$756 Cheap Flights from Washington (IAD) to Adelaide (ADL)

View $756 flight on Sat, Nov 1, 2025Opens in a new window

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

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Find available prices by choosing your travel dates.

Cheap Flights from Washington to Adelaide (IAD-ADL)

Prices were available within the past 7 days and start at $756 for one-way flights and $1,447 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Sat, Jun 7 - Thu, Jun 12
IAD
Washington
ADL
Adelaide
$1,447 Roundtrip, found 6 days ago
$1,447
Roundtrip
found 6 days ago
Select American Airlines flight, departing Sat, Jun 7 from Washington to Adelaide, returning Thu, Jun 12, priced at $1,447 found 6 days ago
American Airlines
Sat, Jun 7 - Thu, Jun 19
IAD
Washington
ADL
Adelaide
$1,454 Roundtrip, found 6 days ago
$1,454
Roundtrip
found 6 days ago
Select American Airlines flight, departing Sat, Jun 7 from Washington to Adelaide, returning Thu, Jun 19, priced at $1,454 found 6 days ago
Air New Zealand
Wed, Aug 6 - Mon, Aug 18
IAD
Washington
ADL
Adelaide
$1,470 Roundtrip, found 3 days ago
$1,470
Roundtrip
found 3 days ago
Select Air New Zealand flight, departing Wed, Aug 6 from Washington to Adelaide, returning Mon, Aug 18, priced at $1,470 found 3 days ago
Air New Zealand
Tue, Aug 12 - Wed, Aug 27
IAD
Washington
ADL
Adelaide
$1,481 Roundtrip, found 2 days ago
$1,481
Roundtrip
found 2 days ago
Select Air New Zealand flight, departing Tue, Aug 12 from Washington to Adelaide, returning Wed, Aug 27, priced at $1,481 found 2 days ago
Air New Zealand
Sun, Aug 3 - Wed, Aug 20
IAD
Washington
ADL
Adelaide
$1,486 Roundtrip, found 3 days ago
$1,486
Roundtrip
found 3 days ago
Select Air New Zealand flight, departing Sun, Aug 3 from Washington to Adelaide, returning Wed, Aug 20, priced at $1,486 found 3 days ago
American Airlines
Sat, Jun 7 - Thu, Jun 26
IAD
Washington
ADL
Adelaide
$1,514 Roundtrip, found 6 days ago
$1,514
Roundtrip
found 6 days ago
Select American Airlines flight, departing Sat, Jun 7 from Washington to Adelaide, returning Thu, Jun 26, priced at $1,514 found 6 days ago
Fiji Airways
Thu, Jul 3 - Sat, Jul 19
IAD
Washington
ADL
Adelaide
$1,535 Roundtrip, found 6 hours ago
$1,535
Roundtrip
found 6 hours ago
Select Fiji Airways flight, departing Thu, Jul 3 from Washington to Adelaide, returning Sat, Jul 19, priced at $1,535 found 6 hours ago
Air Canada
Tue, Sep 9 - Tue, Sep 16
IAD
Washington
ADL
Adelaide
$1,725 Roundtrip, found 20 hours ago
$1,725
Roundtrip
found 20 hours ago
Select Air Canada flight, departing Tue, Sep 9 from Washington to Adelaide, returning Tue, Sep 16, priced at $1,725 found 20 hours ago
Qantas Airways
Sun, Jun 8 - Sun, Jun 15
IAD
Washington
ADL
Adelaide
$1,734 Roundtrip, found 6 days ago
$1,734
Roundtrip
found 6 days ago
Select Qantas Airways flight, departing Sun, Jun 8 from Washington to Adelaide, returning Sun, Jun 15, priced at $1,734 found 6 days ago
All Nippon Airways
Tue, Sep 9 - Tue, Sep 16
IAD
Washington
ADL
Adelaide
$1,774 Roundtrip, found 20 hours ago
$1,774
Roundtrip
found 20 hours ago
Select All Nippon Airways flight, departing Tue, Sep 9 from Washington to Adelaide, returning Tue, Sep 16, priced at $1,774 found 20 hours ago
Flights from Washington (IAD) to Adelaide (ADL)
Origin airport
Washington Dulles Intl.
Destination airport
Adelaide
Airlines serving
Air Canada, Air New Zealand, All Nippon Airways, American Airlines, Emirates, Etihad Airways, Fiji Airways, JetBlue Airways, Lufthansa, Malaysia Airlines, Qantas Airways, Qatar Airways, Swiss International Air Lines, United
Roundtrip price
$1,446
Distance
10443 mi

Washington to Adelaide Flights

The cheapest times to fly from Washington to Adelaide

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 Washington to Adelaide are during the month of June. You can find some of the cheapest flights from Washington to Adelaide with Expedia's search tool and vast selection of airlines.

The best time to book a flight from Washington to Adelaide

Sunday is one of the best days to book for cheap flights from Washington to Adelaide: 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 Washington to Adelaide

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 Washington to Adelaide in 2025. You can also book with separate airlines for your outbound and return journeys, from $756 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 Washington to Adelaide 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 Washington to Adelaide 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.

Frequently asked questions

How much does a flight from Washington Dulles Intl. Airport (IAD) to Adelaide Airport (ADL) cost?
Discover the latest flight deals from IAD to ADL by entering your preferred travel dates and searching on Expedia. Easily compare prices by departure date if you have flexibility with your schedule and use handy filters to explore prices for your preferred journey. As a member of One Key™, our free loyalty program, you can use Price Tracking to watch fares and receive notifications if prices go up or down.
What is the cheapest month to fly from IAD to ADL?
The cheapest flights from IAD to ADL are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
What is the cheapest airline that flies from IAD to ADL?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that’ll take you from IAD to ADL. Sort your results by “Price (lowest to highest)” to snap up a great deal.
How many flights per day from Washington Dulles Intl. Airport (IAD) to Adelaide Airport (ADL)?
There are no daily nonstop flights departing from Washington Dulles Intl. Airport (IAD) to Adelaide Airport (ADL). But you can book flights with layovers. Filter your search results on Expedia to include one or more stops, and you’ll be on your way in no time at all.
What day of the week has the most flights from IAD to ADL?
You’ll usually find Tuesday the quietest day for flights, while Fridays tend to be the busiest.* However this can change from season to season and during peak travel times or public holidays.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Washington Dulles Intl. Airport (IAD) to Adelaide Airport (ADL)?
To reach Adelaide Airport (ADL) on time, opt for a flight that leaves Washington Dulles Intl. Airport (IAD) before 3 PM. The chance 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 Washington Dulles Intl. Airport (IAD) to Adelaide Airport (ADL) last-minute?
Holding off until just before your departure to book a ticket from IAD to ADL often results in higher prices. Although you may find some last-minute discounts, there’s no guarantee. Be flexible with your travel plans to maximize your chances of landing a bargain.
Is it cheaper to book an IAD to ADL flight and hotel package?
Compared with arranging hotels and flights separately, booking an IAD to ADL flight and hotel package with Expedia could result in significant savings. What’s more, having everything in one place will take the hassle out of travel planning. Simply pick your flights and select from our wide range of stays, then personalize your trip with other add-ons like tours and car rentals.
Can I cancel or change the date of my flight from Washington Dulles Intl. Airport (IAD) to Adelaide Airport (ADL)?
Generally, it’s possible to reschedule or cancel your IAD to ADL 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.

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*Available to One Key members.