The cheapest times to fly from AUS to IAD are

  • January 1st to March 4th
  • August 6th to November 18th
  • December 3rd to December 16th

based on data collected exclusively by Champion Traveler across tens of millions of flights. Among all the dates above, the very cheapest time to fly from AUS to IAD is mid to late September. Prices can be as high as $901 for Sunday flights during early to mid May, or as low as $201 for Tuesday flights around mid to late September.


When to Fly to Washington

Flying from Austin, TX (AUS) to Washington, DC (IAD) will usually cost between $204 to $511 per person if booking more than four weeks in advance. On average the very cheapest time to fly is mid to late September with an average ticket price of $223. Due to high demand the most expensive time to fly is early to mid May, with an average price of $494. Planning your trip to low-cost times can easily save you $271 on economy flights and even more on first-class flights. Generally, any price below $340 can be considered a good price for a round-trip AUS to IAD flight.

See below for a graph of average weekly prices for the AUS to IAD route. All prices are for round-trip tickets in USD.

AUS to IAD Flight Prices

Compared to other flights, the AUS to IAD flight is much cheaper than the average and costs much less than the average flight leaving from Austin. The average price per mile (for a direct flight) is $0.16, which is far below average.


Flight Prices by Day of the Week

Tuesday is usually the cheapest day to depart and return on this flight. Sundays are the most expensive days to fly out or take a return trip. Selecting flights on the least expensive days could save you up to $106 (27%) on this flight.

Departing prices are for round-trip flights returning on the day of departure. For example, a flight departing on Tuesday and returning a week later will cost an average of $291. Return trip prices are from the IAD to AUS flight, and often highlight the quality of our data in showing the same trend.

Departing Prices by Day

Departure Day Prices

Return Trip Prices by Day

Return Day Prices


Nonstop Flights and Layovers

Travelers looking to fly from AUS to IAD can generally find a 0-layover flight. Because there is a direct flight option the real-world direct flight time of 3 hour 19 minutes may be realistic.


Alternative Nearby Airports

Champion Traveler tells you which airports are nearby and whether tickets might be cheaper alternative airports nearby. Sometimes it’s worth it to fly into a closer airport and then commute to your destination. Remember that there is a nonstop flight from AUS to IAD while comparing.

Destination alternative #1: Baltimore/Washington International Thurgood Marshall Airport (BWI) in Baltimore, MD

  • 45 miles (72 km) away from IAD
  • Usually 21.06% less expensive than IAD
  • Nonstop flights available

See AUS to BWI flights

Destination alternative #2: Harrisburg International Airport (MDT) in Harrisburg, PA

  • 94 miles (151 km) away from IAD
  • Usually 3.39% less expensive than IAD
  • 1-layover flights available

See AUS to MDT flights

Destination alternative #3: Richmond International Airport (RIC) in Richmond, VA

  • 100 miles (161 km) away from IAD
  • Usually 1.33% less expensive than IAD
  • 1-layover flights available

See AUS to RIC flights


Flight Questions Answered

Still have questions about flying from AUS to IAD? We’ve got answers.

Which airlines fly this route?

You can find 10 major airlines flying this route most often: Alaska, American, Delta, Fiji Airways, Frontier, Qantas, Singapore Airlines, Southwest, Sun Country Airlines, United, and potentially more during busy seasons.

How far away is it from Washington Dulles International Airport to Austin – Bergstrom International Airport?

The distance between the two airports is roughly 1295 miles or 2084 kilometers.

How long does it take to fly from AUS to IAD?

The real-world flight time for a nonstop AUS to IAD flight is about 3 hour 19 minutes.

How many flights go between Austin, TX and Washington, DC?

It depends on the day of the week and the date, but a typical day might have around 92 available flights from AUS to IAD.


Airport Location Info


Departing Airport

Origination code AUS
Origination airport name Austin – Bergstrom International Airport
City Austin, TX
Country the United States
Latitude 30.2
Longitude -97.7

Return Airport

Destination code IAD
Destination airport name Washington Dulles International Airport
City Washington, DC
Country the United States
Latitude 38.9
Longitude -77.5


Late and Early Flight Data

Flights from AUS to IAD tend to depart as late as the average flight. According to our recently updated data, 25% of flights departed 5 or more minutes late, and 26% of flights left 5 or more minutes early. On average you can expect to leave IAD heading for AUS about 19 minutes late. This does significantly impact arrival time, as the average landing time in Washington, DC is about 18 minutes late. The numbers below show a recent average of take-off times versus the scheduled departure flight:

  • United: 29 minutes late
  • Mesa: 16 minutes late
  • Frontier: 10 minutes late
  • Some airlines not reporting


Other Resources

Please note that while we’ve worked hard to analyzed tens of millions of flights to get you this data, we do not calculate current live prices or guarantee pricing. Please see our partners using the links above for current offers.