SYD - IAD

$502 Find Cheap Flights from Sydney to Washington Dulles Airport

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Sydney to Dulles Intl departing on 10/15. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy

KAYAK searches hundreds of travel sites at once for deals on flights to Washington, D.C. Dulles Intl Airport

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Sydney to Washington, D.C., as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Sydney to Washington, D.C., as well as popular online travel agencies
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Flight Deals

Cheap Flights from Sydney to Dulles Intl (SYD-IAD)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Sydney to Dulles Intl that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Sydney to Dulles Intl

Wed, Feb 18 - Sun, Feb 22
Air Canada Logo
11:20 am - 9:05 pmSYD-IAD
25h 45m2 stops
Air Canada Logo
9:00 am - 9:35 amIAD-SYD
32h 35m2 stops
$949Air Canada
Find Deal
Wed, Nov 5 - Tue, Nov 11
Air Canada Logo
11:20 am - 8:26 pmSYD-IAD
25h 06m2 stops
Air Canada Logo
9:00 am - 9:35 amIAD-SYD
32h 35m2 stops
$985Air Canada
Find Deal
Fri, Oct 31 - Fri, Nov 7
Multiple Airlines Logo
2:15 pm - 6:48 amSYD-IAD
31h 33m2 stops
Multiple Airlines Logo
6:48 am - 12:30 pmIAD-SYD
37h 42m2 stops
$987Multiple Airlines
Find Deal
Wed, Oct 29 - Wed, Nov 5
Multiple Airlines Logo
2:15 pm - 12:15 amSYD-IAD
25h 00m2 stops
Multiple Airlines Logo
12:35 pm - 12:30 pmIAD-SYD
31h 55m2 stops
$1,027Multiple Airlines
Find Deal
Wed, Oct 29 - Wed, Nov 5
United Airlines Logo
12:10 pm - 7:26 pmSYD-IAD
22h 16m1 stop
United Airlines Logo
3:25 pm - 9:15 amIAD-SYD
25h 50m1 stop
$1,068United Airlines
Find Deal
Wed, Feb 18 - Sun, Feb 22
United Airlines Logo
12:10 pm - 4:29 pmSYD-IAD
20h 19m1 stop
United Airlines Logo
10:10 pm - 9:05 amIAD-SYD
42h 55m1 stop
$1,070United Airlines
Find Deal
Thu, Oct 23 - Tue, Nov 4
Alaska Airlines Logo
9:40 pm - 4:42 pmSYD-IAD
34h 02m1 stop
Alaska Airlines Logo
6:13 pm - 7:45 pmIAD-SYD
33h 32m2 stops
$1,071Alaska Airlines
Find Deal
Thu, Oct 30 - Thu, Nov 6
American Airlines Logo
11:20 am - 10:51 pmSYD-IAD
26h 31m2 stops
American Airlines Logo
1:58 pm - 9:00 amIAD-SYD
27h 02m2 stops
$1,113American Airlines
Find Deal
Thu, Oct 16 - Thu, Oct 23
Alaska Airlines Logo
9:40 pm - 4:42 pmSYD-IAD
34h 02m2 stops
Alaska Airlines Logo
7:41 pm - 7:45 pmIAD-SYD
33h 04m2 stops
$1,121Alaska Airlines
Find Deal
Thu, Oct 30 - Thu, Nov 6
American Airlines Logo
1:05 pm - 10:51 pmSYD-IAD
24h 46m1 stop
American Airlines Logo
6:04 am - 6:55 amIAD-SYD
32h 51m1 stop
$1,123American Airlines
Find Deal

Everything you should know

Top airlines
Air Canada
Cheapest • from $949 (round-trip)
United Airlines
Best reviews • 7.4 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to book
3 weeks
in advance
Our data shows that travelers who book at least 3 weeks in advance save around 26% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
March
Cheapest • 22% price drop
December
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Cheapest round-trip
$949
Typical prices: $1,003-1232
Air Canada
Wed 2/18Sun 2/22
SYD - IAD • 2 stops
Cheapest one-way
$502
Typical prices: $814-1111
Multiple Airlines
Wed 10/15
SYD - IAD • 3 stops
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Dulles Intl!
Booking Insights

KAYAK's insights & trends for Sydney to Dulles Intl flights

Get data-powered insights and trends into flights from Sydney to Dulles Intl to help you find the cheapest flights, the best time to fly and much more.

How much is a round-trip flight from Sydney to Washington, D.C. Dulles Intl Airport?

What’s the cheapest day of the week to fly from Sydney to Washington Dulles Airport?

The average price of all round-trip flights from Sydney to Washington, D.C. Dulles Intl Airport clicked on KAYAK for each day over the last 12 months.

Your flight ticket price will generally be cheaper if you fly to Washington Dulles Airport on a Tuesday and more expensive on a Friday. On your return trip to Sydney, you should consider flying back on a Tuesday, and avoid Mondays for better deals.

What is the cheapest month to fly from Sydney to Washington, D.C. Dulles Intl Airport?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Sydney to Washington, D.C. Dulles Intl Airport, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Sydney to Washington, D.C. Dulles Intl Airport is March, where tickets cost $1,014 (return) on average. On the other hand, the most expensive months are December and January, where the average cost of round-trip tickets is $1,608 and $1,439 respectively.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Sydney to Washington, D.C. Dulles Intl Airport, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Sydney to Washington, D.C. Dulles Intl Airport, you should book around 3 weeks before departure, which saves you about 26% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 22 weeks before departure.

Good to know

Low seasonJanuary
Cheapest flight$502
Best time to beat the crowds but there is an average 10% increase in price.
Most popular time to fly with an average 23% increase in price.
Flight from Sydney to Washington Dulles Airport

When to book flights from Sydney to Dulles Intl

Are your dates flexible? Find out the best times to travel from Sydney to Dulles Intl based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking Sydney to Washington Dulles Airport flights

  • What is the cheapest flight from Sydney to Washington, D.C. Dulles Intl Airport?

    In the last 3 days, the lowest price for a flight from Sydney to Washington, D.C. Dulles Intl Airport was $502 for a one-way ticket and $949 for a round-trip.

  • Do I need a passport to fly between Sydney and Washington Dulles Airport?

    Yes, you’ll need a passport to travel to Washington Dulles Airport from Sydney.

  • Which aircraft models fly most regularly from Sydney to Washington Dulles Airport?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Sydney to Washington Dulles Airport?

    Star Alliance, oneworld, and SkyTeam are the airline alliances operating flights between Sydney and Washington Dulles Airport, with Star Alliance being the most commonly used for this route.

  • How does KAYAK find such low prices on flights from Sydney to Washington Dulles Airport?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Sydney to Washington Dulles Airport.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Sydney to Washington Dulles Airport?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Washington Dulles Airport from Sydney is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Sydney to Washington Dulles Airport?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Washington Dulles Airport with an airline and back to Sydney with another airline. Booking your flights between Sydney and IAD can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Sydney to Washington Dulles Airport?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Washington Dulles Airport from Sydney up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airline flying from Sydney to Dulles Intl

 
See real verified KAYAK customer reviews for airlines flying from Sydney to Washington, D.C.. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Sydney to Dulles Intl? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.4
United AirlinesOverall score based on 8929 reviews
6.6Food
7.3Comfort
7.1Entertainment
7.7Boarding
8.1Crew
Airline reviews

IAD with the archaic people movers is just a place to be avoided.

10.0 ExcellentThomas, Aug 2025CMH - IAD
Read more United Airlines reviews

IAD with the archaic people movers is just a place to be avoided.

Overall, it was good. I was seating next to a wonderful lady and did not notice how time flew. Thanks

This is the best united airlines flight that I took. The crew was very friendly and the food was tasty!

It is clear that someone knew, and competent, is in charge of food at United Airlines at least for the international flights. I was flying in coach, but the choices of the dinner were excellent. Tasty, and appropriate size. I had the beef, which was a little bit like a shepherds pie, and it was good. Nothing comparable has been served on a United flight in years. It will not be confused with three star food, but it is very good for airline food. Even better was the breakfast choice between a cinnamon roll and a breakfast sandwich. I chose the breakfast sandwich which was absolutely delicious and which I would happily order again at my local Starbucks or Panera. It is clear that someone knew indifferent is in charge of the food and it’s about time.

Had one staff that was not pleasant. Seems they are stressed with too many people to care for.

I would have liked an opportunity to move to a different seat ( even would have checked in my hand luggage)as I had health issues where I didn't have to clamber over the passenger next to me to for toilet use/ movement [ She was a highly unpleasant neighbor to sit next to]. In addition, I found that my European phone plan had run out of data and so I was not receiving emails from yourselves on airport wifi to be able to check in online and verifications difficult as did not accept the ticket number I had. I asked for an extra blanket but was told there was none. Then I saw other passengers receiving them. I couldn't eat the food and asked for snacks : Stewardess said " on the way" but they did not bring. The best bit was the check in process in Lisbon. Very efficient. However, I did not understand why we had to collect our bags at Washington then go through customs again. It was not explained. I also with my leg and health issue had approximately mile walk to the gate ( which then changed) . There appeared to be no moving walkways or help provided.

The attendant were friendly. I suggest you have a medical attendant on board every flight so that in case someone is sick , he/she will help them.

We had a very long diversion and our food voucher didn’t work because the restaurants were closed

United airlines, mediocre at best. No issues , nothing great . Worked for me

Turbulent taking off & landing to Dulles from Raleigh. Flight from Dulles to Tokyo very good!!

Everything you need to know for your flight from Sydney to Dulles Intl

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