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4,078 nonstop flights · Aug 2025 – Jul 2026 · US DOT on-time records, all US airlines

Leave before 9 am: 9 in 10 depart on time. After 4 pm it’s 7 in 10.

Best time to leave 8–9 am 89% arrive on time from IAD
Best single flight DL 2127 IAD 06:00 → ATL 07:46 · 90% on time Avoid UA 2081 IAD 17:17 → ATL 19:16 · 70% 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
90
86
92
86
82
80
85
79
76
74
58
66
54
79
% 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.

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) 1,202 81% 0.7% 79 min
Delta 2,224 81% 2.8% 98 min
Frontier 652 70% 2.1% 83 min

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.
DL 2127 IAD 06:00 ATL 07:46 90%
UA 2739 IAD 08:15 ATL 10:14 89%
UA 471 IAD 12:35 ATL 14:34 86%
DL 1324 IAD 10:21 ATL 12:05 85%
DL 1444 IAD 12:37 ATL 14:34 83%
· · ·
DL 1695 IAD 17:51 ATL 19:54 74%
F9 4707 IAD 07:30 ATL 09:44 71%
UA 2081 IAD 17:17 ATL 19:16 70%
All 15 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 ATL 2h 01m 81% 0.7% 1,202 Flying now
Delta IAD ATL 1h 58m 81% 2.8% 2,224 Flying now
Frontier IAD ATL 2h 16m 70% 2.1% 652 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