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$508+ Cheap flights from Dulles Intl (IAD) to Sydney (SYD)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 6/19. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — SYD
Apr 27 — May 41
Sun 4/27
Sun 5/4
1 adult, Economy
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Cheapflights Tip: The best prices from Washington, D.C. Dulles Intl to Sydney Kingsford Smith are usually found in February or April, booked 80 days in advance, depart on a Tuesday or Thursday and return on a Tuesday

Cheap flight deals from Dulles Intl to Sydney

Discover tips and strategies to find the most affordable flight options for your journey from Dulles Intl (IAD) to Sydney (SYD). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated April 22, 2025.

Most accurate provider

AranGrant
3 stars

Most trusted provider

AranGrant
3 stars

Round-trip from

$1,205
(StudentUniverse)

One-way from

$508
(Trip.com)

Popular in

December

Cheapest in

February

Average price

$927
Provider with most accurate pricing for Washington, D.C. Dulles Intl-Sydney Kingsford Smith flight deals.
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Provider most trusted by Cheapflights users for Washington, D.C. Dulles Intl-Sydney Kingsford Smith flights.
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From Washington, D.C. Dulles Intl to Sydney Kingsford Smith
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One-way flight from Washington, D.C. Dulles Intl to Sydney Kingsford Smith
Search Deals
Highest demand for flights based on searches. 18% potential increase in price ($306 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($40 potential savings vs. average RT price).
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Average for round-trip flights in April 2025
Search Deals

Find flight deals from Dulles Intl to Sydney

Cheapest flights from Dulles Intl to Sydney
Explore the most affordable flight options available from Dulles Intl to Sydney. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 22, 2025.

This Gurufare deal was found by Cheapflights users on 4/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/305:16 pmIAD - SYD
2 stops26h 29mQantas Airways
Wed 12/107:30 amSYD - IAD
2 stops24h 36mQantas Airways
Deal found 4/22$1,131
This StudentUniverse deal was found by Cheapflights users on 4/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure StudentUniverse is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/125:55 pmIAD - SYD
2 stops26h 40mAir New Zealand
Tue 8/2611:50 amSYD - IAD
2 stops26h 40mAir New Zealand
Deal found 4/21$1,205
This KAYAK deal was found by Cheapflights users on 4/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/1912:15 pmIAD - SYD
1 stop41h 00mANA
Tue 11/189:45 pmSYD - IAD
1 stop33h 55mANA
Deal found 4/21$1,282
This Fiji Airways deal was found by Cheapflights users on 4/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Fiji Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/215:31 pmIAD - SYD
2 stops28h 14mMultiple Airlines
Thu 11/136:00 amSYD - IAD
2 stops32h 18mMultiple Airlines
Deal found 4/22$1,296
This Alaska Airlines deal was found by Cheapflights users on 4/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/276:15 pmIAD - SYD
2 stops35h 30mAlaska Airlines
Tue 6/39:40 pmSYD - IAD
2 stops32h 34mAlaska Airlines
Deal found 4/21$1,415
This Air Canada deal was found by Cheapflights users on 4/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/219:45 amIAD - SYD
3 stops31h 35mAir Canada
Tue 11/1811:20 amSYD - IAD
2 stops39h 56mAir Canada
Deal found 4/21$1,420
This oojo deal was found by Cheapflights users on 4/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/291:30 pmIAD - SYD
2 stops39h 30mTurkish Airlines
Tue 5/138:55 pmSYD - IAD
2 stops52h 50mTurkish Airlines
Deal found 4/21$1,433
This American Airlines deal was found by Cheapflights users on 4/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/16:27 amIAD - SYD
1 stop34h 28mAmerican Airlines
Tue 7/159:30 pmSYD - IAD
2 stops27h 29mAmerican Airlines
Deal found 4/21$1,538
This Travelocity deal was found by Cheapflights users on 4/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/227:15 amIAD - SYD
2 stops39h 00mFiji Airways
Thu 5/291:15 pmSYD - IAD
2 stops30h 40mFiji Airways
Deal found 4/22$1,545
This United Airlines deal was found by Cheapflights users on 4/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/138:30 amIAD - SYD
1 stop32h 30mUnited Airlines
Wed 8/139:30 amSYD - IAD
1 stop29h 30mUnited Airlines
Deal found 4/22$1,557
This Delta deal was found by Cheapflights users on 4/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/83:00 pmIAD - SYD
2 stops25h 35mDelta
Wed 1/711:05 amSYD - IAD
2 stops28h 45mDelta
Deal found 4/22$1,571

Cheapflights Fare Finder

Customize your flight search to find flights from Dulles Intl to Sydney that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated April 22, 2025.
Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to Sydney that are best for you.

Fly from

Dulles Intl

Fly to

Sydney

Route

Depart

Return

Price

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

Fri 7/4

3:00 pm-8:45 am

2 stops27h 45m

Sydney Kingsford Smith

Mon 7/21

8:45 am-1:00 am

2 stops30h 15m

$1,251

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

Tue 6/3

5:07 pm-11:45 am

2 stops28h 38m

Sydney Kingsford Smith

Tue 6/10

6:15 am-10:39 pm

2 stops30h 24m

$1,296

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

Tue 5/27

6:15 pm-7:45 pm

2 stops35h 30m

Sydney Kingsford Smith

Tue 6/3

9:40 pm-4:14 pm

2 stops32h 34m

$1,415

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

Tue 4/29

1:30 pm-7:00 pm

2 stops39h 30m

Sydney Kingsford Smith

Tue 5/13

8:55 pm-11:45 am

2 stops52h 50m

$1,433

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

Thu 7/3

6:43 pm-6:55 am

1 stop22h 12m

Sydney Kingsford Smith

Wed 8/6

10:25 am-4:26 pm

1 stop20h 01m

$1,499

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

Tue 7/1

6:27 am-6:55 am

1 stop34h 28m

Sydney Kingsford Smith

Tue 7/15

9:30 pm-10:59 am

2 stops27h 29m

$1,538

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

Thu 5/22

7:15 am-12:15 pm

2 stops39h 00m

Sydney Kingsford Smith

Thu 5/29

1:15 pm-5:55 am

2 stops30h 40m

$1,545

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

Sun 7/13

8:30 am-7:00 am

1 stop32h 30m

Sydney Kingsford Smith

Wed 8/13

9:30 am-1:00 am

1 stop29h 30m

$1,557

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

Wed 7/9

3:00 pm-6:35 am

2 stops25h 35m

Sydney Kingsford Smith

Wed 8/20

9:25 am-5:58 pm

2 stops22h 33m

$1,571

Washington, D.C.Sydney

IAD - SYD

IADSYD

Washington, D.C. Dulles Intl

Sun 5/4

12:15 pm-9:25 am

1 stop31h 10m

Sydney Kingsford Smith

Sun 5/18

11:50 am-10:05 am

1 stop36h 15m

$1,616

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/21

Showing 1-10 of 22 results
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Compare providers for flights from Dulles Intl to Sydney

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Dulles Intl to Sydney in April.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*2 stars
OvagoPrice Accuracy3 starsTrust Score*2 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Washington, D.C. Dulles Intl Airport-Sydney flights, users find the pricing of AranGrant to be most consistent on Cheapflights vs. AranGrant Users can find the same prices on Washington, D.C. Dulles Intl Airport-Sydney flight deals on Cheapflights vs. AranGrant >95% of the time. Price accuracy is based on data collected from Washington, D.C. Dulles Intl Airport-Sydney flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Washington, D.C. Dulles Intl Airport-Sydney flights, Cheapflights users trust AranGrant the most. AranGrant has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Washington, D.C. Dulles Intl Airport-Sydney flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Dulles Intl to Sydney

Have a flexible travel schedule? Discover the best time to fly to Sydney from Dulles Intl with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Washington, D.C. Dulles Intl Airport to Sydney

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

Use this chart to determine the optimal time to book a round-trip flight from Dulles Intl to Sydney. Price data was last updated on April 18, 2025.

To ensure you get the cheapest price possible for a flight from Washington, D.C. Dulles Intl Airport to Sydney, you should look to book at least 80 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

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

Currently, February is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Sydney (average of $1,046). Flying from Washington, D.C. Dulles Intl Airport to Sydney in December is currently the most expensive (average of $1,643). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from IAD to SYD?

Find hourly flight availability from Dulles Intl to Sydney. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated April 22, 2025.

When flying from Washington, D.C. Dulles Intl Airport to Sydney, the time of day you fly usually plays a role in the price. Save by searching for a flight in the afternoon, which can drop the price by up to 17% versus a flight in the morning.

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

Use this chart to determine the cheapest time to fly round-trip from Dulles Intl to Sydney. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Washington, D.C. Dulles Intl Airport to Sydney flight should consider departing on Thursday mornings when fares are most often at their lowest. Saturday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

Rainfall in Sydney by month

Plan your trip to Sydney by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Sydney ranges from 2.0 - 5.1 inches per month. March is typically the wettest month, when rainfall can reach 5.1 in. September is typically the driest time to visit Sydney when rainfall is around 2.0 in.

Temperature in Sydney by month

Plan your trip to Sydney by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Sydney, use this chart to help with planning. For those seeking warmer temperatures, January is the ideal time of year to visit, when temperatures reach an average of 71.6 F. Travelers looking to avoid the cold should look outside of July, when temperatures are typically at their lowest (around 51.8 F).

Reviews of airlines servicing Sydney

Get insights into the airlines that provide service to Sydney. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Sydney. Reviews last updated April 22, 2025.
To help decide which airline to fly from Washington, D.C. to Sydney, see what other customers have to say about Air Tahiti Nui, ANA and Fiji Airways. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Air Tahiti Nui
8.8
Very good
62 reviews

Food

7.8

Boarding

8.7

Comfort

8.1

Crew

9.1

Entertainment

7.3

Overall

8.8

Reviews

1 / 2
10.0
Excellent

Isabelle,Apr 2023

AKL - PPT

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.
Air Tahiti Nui
8.8
Very good
62 reviews
Air Tahiti Nui
8.8
Very good
62 reviews

Food

7.8

Boarding

8.7

Comfort

8.1

Crew

9.1

Entertainment

7.3

Overall

8.8

Reviews

1 / 2
10.0
Excellent

Isabelle,Apr 2023

AKL - PPT

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.
ANA
8.3
Very good
847 reviews
Air Tahiti Nui
8.8
Very good
62 reviews

Food

7.8

Boarding

8.7

Comfort

8.1

Crew

9.1

Entertainment

7.3

Overall

8.8

Reviews

1 / 2
10.0
Excellent

Isabelle,Apr 2023

AKL - PPT

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.
Fiji Airways
8.1
Very good
188 reviews
Air Tahiti Nui
8.8
Very good
62 reviews

Food

7.8

Boarding

8.7

Comfort

8.1

Crew

9.1

Entertainment

7.3

Overall

8.8

Reviews

1 / 2
10.0
Excellent

Isabelle,Apr 2023

AKL - PPT

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.
Delta
8.0
Very good
7,920 reviews
Air Tahiti Nui
8.8
Very good
62 reviews

Food

7.8

Boarding

8.7

Comfort

8.1

Crew

9.1

Entertainment

7.3

Overall

8.8

Reviews

1 / 2
10.0
Excellent

Isabelle,Apr 2023

AKL - PPT

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.
Air New Zealand
8.0
Very good
469 reviews
Air Tahiti Nui
8.8
Very good
62 reviews

Food

7.8

Boarding

8.7

Comfort

8.1

Crew

9.1

Entertainment

7.3

Overall

8.8

Reviews

1 / 2
10.0
Excellent

Isabelle,Apr 2023

AKL - PPT

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.

Related info for your journey

Find useful and relevant information for your journey from Dulles Intl to Sydney. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Sydney from Washington, D.C. Dulles Intl?

    Sydney Kingsford Smith (SYD) is the airport you will fly into if you book a flight from Washington, D.C. Dulles Intl to Sydney. You should not have trouble finding flights to Kingsford Smith from Washington, D.C. Dulles Intl; the airport handles an average of 0 inbound flights from Washington, D.C. Dulles Intl per day. You should also have plenty of airline options to choose from since 7 airlines have flights to the Sydney airport from Washington, D.C. Dulles Intl. It is only a 4.6 mi journey from Kingsford Smith (SYD) to Sydney’s city center.

  • What are the cheapest airlines flying from Washington, D.C. Dulles Intl Airport to Sydney round-trip?

    Our cheapest airline available from Washington, D.C. Dulles Intl Airport to Sydney is Air New Zealand. Our recent data shows that you can find tickets from as low as $1,205 on this airline. Additional options worth looking into are ANA and Alaska Airlines, starting at $1,282 and $1,415 round-trip. Users have found that Air New Zealand is 7% cheaper than the other options available to this destination.

  • What are the cheapest airlines to fly from Washington, D.C. Dulles Intl Airport to Sydney one-way?

    The cheapest airline one-way is Qantas Airways, with whom users have recently found tickets for as low as $843. However, be on the lookout for offers from Alaska Airlines and American Airlines, as they are both options that can get you from Washington, D.C. Dulles Intl Airport to Sydney for a low price.

  • Where are the most common layover locations when flying from Washington, D.C. Dulles Intl Airport to Sydney?

    Washington, D.C. Dulles Intl Airport to Sydney flights have a layover in Los Angeles most often.

  • What are some popular things to do or see while on a layover in Los Angeles?

    Hollywood Bowl, Hollywood Walk of Fame, and L.A. Live are currently the most popular points of interest in Los Angeles at the moment. Hollywood Bowl, Hollywood Walk of Fame, and L.A. Live are located about 12.5 mi, 11.7 mi, and 10.8 mi, respectively from Los Angeles. Travelers in need of a car in Los Angeles can rent one for about $39 per day.

  • Where are the least popular layover locations for Washington, D.C. Dulles Intl Airport to Sydney flights?

    The least popular layover on flights from Washington, D.C. Dulles Intl Airport to Sydney is Dallas.

  • Can I find deals for flights from Dulles Intl to Sydney that include hotel bookings?

    Yes. In addition to deals on Dulles Intl to Sydney flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Dulles Intl to Sydney?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Dulles Intl to Sydney.

  • Can I find deals for business class flights from Dulles Intl to Sydney?

    Yes. Cheapflights offers flight deals from Dulles Intl to Sydney by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

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

    Currently, February is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Sydney (average of $1,046). Flying from Washington, D.C. Dulles Intl Airport to Sydney in December is currently the most expensive (average of $1,643). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Washington, D.C. Dulles Intl Airport?

Book flights to Washington, D.C. Dulles Intl Airport if you plan to visit one of these locations
Wollongong
Parramatta
Coogee
Manly

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Top 7 airlines flying from Dulles Intl to Sydney

Discover the top 7 airlines that operate flights from Dulles Intl to Sydney. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated April 22, 2025.
AirlineCheapestAverageFlexibilityOn-time
Qantas AirwaysCheapest$827Average$1,058FlexibilityNo cancel feeOn-time74%
American AirlinesCheapest$830Average$871FlexibilityNo cancel feeOn-time71%
DeltaCheapest$853Average$973FlexibilityNo cancel feeOn-timeN/A
Air CanadaCheapest$1,036Average$1,290FlexibilityNo cancel feeOn-time67%
United AirlinesCheapest$1,194Average$1,597FlexibilityNo cancel feeOn-time69%
Air New ZealandCheapest$1,375Average$1,851FlexibilityNo cancel feeOn-time78%
ANACheapest$1,392Average$1,712FlexibilityNo cancel feeOn-time80%

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