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

View $99 flight on Wed, Oct 29, 2025Opens in a new window

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

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
Tue, Sep 2 - Thu, Sep 4
IAD
Washington
AUS
Austin
$197 Roundtrip, found 2 hours ago
$197
Roundtrip
found 2 hours ago
Select United flight, departing Tue, Sep 2 from Washington to Austin, returning Thu, Sep 4, priced at $197 found 2 hours ago
United
Mon, Nov 3 - Wed, Nov 12
IAD
Washington
AUS
Austin
$203 Roundtrip, found 1 day ago
$203
Roundtrip
found 1 day ago
Select United flight, departing Mon, Nov 3 from Washington to Austin, returning Wed, Nov 12, priced at $203 found 1 day ago
United
Wed, Oct 15 - Thu, Oct 16
IAD
Washington
AUS
Austin
$217 Roundtrip, found 1 day ago
$217
Roundtrip
found 1 day ago
Select United flight, departing Wed, Oct 15 from Washington to Austin, returning Thu, Oct 16, priced at $217 found 1 day ago
United
Tue, Oct 14 - Wed, Oct 15
IAD
Washington
AUS
Austin
$218 Roundtrip, found 1 day ago
$218
Roundtrip
found 1 day ago
Select United flight, departing Tue, Oct 14 from Washington to Austin, returning Wed, Oct 15, priced at $218 found 1 day ago
United
Mon, Sep 15 - Wed, Sep 17
IAD
Washington
AUS
Austin
$220 Roundtrip, found 4 days ago
$220
Roundtrip
found 4 days ago
Select United flight, departing Mon, Sep 15 from Washington to Austin, returning Wed, Sep 17, priced at $220 found 4 days ago
United
Mon, Sep 15 - Wed, Sep 17
IAD
Washington
AUS
Austin
$222 Roundtrip, found 4 days ago
$222
Roundtrip
found 4 days ago
Select United flight, departing Mon, Sep 15 from Washington to Austin, returning Wed, Sep 17, priced at $222 found 4 days ago
Flights from Washington (IAD) to Austin (AUS)
Origin airport
Washington Dulles Intl.
Destination airport
Austin-Bergstrom Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, Frontier Airlines, Hawaiian Airlines, Southwest Airlines, United
Popular airline
United
Distance
1295 mi
Average flight time
2 hours 28 mins

Frequently asked questions

How much is a United Airlines flight from Washington Dulles Intl. Airport (IAD) to Austin-Bergstrom Intl. Airport (AUS)?
Finding cheap one-way United Airlines flights from IAD to AUS from $99 on Expedia is easy --- just filter by "Price (lowest to highest)." Alternatively, check out our budget-friendly return fares from $197 for your next exciting vacation.**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 IAD to AUS with United Airlines?
Look for one-way or return flights to Austin in January or December. You could find cheaper fares with United Airlines during these off-season months.
What is the cheapest time to book flights from Washington Dulles Intl. Airport (IAD) to Austin-Bergstrom Intl. Airport (AUS) with United Airlines?
To find cheap United Airlines fares from Washington Dulles Intl. Airport (IAD) to Austin-Bergstrom Intl. Airport (AUS), start searching one to three months before your intended departure. Reserving 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 cost. Sunday is generally 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 Washington Dulles Intl. Airport (IAD) to Austin-Bergstrom Intl. Airport (AUS)?
Yes, you can travel from Washington Dulles Intl. Airport (IAD) to Austin-Bergstrom Intl. Airport (AUS) on any of United Airlines's 19 direct weekly flights. Make use of our "Nonstop" and "Airline" filters to find the United Airlines flight that'll take you to AUS at your preferred time.
How long does it take to fly from IAD to AUS with United Airlines?
Depart Washington Dulles Intl. Airport (IAD) for Austin-Bergstrom Intl. Airport (AUS) on a direct United Airlines flight, and you'll be in the sky for approximately 3h 54m.
Which day of the week has the most United Airlines flights from Washington Dulles Intl. Airport (IAD) to Austin-Bergstrom Intl. Airport (AUS)?
Saturday has the most United Airlines flights from Washington Dulles Intl. Airport (IAD) to Austin-Bergstrom Intl. Airport (AUS). With 3 daily departures, this is the best day of the week to find something that will suit your plans.
What is the earliest United Airlines flight from IAD to AUS?
The earliest United Airlines flight from IAD to AUS takes off at 8:25AM UTC-5, landing at 11:17AM UTC-6. If you want to jet off later in the day, the last United Airlines flight leaves IAD at 6:10PM UTC-5 and touches down at AUS at 9:14PM UTC-6. Flying earlier is often a smart choice as morning flights tend to experience fewer 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 Austin?
United Airlines flights from Washington Dulles Intl. Airport (IAD) to Austin touch down at Austin-Bergstrom Intl. Airport (AUS). This is the main gateway to this destination.
Why fly with United Airlines from IAD to AUS?
With a rewarding loyalty program, United Airlines is a top pick for many travelers journeying from IAD to AUS. Plus, if you're a United Mileage Plus and One Key™ member booking through Expedia, you could earn OneKeyCash™* on eligible flights along with your airline miles.*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 Washington Dulles Intl. Airport (IAD) to Austin-Bergstrom Intl. Airport (AUS)?
For the Washington Dulles Intl. Airport (IAD) to Austin-Bergstrom Intl. Airport (AUS) route, United Airlines typically flies Airbus A320 and Embraer 175 planes. Don't forget that last-minute changes can occur for operational reasons, meaning your flight may be on a different aircraft.
Can I change or cancel my United Airlines flight from Washington Dulles Intl. Airport (IAD) to Austin-Bergstrom Intl. Airport (AUS)?
Changes are often free within 24 hours of making your booking, but your airline may add a charge after that time. For more details about altering your flights, head to your "Trips," select your flight and click on "Manage Booking." If you want the freedom to change your itinerary without additional costs, tick the "No cancel fee" or "Changes included" filter when planning your next trip.

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