$856 Cheap Flights from Adelaide (ADL) to Washington (IAD)

View $856 flight on Wed, Oct 15, 2025Opens in a new window

Popular airlines from Adelaide, SA Airport (ADL) to Washington Dulles Intl. Airport (IAD)

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Cheap Flights from Adelaide to Washington (ADL-IAD)

Prices were available within the past 7 days and start at $856 for one-way flights and $1,735 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Thu, Dec 25 - Thu, Jan 8
ADL
Adelaide
IAD
Washington
$1,735 Roundtrip, found 3 days ago
$1,735
Roundtrip
found 3 days ago
Select United flight, departing Thu, Dec 25 from Adelaide to Washington, returning Thu, Jan 8, priced at $1,735 found 3 days ago
Qantas Airways
Thu, Dec 25 - Thu, Jan 8
ADL
Adelaide
IAD
Washington
$1,753 Roundtrip, found 3 days ago
$1,753
Roundtrip
found 3 days ago
Select Qantas Airways flight, departing Thu, Dec 25 from Adelaide to Washington, returning Thu, Jan 8, priced at $1,753 found 3 days ago
Air Canada
Mon, Nov 24 - Mon, Dec 1
ADL
Adelaide
IAD
Washington
$1,817 Roundtrip, found 5 hours ago
$1,817
Roundtrip
found 5 hours ago
Select Air Canada flight, departing Mon, Nov 24 from Adelaide to Washington, returning Mon, Dec 1, priced at $1,817 found 5 hours ago
United
Thu, Dec 25 - Thu, Jan 8
ADL
Adelaide
IAD
Washington
$1,834 Roundtrip, found 3 days ago
$1,834
Roundtrip
found 3 days ago
Select United flight, departing Thu, Dec 25 from Adelaide to Washington, returning Thu, Jan 8, priced at $1,834 found 3 days ago
Jetstar
Thu, Oct 23 - Thu, Nov 6
ADL
Adelaide
IAD
Washington
$1,852 Roundtrip, found 4 days ago
$1,852
Roundtrip
found 4 days ago
Select Jetstar flight, departing Thu, Oct 23 from Adelaide to Washington, returning Thu, Nov 6, priced at $1,852 found 4 days ago
Jetstar
Thu, Oct 23 - Thu, Nov 6
ADL
Adelaide
IAD
Washington
$1,859 Roundtrip, found 4 days ago
$1,859
Roundtrip
found 4 days ago
Select Jetstar flight, departing Thu, Oct 23 from Adelaide to Washington, returning Thu, Nov 6, priced at $1,859 found 4 days ago
Jetstar
Thu, Oct 23 - Thu, Nov 6
ADL
Adelaide
IAD
Washington
$1,871 Roundtrip, found 4 days ago
$1,871
Roundtrip
found 4 days ago
Select Jetstar flight, departing Thu, Oct 23 from Adelaide to Washington, returning Thu, Nov 6, priced at $1,871 found 4 days ago
Qantas Airways
Thu, Oct 23 - Thu, Nov 6
ADL
Adelaide
IAD
Washington
$1,924 Roundtrip, found 4 days ago
$1,924
Roundtrip
found 4 days ago
Select Qantas Airways flight, departing Thu, Oct 23 from Adelaide to Washington, returning Thu, Nov 6, priced at $1,924 found 4 days ago
Qantas Airways
Thu, Oct 23 - Thu, Nov 6
ADL
Adelaide
IAD
Washington
$1,930 Roundtrip, found 4 days ago
$1,930
Roundtrip
found 4 days ago
Select Qantas Airways flight, departing Thu, Oct 23 from Adelaide to Washington, returning Thu, Nov 6, priced at $1,930 found 4 days ago
Virgin Australia
Thu, Oct 23 - Thu, Nov 6
ADL
Adelaide
IAD
Washington
$2,044 Roundtrip, found 4 days ago
$2,044
Roundtrip
found 4 days ago
Select Virgin Australia flight, departing Thu, Oct 23 from Adelaide to Washington, returning Thu, Nov 6, priced at $2,044 found 4 days ago

Frequently asked questions

How much does a flight from Adelaide Airport (ADL) to Washington Dulles Intl. Airport (IAD) cost?
Get a cheap one-way flight from $856 or cheap return flight from $1,735 from Adelaide Airport (ADL) to Washington Dulles Intl. Airport (IAD) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight offers on this route.
What is the cheapest month to fly from Adelaide Airport (ADL) to Washington Dulles Intl. Airport (IAD)?
The cheapest month to fly from ADL to IAD is December, when demand is low. Off-peak season is generally when better flight deals are available between these airports.
What is the cheapest airline that flies from Adelaide Airport (ADL) to Washington Dulles Intl. Airport (IAD)?
Use the filters on Expedia to compare different airlines and find the most affordable carrier that'll fly you from ADL to IAD. Then, sort your results by "Price (lowest to highest)" to score a good deal.
How many flights per day from Adelaide Airport (ADL) to Washington Dulles Intl. Airport (IAD)?
Nonstop flights from Adelaide Airport (ADL) to Washington Dulles Intl. Airport (IAD) aren't available daily, so you'll need to take a flight with a layover. Explore your options with our filter tool. Enter your travel dates and select either "1 Stop" or "2+ Stops."
What day of the week has the most flights from ADL to IAD?
Generally you'll find the largest variety of flight choices on a Friday. Tuesdays tend to be the quietest.* But this can vary depending on the time of year, carrier and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Adelaide Airport (ADL) to Washington Dulles Intl. Airport (IAD)?
To reach Washington Dulles Intl. Airport (IAD) without delays, choose a flight that takes off from Adelaide Airport (ADL) before 3 PM. The likelihood of cancellations is 22% higher, on average, for departures after this hour.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Adelaide Airport (ADL) to Washington Dulles Intl. Airport (IAD) last-minute?
Last-minute fares from ADL to IAD are typically more expensive. To secure the lowest prices, start looking for flights well ahead of time. That being said, if your travel plans are flexible, you may score a cheap ticket right before you leave.
Is it cheaper to book an ADL to IAD flight and hotel package?
Securing an ADL to IAD flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the convenience of organizing your trip all in one place. Select from our extensive range of stays and then add activities, flights and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Adelaide Airport (ADL) to Washington Dulles Intl. Airport (IAD)?
Typically, it's possible to reschedule or cancel your ADL to IAD flight. However, for bookings made more than 24 hours ago, additional fees may apply. Refer to your airline's policies in your itinerary to see what changes are allowed and whether any costs are involved. You'll also find more details on our Customer Service portal.

Travel information

Origin airport
Adelaide
Destination airport
Washington Dulles Intl.
Airlines serving
Air Canada, Air New Zealand, All Nippon Airways, Emirates, JetBlue Airways, Qatar Airways
Roundtrip price
$1,735
Distance
10443 mi

Book with confidence

Adelaide to Washington Flights

The cheapest times to fly from Adelaide to Washington

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Adelaide to Washington are during the month of December. You can find some of the cheapest flights from Adelaide to Washington with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Adelaide to Washington

Sunday is one of the best days to book for cheap flights from Adelaide to Washington: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Adelaide to Washington

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Adelaide to Washington in 2025. You can also book with separate airlines for your outbound and return journeys, from $856 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Adelaide to Washington flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Adelaide to Washington airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Adelaide to Washington Flights

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*Available to One Key members.