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$137+ Cheap flights from Washington, D.C. Dulles Intl Airport

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 6/12. 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.
IAD — SYD
6 Dec — 13 Dec1
1 adult
1 adult, Economy, 0 bags

What to know about flights from Dulles Intl

Discover essential information about flights departing from Dulles Intl, including flight schedules, destinations, airlines operating at the Dulles Intl airport, and any specific guidelines or requirements for travellers. Please note that the information is based on the most recent updates available. Data last updated 6 November 2025.

Good round-trip deal

$530 or less

Good one-way deal

$603 or less
Price to beat on a round-trip flight from Washington, D.C. Dulles Intl.
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Price to beat on a one-way flight from Washington, D.C. Dulles Intl.
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Enter your travel dates to find the best prices.

Cheapest flights from Dulles Intl
Explore the most affordable flight options available from Dulles Intl. Find the lowest fares based on data from user searches, with prices last updated on 6 November 2025.

Sat 6/1222:10IAD - DEN
Nonstop4h 05mUnited Airlines
Sat 13/1208:05DEN - IAD
Nonstop3h 18mUnited Airlines
Deal found 6/11$273
Sat 10/115:45IAD - DEN
Nonstop4h 05mSouthwest
Fri 16/117:25DEN - IAD
Nonstop3h 15mSouthwest
Deal found 4/11$303
Sat 6/1215:55IAD - DEN
Nonstop3h 55mSouthwest
Sat 13/1217:05DEN - IAD
Nonstop3h 10mSouthwest
Deal found 5/11$322
Sat 6/1206:00IAD - DEN
1 stop6h 18mDelta
Sat 6/1215:52DEN - IAD
1 stop5h 16mDelta
Deal found 4/11$334
Sun 7/1208:20IAD - LAS
Nonstop5h 13mUnited Airlines
Tue 9/1208:30LAS - IAD
Nonstop4h 29mUnited Airlines
Deal found 5/11$347
Sun 7/1206:00IAD - DEN
1 stop6h 18mDelta
Wed 10/1216:44DEN - IAD
1 stop5h 28mDelta
Deal found 4/11$350
Sat 6/1219:32IAD - LAS
Nonstop5h 20mUnited Airlines
Sat 13/1219:04LAS - IAD
1 stop8h 47mUnited Airlines
Deal found 5/11$356
Thu 5/219:36IAD - LAS
Nonstop5h 21mUnited Airlines
Fri 6/200:30LAS - IAD
1 stop8h 16mUnited Airlines
Deal found 5/11$362
Thu 4/1219:35IAD - DEN
1 stop6h 32mDelta
Mon 8/1207:00DEN - IAD
1 stop8h 00mDelta
Deal found 4/11$365
Fri 5/1207:40IAD - DEN
Nonstop3h 50mSouthwest
Mon 8/1206:30DEN - IAD
1 stop8h 35mSouthwest
Deal found 5/11$368
Thu 29/122:32IAD - DEN
Nonstop3h 58mUnited Airlines
Sun 1/223:59DEN - IAD
Nonstop3h 22mUnited Airlines
Deal found 5/11$373
Fri 16/117:40IAD - DEN
Nonstop4h 15mSouthwest
Tue 20/116:45DEN - IAD
Nonstop3h 10mSouthwest
Deal found 5/11$374

Find flights from Dulles Intl within your budget

 
Find flights departing from Dulles Intl that match your specified budget. Filter results by price range, allowing you to narrow down options and find flights that fit within your financial constraints. Please note that the search results are based on data from user searches, with fares last updated on 6 November 2025. In the last 7 days, Cheapflights users made a total of 647,157 searches

Fly to

Sydney

Route

Depart

Return

Price

Washington, D.C.Denver

IAD - DEN

IADDEN

Washington, D.C. Dulles Intl

Sat 6/12

15:55-17:50

Nonstop3h 55m

Denver Intl

Sun 7/12

18:15-23:30

Nonstop3h 15m

$303

Washington, D.C.Denver

IAD - DEN

IADDEN

Washington, D.C. Dulles Intl

Tue 24/2

09:05-11:15

Nonstop4h 10m

Denver Intl

Thu 26/2

17:50-23:10

Nonstop3h 20m

$303

Washington, D.C.Denver

IAD - DEN

IADDEN

Washington, D.C. Dulles Intl

Wed 28/1

06:00-10:10

1 stop6h 10m

Denver Intl

Fri 30/1

00:30-09:16

1 stop6h 46m

$334

Washington, D.C.Denver

IAD - DEN

IADDEN

Washington, D.C. Dulles Intl

Thu 15/1

17:15-19:28

Nonstop4h 13m

Denver Intl

Fri 23/1

07:50-13:17

Nonstop3h 27m

$334

Washington, D.C.Denver

IAD - DEN

IADDEN

Washington, D.C. Dulles Intl

Fri 16/1

22:32-00:32

Nonstop4h 00m

Denver Intl

Mon 19/1

23:59-05:21

Nonstop3h 22m

$334

Washington, D.C.Denver

IAD - DEN

IADDEN

Washington, D.C. Dulles Intl

Fri 30/1

07:00-14:02

1 stop9h 02m

Denver Intl

Mon 2/2

00:30-09:16

1 stop6h 46m

$350

Washington, D.C.Denver

IAD - DEN

IADDEN

Washington, D.C. Dulles Intl

Thu 11/12

17:59-00:07

1 stop8h 08m

Denver Intl

Mon 15/12

00:50-09:11

1 stop6h 21m

$350

Washington, D.C.Las Vegas

IAD - LAS

IADLAS

Washington, D.C. Dulles Intl

Mon 26/1

19:36-21:57

Nonstop5h 21m

Las Vegas Harry Reid Intl

Mon 2/2

19:06-07:14

1 stop9h 08m

$356

Washington, D.C.Las Vegas

IAD - LAS

IADLAS

Washington, D.C. Dulles Intl

Wed 25/2

12:40-15:09

Nonstop5h 29m

Las Vegas Harry Reid Intl

Wed 25/2

00:59-11:21

1 stop7h 22m

$362

Washington, D.C.Las Vegas

IAD - LAS

IADLAS

Washington, D.C. Dulles Intl

Sun 15/2

12:40-15:09

Nonstop5h 29m

Las Vegas Harry Reid Intl

Tue 17/2

00:59-11:21

1 stop7h 22m

$362

Flights are sorted by cheapest return flights first.

Deals found on 5/11

Showing 1-10 of 60 results
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Best time to book a flight from Dulles Intl

Have a flexible travel schedule? Discover the best time to fly from Dulles Intl with our price prediction graph.
Estimated return 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.

Travel insights for flights from Dulles Intl

Get recent, data-driven insights about flights from Dulles Intl including ideal travel times, pricing trends, and more.

When is the best time to book a flight from Washington, D.C. Dulles Intl Airport?

Use this chart to determine the optimal time to book a return flight from Dulles Intl to Sydney. Price data was last updated on 31 October 2025.

The best time to book flights from Washington, D.C. Dulles Intl Airport is 80 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

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

Currently, December is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport (average of $1,000). Flying from Washington, D.C. Dulles Intl Airport in January will prove the most costly (average of $1,328). There are multiple factors that influence the price of a flight so comparing airlines, departure airports and times can help keep costs down.

Which airlines fly from Washington, D.C. Dulles Intl Airport?

When flying from Washington, D.C. Dulles Intl Airport check dates and pricing for the following: United Airlines. As it departs for the following popular destinations: Sydney.

United Airlines
United Airlines
From $294

What are popular destinations to fly to from Washington, D.C. Dulles Intl Airport?

Washington, D.C. Dulles Intl Airport offers frequent flights to London (340 flights per day), Detroit (286 flights per day) and Orlando (276 flights per day).

New Delhi Indira Gandhi Intl
New Delhi Indira Gandhi Intl
From $670
Albany Intl
Albany Intl
From $530
Abu Dhabi Zayed Intl
Abu Dhabi Zayed Intl
From $986
Brussels Bruxelles-National
Brussels Bruxelles-National
From $1,191

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

The cheapest city to fly to from Washington, D.C. Dulles Intl Airport is Los Angeles, with prices starting at $337. Explore other affordable destinations below.

Los Angeles
Los Angeles
From $337
Albany Intl
Albany Intl
From $530
Lisbon Humberto Delgado
Lisbon Humberto Delgado
From $538
New Delhi Indira Gandhi Intl
New Delhi Indira Gandhi Intl
From $670

Airline reviews for flights from Dulles Intl

Get insights into the airlines that provide service from Dulles Intl. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing airline for your flight from Dulles Intl. In the last 7 days, Cheapflights users made a total of 647,157 searches.
Read reviews from past customers who have flown United Airlines from Washington, D.C. Dulles Intl Airport. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,004 reviews
Check prices

Entertainment

7.1

Overall

7.4

Boarding

7.7

Crew

8.1

Comfort

7.3

Food

6.6

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000
United Airlines
7.4
Good
9,004 reviews
United Airlines
7.4
Good
9,004 reviews
Check prices

Entertainment

7.1

Overall

7.4

Boarding

7.7

Crew

8.1

Comfort

7.3

Food

6.6

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000

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Alternate flight departure points to Dulles Intl

Consider leaving from one of these other departure points that are located a short distance from Dulles Intl. Flight origins were last updated on 6 November 2025.
Flights from Reagan-National

Related info for your journey

Access useful and relevant information related to your journey from Dulles Intl. This can include details such as airport transportation, visa requirements, travel insurance, luggage regulations, and any other information that can ensure a smooth and hassle-free travel experience. Please note that the information is based on general guidance and may need to be verified with official sources. Data last updated 6 November 2025.

  • What are the most popular destinations to fly to from Washington, D.C. Dulles Intl Airport?

    For the current month, the most popular flights from Washington, D.C. Dulles Intl Airport are Mumbai, Ahmedabad, Atlanta. Mumbai, Cairo, Ahmedabad are the most popular locations from Washington, D.C. Dulles Intl Airport year round.

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

    Users have flown out of Washington, D.C. Dulles Intl Airport for as low as $337 to Los Angeles (prices may vary depending on the airline and departure time). On average, users have booked flights for $1,840 to fly from Washington, D.C. Dulles Intl Airport.

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

    Options for some of the cheapest premium economy flights from Washington, D.C. Dulles Intl Airport we have found on Cheapflights are as follows:
    Fly from Washington, D.C. Dulles Intl to London Heathrow Airport starting at $2,569

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

    Currently, the cheapest month for flights from Washington, D.C. Dulles Intl Airport is December. The most expensive month for flights is January. The cheapest prices are shown above but prices will vary according to departure times, airlines, class and how early you book.

  • Where are the cheapest places to fly to from Washington, D.C. Dulles Intl Airport?

    View the cheapest flight destinations from Washington, D.C. Dulles Intl Airport:
    Fly from Washington, D.C. to Sydney from $1,617 round trip
    Fly from Washington, D.C. to Melbourne from $1,948 round trip

  • How does Cheapflights help users find flights from Dulles Intl?

    Cheapflights helps you search for flights from Dulles Intl via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

  • Why should you use Cheapflights to find cheap flight tickets from Dulles Intl?

    Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from Dulles Intl for you. Better yet — we are completely free to use.

  • Can Cheapflights find flights from Dulles Intl with no change fees?

    Need flexible booking options for your flight from Dulles Intl ? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

  • Can Cheapflights notify me if prices for flights from Dulles Intl become cheaper?

    Yes, Cheapflights has a feature called Price Alerts, which offers users the ability to be notified when flight prices change. Track prices for your flight from Dulles Intl today and book when you’re ready!

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Cheapflights helps you search for flights from Dulles Intl via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

Why should you use Cheapflights to find cheap flight tickets from Dulles Intl?

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from Dulles Intl for you. Better yet — we are completely free to use.

Can Cheapflights find flights from Dulles Intl with no change fees?

Need flexible booking options for your flight from Dulles Intl ? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

Can Cheapflights notify me if prices for flights from Dulles Intl become cheaper?

Yes, Cheapflights has a feature called Price Alerts, which offers users the ability to be notified when flight prices change. Track prices for your flight from Dulles Intl today and book when you’re ready!

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