IAD - SYD

$649 Find Cheap Flights from Washington Dulles Airport to Sydney

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Dulles Intl to Sydney departing on 9/15. 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, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Sydney

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Washington, D.C. to Sydney.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Washington, D.C. to Sydney.
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Everything you should know

Cheapest round-trip
$1,158
Typical prices: $1,992-$1,196
Multiple Airlines
Fri 8/14Wed 8/19
IAD - SYD • 3 stops
Cheapest one-way
$649
Typical prices: $935-$1,013
Multiple Airlines
Tue 9/15
IAD - SYD • 3 stops
Top airlines
Cheapest • from $1,446 (round-trip)
Best reviews • 8.0 score
Airline reviews
Airline reviews
+1
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Airline reviews
Airline reviews
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Nonstop flights
Not available
There are currently no direct flights between Dulles Intl and Sydney. You'll need at least 1 connection.
Insights
Insights
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Insights
Top layover airports
Cheapest • Avg $300 (round-trip)
Shortest trip • 7h 58m (one-way)
Insights
Insights
Insights
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When to book
in advance
Our data shows that travelers who book at least 2 weeks in advance save around 26% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
Cheapest • 42% price drop
Most popular
Good to know
Good to know
+1
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Good to know
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Flight Deals
Booking Insights
Flight Deals

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

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Dulles Intl to Sydney 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 Dulles Intl to Sydney

Fri, Aug 14 - Wed, Aug 19
Multiple Airlines Logo
9:50 am - 11:50 am
IAD
-
SYD
36h 00m
3 stops
Multiple Airlines Logo
1:15 pm - 4:20 pm
SYD
-
IAD
41h 05m
3 stops
$1,158Multiple Airlines
Tue, Jul 28 - Fri, Jul 31
Multiple Airlines Logo
9:50 am - 11:50 am
IAD
-
SYD
36h 00m
3 stops
Multiple Airlines Logo
1:15 pm - 8:20 am
SYD
-
IAD
33h 05m
3 stops
$1,188Multiple Airlines
Mon, Jul 27 - Fri, Jul 31
Multiple Airlines Logo
9:50 am - 11:50 am
IAD
-
SYD
36h 00m
3 stops
Multiple Airlines Logo
1:15 pm - 8:20 am
SYD
-
IAD
33h 05m
3 stops
$1,231Multiple Airlines
Tue, Aug 4 - Tue, Aug 11
Multiple Airlines Logo
9:50 am - 11:50 am
IAD
-
SYD
36h 00m
3 stops
Multiple Airlines Logo
1:15 pm - 10:16 am
SYD
-
IAD
35h 01m
3 stops
$1,398Multiple Airlines
Sat, Jul 4 - Tue, Jul 21
Multiple Airlines Logo
10:54 am - 7:05 am
IAD
-
SYD
30h 11m
2 stops
Multiple Airlines Logo
9:10 am - 8:20 am
SYD
-
IAD
37h 10m
2 stops
$1,403Multiple Airlines
Sat, Jun 27 - Wed, Jul 1
Multiple Airlines Logo
9:35 am - 11:50 am
IAD
-
SYD
36h 15m
3 stops
Multiple Airlines Logo
6:15 am - 8:25 am
SYD
-
IAD
40h 10m
3 stops
$1,405Multiple Airlines
Fri, Aug 14 - Wed, Aug 19
Multiple Airlines Logo
9:50 am - 9:10 am
IAD
-
SYD
33h 20m
3 stops
Multiple Airlines Logo
9:10 am - 10:16 am
SYD
-
IAD
39h 06m
2 stops
$1,420Multiple Airlines
Tue, Jul 28 - Fri, Jul 31
Multiple Airlines Logo
9:50 am - 7:05 am
IAD
-
SYD
31h 15m
2 stops
Multiple Airlines Logo
9:55 am - 8:20 am
SYD
-
IAD
36h 25m
3 stops
$1,429Multiple Airlines
Sun, Nov 1 - Tue, Nov 10
Turkish Airlines Logo
2:30 pm - 7:35 pm
IAD
-
SYD
37h 05m
2 stops
Turkish Airlines Logo
9:30 pm - 7:25 pm
SYD
-
IAD
37h 55m
2 stops
$1,446Turkish Airlines
Tue, Sep 22 - Tue, Oct 6
Alaska Airlines Logo
7:00 am - 7:30 am
IAD
-
SYD
34h 30m
2 stops
Alaska Airlines Logo
6:50 pm - 5:40 am
SYD
-
IAD
25h 50m
2 stops
$1,463Alaska Airlines
Booking Insights

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

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

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

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Washington, D.C. Dulles Intl Airport to Sydney departing in August.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Washington, D.C. Dulles Intl Airport to Sydney, 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 Washington, D.C. Dulles Intl Airport to Sydney is November, where tickets cost $947 (return) on average. On the other hand, the most expensive months are December and July, where the average cost of round-trip tickets is $2,256 and $1,975 respectively.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Washington, D.C. Dulles Intl Airport to Sydney, 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 Washington, D.C. Dulles Intl Airport to Sydney, you should book around 2 weeks before departure, which saves you about 26% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 26 weeks before departure.

Good to know

Low seasonApril
Cheapest flight$649
Best time to beat the crowds with an average 6% drop in price.
Most popular time to fly with an average 37% increase in price.
Flight from Washington Dulles Airport to Sydney

When to book flights from Dulles Intl to Sydney

Are your dates flexible? Find out the best times to travel from Dulles Intl to Sydney 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 Washington Dulles Airport to Sydney flights

  • Which airlines are suitable for families flying from Washington Dulles Airport to Sydney?

    Families with children traveling from Washington Dulles Airport to Sydney should consider traveling with Qantas Airways. They provide activity packs filled with games, puzzles, coloring books, and other fun items to keep young passengers entertained during the flight. Qantas Airways also offers a dedicated children's inflight entertainment section featuring a variety of movies, TV shows, and music suitable for different age groups.

  • Which airline should I book for an unaccompanied minor flying from Washington Dulles Airport to Sydney?

    United Airlines is a great option for an unaccompanied kid traveling from Washington Dulles Airport to Sydney. According to United Airlines regulation, a child between the ages of 5 and 15 are permitted to fly alone as long as they have parental or guardian consent and can show identification. A passport or a driver's license with a current photo is required from parents or guardians. In addition, parents or guardians must complete the Unaccompanied Minors Form in person at the airport of departure.

  • Which airline from Washington Dulles Airport to Sydney is ideal for persons with special needs?

    If you have special needs and require extra assistance, fly on Qantas Airways from Washington Dulles Airport to Sydney. The airline assists passengers who require mobility aid, including wheelchair assistance, during boarding and disembarkation. They provide accessible seating options and priority boarding for passengers who need extra time or assistance. Passengers with visual impairments can request assistance with Braille safety cards and cabin announcements.

  • Which airlines offer business and first-class flights from Washington Dulles Airport to Sydney?

    Business and first-class flights are available from Washington Dulles Airport to Sydney on United Airlines and Qantas Airways. United Airlines provides pre-departure refreshments, premium entertainment, and bedding from Saks Fifth Avenue. Qantas Airways offers first-class, business-class, and premium economy flights with great service, gourmet meals, and an extensive wine list.

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

    In the last 5 days, the lowest price for a flight from Washington, D.C. Dulles Intl Airport to Sydney was $649 for a one-way ticket and $1,231 for a round-trip.

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

    Yes, you'll most likely have to show a valid passport before boarding the plane in Washington Dulles Airport and on arrival in Sydney.

  • Which airports will I be using when flying from Washington Dulles Airport to Sydney?

    When flying out of Washington Dulles Airport you will be using Washington, D.C. Dulles Intl. You will be landing at Sydney, also known as Sydney Kingsford Smith.

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

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

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

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

  • What is the most popular layover when flying to Sydney from Washington Dulles Airport?

    Dallas is the most popular layover city among KAYAK users traveling from Washington Dulles Airport to Sydney.

  • Which is the best airline for flights from Washington, D.C. to Sydney, Air New Zealand or Delta?

    The two airlines most popular with KAYAK users for flights from Washington, D.C. to Sydney are Air New Zealand and Delta. With an average price for the route of $1,958 and an overall rating of 8.0, Air New Zealand is the most popular choice. Delta is also a great choice for the route, with an average price of $1,050 and an overall rating of 7.9.

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

    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 Washington Dulles Airport to Sydney.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Sydney from Washington Dulles Airport 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 Washington Dulles Airport to Sydney?

    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 Sydney with an airline and back to Washington Dulles Airport with another airline. Booking your flights between Washington Dulles Airport and SYD 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 Washington Dulles Airport to Sydney?

    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 Sydney from Washington Dulles Airport up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from Washington, D.C. Dulles Intl Airport to Sydney

  • Passengers flying from Washington Dulles Airport (IAD) to Sydney will land at Sydney Airport (SYD). Sydney Airport (SYD) is a base for Qantas Airways, which offers competitive prices and flexible travel policies for flights from IAD to SYD.
  • You can get flights from Washington Dulles Airport to Sydney with a layover en route. The layovers differ with your airline, with most stopping at their hubs or base of operation. United Airlines and American Airlines flights have a layover at Los Angeles (LAX) and San Francisco (SFO), respectively, while ANA flights stop in Tokyo (HND).
  • Qantas Airways provides sustainable flights to Sydney from Washington Dulles Airport. Qantas Airways prioritizes sustainability in its operations and invest in eco-friendly aircraft technology. The airline is committed to reducing greenhouse gas emissions, improving fuel efficiency, and investing in sustainable aviation fuels. They prioritize aircraft fleet renewal with more fuel-efficient and lower-emission planes.
  • United Airlines has pet-friendly policies for flights from Washington Dulles Airport to Sydney. Pets are permitted in the cabin or cargo hold in an authorized kennel or carrier. The kennel or carrier should be leak-proof, well-ventilated, and have enough space for the pet. The carrier's maximum size and weight limits are 17 x 12.5 x 7.5 inches and 17 lb, respectively.
  • Public transport options from SYD to downtown Sydney include the train and bus. Train T8 runs every 5 minutes from the airport station to downtown Sydney. Murrays Coaches operates a bus that runs every hour from the Terminal 1 bus stop to downtown Sydney.

Reviews of the top 5 airlines serving from Dulles Intl to Sydney

 
See real verified KAYAK customer reviews for airlines flying from Washington, D.C. to Sydney. 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 Dulles Intl to Sydney? 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.
8.0
Air New ZealandOverall score based on 645 reviews
8.2Boarding
7.9Comfort
8.5Crew
7.4Food
7.4Entertainment
Airline reviews

Great first time experience with ANZ. Such a great customer service. The crew was very friendly and welcoming

10.0 ExcellentManish, May 2026
ZQN - AKL
Read more Air New Zealand reviews

Great first time experience with ANZ. Such a great customer service. The crew was very friendly and welcoming

Great airline service by the staff. I highly recommend it

Needed more leg room. Leg rest and entertainment system box took up a lot of space and I'm not tall. Breakfast was good. Poor quality of the entertainment options.

Boarded on time, smooth flight and "gentle" landing in Palmerston North. Ahead of time due to a tailwind

Time to upgrade those planes so you can provide first class.

My experience with Underpricer was not great. The representative assigned to me did not tell me beforehand that selecting seats, which i could not do through ANZ, WOULD ADD SIGNIFICANT cost to my ticket (all flight segments were reg economy seats. The seat selections for the ticket, MCI-AKL, AKL-PER, PER-MCI, cost $284 USD. I WAS NOT TOLD AHEAD OF SELECTING SEATS chosen by the rep OF THE COSTS and never received an itemized invoice of the seat selections.). The costs of seat selection, an option solicited as a service, with no mention of costs, should have been disclosed to me prior to seat selection and certaily should have been itemized. For all I know, the $284 was not referred from the airline but made up and taken directly by Underpricer. Next, when i checked in, united couldnt find my ticket. This is probably why i didnt get a seat selection on that flight and couldnt check in online, despite Underpricer prompts to do so a week before departure, or at the kiosk at the airport. I had to wait for special help at the counter, then was told that because the flight segment, MCI-IAH, operated by United Airlines via the ANZ. ticket, had changed schedule slightly since I BOOKED MY FLIGHT, the MCI-IAH segment had been decoupled from the rest of the ticket because the IAH layover was now 12.5 hrs AND DID NOT QUALIFY AS A THROUGH FLIGHT TO AKL.. This meant my checked bag could not be checked through to AKL and id have to pick it up at IAH, THEN WAIT MOST OF the long layover WITH the large checked bag until ANZ counter in IAH OPENED for checkING just prior to the flight. Apparently, although underpricer had notified me of schedule changes, they did not update the ANZ TICKET, leading to this problem. Finallly, although I RECHECKED TH BAG IN At IAH 3.5-4 hours before the scheduled departure and the IAH-AKL segment was a direct flight, ANZ LOST MY bag and it took 4 days to find it and get it to me. Not fun.

The flight was smooth and on time. Entertainment options were lacking and there was no food, other than some very boring snacks.

A better selection of entertainment would have been nice. I found nothing that appealed to me as a middle-aged traveler. The flight attendants were gracious, helpful, and attentive. It also would have been nice to have more bathrooms as the flight was full and the plane was big.

The Air New Zealand product is terrible, it's as expensive as a Jetstar ticket with add ons but with surely staff and old aircraft.

Great service. Food could be improved but overall a very good airline

Flight delayed four separate times. I’m now one hour hours late to landing.

worst flight ever from Delta, it got delayed and kept on delaying..

Should never have had to go to Detroit from Orlando back to Tennessee!

Got rerouted from a straight flight from Orlando to Atlanta to Knoxville to a flight from Orlando to Detroit to Knoxville! Seriously!! Flight delay out of Detroit! Long day for what should have been a pretty easy travel day!

Two delays on two separate planes with parts they could not easily find and replace.

Checkin was good, fllight ws good. Onlly complaint is lack of foot on 6 hour flight from Seattle to Boston. Snacks were flimsy - chips and cookies. could have offered something more substantial for such a long flight. I know you can buy food in airport but for the price you pay for a ticket, they should step up for the passengers.

Only beverages were offered to first class and I thought the flight attendant could have also served the Delta Comfort as well instead of sitting down and staring at her phone and walking past all of us to the back of the plane to charge her phone more. There was a complete lack of turbulence and was safe enough for flights attendant to walk around in the front of the plane, collect trash and serve a few people water and turn off the seat belt light. Also didn’t enforce people putting their seats into the upright position and allowed two passengers to remain reclined during landing. They seemed out to lunch completely. Usually my experience on Delta is much better.

Long story short, it was one of the better flight experiences I've had in some time when compared with other airlines.

Flight was great! This flight from Atlanta was even better than when I paid for Comfort from SNA to Atlanta.

Connection flights should be spaced out farther because too close I missed my connection.

Boarding was effortless, the food was outstanding, the seats in Premium Economy were extremely comfortable, and the staff and crew were excellent.

I never flew with alliance. Kayak is a joke and none of the flights or times were correct. Won’t ever use kayak again

I missed my flight due to unforeseen circumstances It was, however , an excellent price !

We had a medical emergency, needing to get to an emergency room upon landing at LAX. I let the back flight attendants know the situation. One, David, contacted the pilot, who made arrangements for EMT's to be there when we got off the plane. They went above and beyond for us. We didn't have to go through customs, as a customs person came to us and checked us right at the exit of the jet way. Another wonderful woman, a United employee at LAX, perhaps a customer service liaison, took care of our luggage situation, as we weren't going to make our connection to Bozeman. When we came back to LAX to see when we could get a flight to Bozeman, the personnel are very accommodating and booked us on the next flight out, and assigned good seats. It was a horrible flight, physically, from Sydney to LAX, , but the professionalism of all involved was excellent! We are very grateful fir the way they all stepped in and helped during a very unpleasant medical situation. Thank you!!

PREMIUM ECONOMY - excellent !Brilliant new plane. Excellent tv catalogue. Good food. Good communication and service from all friend Australian crew. Good communication from captain. Best travel experience in years.

Very good overall. However, your choices of free movies was limited and there was no music Channel???

I couldn't hear all of the announcements. It was nice when they put them on the screen.

I liked boarding the plane. The staff were rude, the food was appalling and the chairs the most uncomfortable I have ever experienced

an hour late, then had to disembark on back stairs and take 4 flights up to get to main airport. No warning, and difficulty for those with canes and poor knees.

Well my expórtenle with Qantas it wasn’t that good KLM from Bs Aires was delay Santiago Chile Qantas QF 028 was still in the airport but the crew didn’t opened the door for me soo I lost my fly And I stuck in the airport 13 hrs waiting for next fly by Latam Arline My question is can I have my money back for business class

Like: departed and arrived on time. Unlike: Food options for purchase allways bad, 1 of 2 of the crew members not very friendly at all. Seats and leg room aweful. At this point I am thinking on switching to AA.

Easy of boarding, helpfully staff at check in, surprisingly comfortable seating

Our flight was canceled same day and we were never informed. Had to pay more and worse seating on another airline.

Did not like that we couldn't complete check in on-line without providing pictures of our passports. Worry about identity theft. We had no delays and boarding was handled In an efficient manner.

My flight time was changed without any notification to me which ruined my time sensitive plans so I ended up completely changing my travel plans and no reimbursement.

Excellent! I got to Munich and was transferred to my Lufthansa flight quickly, in 15 to 20 minutes, so I did not miss my flight. However, I had checked my overhead bag at the boarding gate in Tampa. That got to Tunis the next day. That is to be expected.

WiFi didn’t exist , seats were super cramped, lights stayed on near my seat for a long time while others were dimmed, the food/trash/drink cart hit my shoulder at least a couple of times while moving, food options were down to just one option by the time it got to my row, the utensils were garbage (knife bent at a couple of places by the time I was done eating) the spoon was very flimsy plastic

Vegetarian selection could be better. Bread was too hard to chew.

Crew was friendly and competent. Food, wine, and entertainment were excellent except the raw tuna on the flight to Split. Recommend against serving that - at least as the only option. Many medical conditions do not allow people to eat raw fish.

United didn’t even try to hold the flight for me. They knew I had a tight connection and when I arrived at the gate less than 10 mins after final boarding the flight had already gone. The gate agent wasn’t even notified that I was on my way. She was told I wasn’t at the airport

Flight was overbooked and seats assigned to multiple passengers. Delay 1 hour to sort out.

Good but I don’t received my bags yet is been 5days still no update

It was pretty straight forward, no glitches or hidden costs

It was a short flight so, everything went smoothly and we got to where we needed to be safely.

Loved and was pleasantly surprised by the food!! Request Lufthansa to help transiting passengers at Munich (confusion whether to go thru passport control or not).

Flight home was delayed multiple times, did not get home until 2am

My original booking was through AirCanada and unbeknownst to me they altered flights and providers which caused a complete disaster for checking in for my flights and seat assignments. The original gate agent in Auckland had me basically doing gymnastics to get onto the future flights and have my luggage follow me.

I checked a bag and there was only one agent to assist all customers with any issues.

Super experience. Earlier than schedule departure and arrival. Baggage handling was very good

Plane left an hour late, I missed my connection and my bow case was never even loaded on the plane in VA. I deal with this type of nonsense everytime I fly air canada.

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

Information on your arrival and departure airports