$99 Cheap United flights Austin (AUS) to Washington (IAD)

View $99 flight on Mon, Sep 8, 2025Opens in a new window

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$99 Cheap United flights Austin (AUS) to Washington (IAD)

Prices were available within the past 7 days and start at $99 for one-way flights and $197 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Thu, Sep 25 - Mon, Sep 29
AUS
Austin
IAD
Washington
$197 Roundtrip, found 1 hour ago
$197
Roundtrip
found 1 hour ago
Select United flight, departing Thu, Sep 25 from Austin to Washington, returning Mon, Sep 29, priced at $197 found 1 hour ago
United
Thu, Sep 25 - Mon, Sep 29
AUS
Austin
IAD
Washington
$209 Roundtrip, found 1 hour ago
$209
Roundtrip
found 1 hour ago
Select United flight, departing Thu, Sep 25 from Austin to Washington, returning Mon, Sep 29, priced at $209 found 1 hour ago
United
Thu, Sep 25 - Mon, Sep 29
AUS
Austin
IAD
Washington
$218 Roundtrip, found 1 hour ago
$218
Roundtrip
found 1 hour ago
Select United flight, departing Thu, Sep 25 from Austin to Washington, returning Mon, Sep 29, priced at $218 found 1 hour ago
United
Thu, Sep 25 - Mon, Sep 29
AUS
Austin
IAD
Washington
$220 Roundtrip, found 1 hour ago
$220
Roundtrip
found 1 hour ago
Select United flight, departing Thu, Sep 25 from Austin to Washington, returning Mon, Sep 29, priced at $220 found 1 hour ago
United
Thu, Sep 25 - Mon, Sep 29
AUS
Austin
IAD
Washington
$221 Roundtrip, found 1 hour ago
$221
Roundtrip
found 1 hour ago
Select United flight, departing Thu, Sep 25 from Austin to Washington, returning Mon, Sep 29, priced at $221 found 1 hour ago
United
Thu, Sep 25 - Mon, Sep 29
AUS
Austin
IAD
Washington
$223 Roundtrip, found 1 hour ago
$223
Roundtrip
found 1 hour ago
Select United flight, departing Thu, Sep 25 from Austin to Washington, returning Mon, Sep 29, priced at $223 found 1 hour ago
Flights from Austin (AUS) to Washington (IAD)
Origin airport
Austin-Bergstrom Intl.
Destination airport
Washington Dulles Intl.
Airlines serving
American Airlines, Delta, Frontier Airlines, Southwest Airlines, United
Popular airline
United
Distance
1295 mi
Average flight time
4 hours 15 mins

Frequently asked questions

How much is a United Airlines flight from Austin-Bergstrom Intl. Airport (AUS) to Washington Dulles Intl. Airport (IAD)?
Make use of the "Price (lowest to highest)" filter on Expedia to look for cheap United Airlines round-trip flights from $197 from AUS to IAD. Affordable one-way options from $99 are also available.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.
What is the cheapest month to fly from AUS to IAD with United Airlines?
January is one of the cheapest months to travel to Washington with United Airlines. You could also find great prices on return and one-way fares in February.
What is the cheapest time to book flights from Austin-Bergstrom Intl. Airport (AUS) to Washington Dulles Intl. Airport (IAD) with United Airlines?
For cheap United Airlines fares from Austin-Bergstrom Intl. Airport (AUS) to Washington Dulles Intl. Airport (IAD), start searching one to three months before your intended departure. Securing domestic flights 34 to 86 days in advance could save you 25% compared to booking just 6 to 12 days ahead. The day you book can also influence the price you pay. Sunday tends to be the cheapest, while Monday is often the most expensive for domestic flights. You can save 6% on average by booking your journey on a Sunday.**Ideal booking window recommendation is based on average round-trip ticket prices for January through November for 2024. Best day of the week to book recommendation is based on average round-trip ticket prices for January through October 2024. All data sourced from ARC's global airline sales database.
Does United Airlines fly nonstop from Austin-Bergstrom Intl. Airport (AUS) to Washington Dulles Intl. Airport (IAD)?
Take off on one of United Airlines's 19 direct weekly flights from Austin-Bergstrom Intl. Airport (AUS) to Washington Dulles Intl. Airport (IAD). To see your options, enter your origin, destination and dates and hit search. Then use the "Nonstop" and "Airline" filters.
How long does it take to fly from AUS to IAD with United Airlines?
It takes approximately 3h 12m to fly nonstop from Austin-Bergstrom Intl. Airport (AUS) to Washington Dulles Intl. Airport (IAD) with United Airlines.
Which day of the week has the most United Airlines flights from Austin-Bergstrom Intl. Airport (AUS) to Washington Dulles Intl. Airport (IAD)?
United Airlines has the most flights from Austin-Bergstrom Intl. Airport (AUS) to Washington Dulles Intl. Airport (IAD) on Thursday. With up to 3 daily departures, you'll get the most flexibility on this day.
What is the earliest United Airlines flight from AUS to IAD?
The first United Airlines flight from AUS to IAD departs at 7:05AM UTC-6, arriving at 11:22AM UTC-5. If you'd like to set off later in the day, the last United Airlines flight leaves AUS at 5:15PM UTC-6 and lands at IAD at 9:25PM UTC-5. Flying earlier is generally a good idea as morning flights are least likely to experience cancellations.**Most reliable time of the day recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports does United Airlines fly into in Washington?
When flying from Austin-Bergstrom Intl. Airport (AUS) to Washington with United Airlines, you'll most likely arrive at Washington Dulles Intl. Airport (IAD). This is the airline's primary hub here. Other nearby airports such as Baltimore Washington Intl. Thurgood Marshall Airport (BWI) and Ronald Reagan Washington National Airport (DCA) may have more affordable fares, so it's smart to explore all your options on Expedia.
Why fly with United Airlines from AUS to IAD?
A rewarding loyalty program and the ability to collect points through United Mileage Plus are the start of the reasons to depart from AUS to IAD with United Airlines. Plus, when you join Expedia's free One Key™ program, you can earn OneKeyCash™* on top of United Airlines's loyalty program earnings. It's yours to spend on your next adventure.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.
What type of plane does United Airlines fly from Austin-Bergstrom Intl. Airport (AUS) to Washington Dulles Intl. Airport (IAD)?
For the Austin-Bergstrom Intl. Airport (AUS) to Washington Dulles Intl. Airport (IAD) route, United Airlines typically uses Airbus A320 and Embraer 175 planes. Don't forget that last-minute changes can occur for operational needs, so your flight could be on a different aircraft.
Can I change or cancel my United Airlines flight from Austin-Bergstrom Intl. Airport (AUS) to Washington Dulles Intl. Airport (IAD)?
Depending on the ticket type you purchased, a fee will generally apply if you modify or cancel your booking more than 24 hours after it's confirmed. To find tickets with more flexibility, select our "Changes included" and "No cancel fee" boxes while searching for flights. For more details on canceling or changing your reservation, visit "Trips," select your flight and tick "Manage Booking."

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