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Showing United only (incl. its regional partners)All airlines ×
1,101 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

Pick an hour to see this route’s flights leaving then.

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 5 United flights in the current schedule

Every flight that flew in the Jun 6 – Jul 31, 2026 schedule, with its record over Aug 2025 – Jul 2026. Times are local. Click a column to sort.
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
UA 2746 IAD 13:10 AUS 15:37 3h 27m 137 82% 0.0% 61 min
UA 2337 IAD 18:00 AUS 20:35 3h 35m 303 80% 1.3% 78 min

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
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