BTS DATA COMPLETE THROUGH JUNE 2026HISTORICAL ODDS · NOT LIVE FLIGHT STATUS
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IAD→AUS

Washington, DC (IAD) to Austin, TX (AUS) flight delay odds

83.1% of 1,049 official scheduled IAD-to-AUS flights arrived on time; 9.7% arrived at least 30 minutes late and 0.8% were cancelled during July 2025–June 2026.

Source: U.S. Bureau of Transportation Statistics · Reporting window: July 2025–June 2026 · Updated September 16, 2026

HISTORICAL ROUTE SIGNALLower disruption
83.1%arrived on time
9.7%30+ min late
0.8%cancelled
1,049scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late5.8%all scheduled flights
120+ minutes late2.5%all scheduled flights
Diverted0.2%did not reach as scheduled
Average arrival-0.7 mincompleted flights

Which departure time was most reliable for IAD to AUS?

Among qualifying IAD-to-AUS departure window results, Early morning had the highest on-time rate: 92.8% of 319 flights. Evening was lowest at 74.2% across 357 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning31992.8%4.4%0.3%
Afternoon35883.0%8.9%0.8%
Evening35774.2%15.7%1.1%

Which weekday was most reliable for IAD to AUS?

Among qualifying IAD-to-AUS weekday results, Thursday had the highest on-time rate: 88.4% of 155 flights. Saturday was lowest at 78.3% across 106 flights.

DayFlightsOn time30+ minCancelled
Monday16982.2%10.1%1.2%
Tuesday15488.3%9.1%0.0%
Wednesday15479.9%13.0%0.0%
Thursday15588.4%4.5%0.6%
Friday16982.8%7.7%0.0%
Saturday10678.3%12.3%1.9%
Sunday14280.3%12.7%2.1%

Which airline was most reliable for IAD to AUS?

Only United Airlines met the IAD-to-AUS airline threshold: 83.4% of 1,007 scheduled flights arrived on time during July 2025–June 2026.

AirlineFlightsOn time30+ minCancelled
United Airlines1,00783.4%9.6%0.8%
Allegiant Air2475.0%16.7%0.0%
Republic Airways1877.8%5.6%0.0%

Which month was most reliable for IAD to AUS?

Among qualifying IAD-to-AUS month results, September 2025 had the highest on-time rate: 92.7% of 109 flights. July 2025 was lowest at 69.8% across 96 flights.

MonthFlightsOn time30+ minCancelled
July 20259669.8%19.8%0.0%
August 202510283.3%6.9%2.0%
September 202510992.7%4.6%0.0%
October 20258992.1%2.2%0.0%
November 20257986.1%8.9%0.0%
December 20257776.6%13.0%0.0%
January 20267177.5%9.9%7.0%
February 20267686.8%6.6%0.0%
March 20269284.8%8.7%0.0%
April 20268289.0%7.3%0.0%
May 20268884.1%6.8%0.0%
June 20268872.7%22.7%1.1%

What drove IAD to AUS delay minutes?

Late aircraft was the largest recorded IAD-to-AUS delay category, accounting for 34.0% of 11,080 BTS-attributed delay minutes during July 2025–June 2026.

Airline28.1%
Late aircraft34.0%
National airspace25.3%
Weather12.7%
Security0.0%
This is historical evidence, not a forecast.

Weather, schedules and operations change. For a trip you have already booked, use the airline or airport for live status.