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1,125 nonstop flights · Aug 2025 – Jul 2026 · US DOT on-time records, all US airlines

Leave before 9 am: 95% depart on time. After 4 pm it’s 4 in 5.

Best time to leave 8–9 am 92% arrive on time from IAD
Best single flight UA 637 IAD 08:30 → AUS 10:56 · 93% on time Avoid UA 2337 IAD 18:00 → AUS 20:35 · 80% on time

Time of day × airport

Share of this route’s flights leaving within 15 minutes, by airport and scheduled departure hour, over Aug 2025 – Jul 2026. Blank: no flights then (or fewer than 40 in the year).

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IAD
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% of this route’s flights leaving within 15 min (small number: flights in the Jun 6 – Jul 31, 2026 schedule): 85+75–8465–7455–64under 55
Austin flights leaving IAD 8–9 am: 3Close ×
UA 2447 IAD 08:30 AUS 10:56 3h 26m 10 90% 0.0% 39 min
UA 637 IAD 08:30 AUS 10:56 3h 26m 261 93% 0.8% 57 min
UA 1734 IAD 08:30 AUS 10:56 3h 26m 15 87% 0.0% 78 min

Airlines on this route

Arriving within 15 minutes. Regional flights count under the airline that sells them. Pick an airline to see its flights.

United (incl. Mesa, Republic) 1,101 86% 0.9% 66 min
Allegiant 24 – 0.0% 62 min

Dimmed: fewer than 150 flights in the year, too few to rank.

Flights, best and worst

Flights in the Jun 6 – Jul 31, 2026 schedule that ran 150+ times in the year. Times are local. Pick a flight for its history.

UA 637 IAD 08:30 AUS 10:56 93%
UA 2337 IAD 18:00 AUS 20:35 80%
All 6 flights on this route →

Nonstops by airline and airport

Arriving within 15 minutes, Aug 2025 – Jul 2026. Pick a row to see that airline’s flights on that airport pair.

United IAD AUS 3h 30m 86% 0.9% 1,101 Flying now
Allegiant IAD AUS 3h 16m 67%few flights 0.0% 24 Flying now
Flying on a particular day? Pick a date above and the same ranking uses our forecast odds for each flight that day: Tomorrow.

About this data: US DOT on-time records, Aug 2025 – Jul 2026, all US airlines; regional flights count under the airline that sells them. Schedules (which flights and connections exist, and their times) are as of Jun 6 – Jul 31, 2026; seasonal flights outside that window aren’t ranked. Rebuilt monthly. JSON