one of these locationsWhy 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.