No clear winner: United’s IAD → RDU flights land within a few points of 83% on time whatever the hour.
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).
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.
No United flight on this route ran 150+ times in the year.
All 6 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 529 | IAD 08:21 | RDU 09:34 | 1h 13m | 37 | 69% | 2.7% | 44 min |
| UA 1536 | IAD 08:21 | RDU 09:34 | 1h 13m | 87 | 95% | 0.0% | 61 min |
| UA 4045flown by Mesa | IAD 12:50 | RDU 14:08 | 1h 18m | 28 | 82% | 0.0% | 47 min |
| UA 4055flown by Mesa | IAD 12:50 | RDU 14:08 | 1h 18m | 31 | 80% | 0.0% | 80 min |
| UA 3624flown by Republic | IAD 17:30 | RDU 18:55 | 1h 25m | 81 | 71% | 4.9% | 97 min |
| UA 2382 | IAD 22:25 | RDU 23:44 | 1h 19m | 147 | 76% | 1.4% | 79 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 | RDU | 1h 14m | 83% | 1.2% | 1,452 | Flying now |
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