No clear winner: Delta’s IAD → SEA flights land within a few points of 78% 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.
| DL 1015 | IAD 07:00 | SEA 09:45 | 79% |
All 1 Delta 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.
| DL 1015 | IAD 07:00 | SEA 09:45 | 5h 45m | 349 | 79% | 1.1% | 102 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.
| Delta | IAD | SEA | 5h 57m | 78% | 1.4% | 361 | Flying now |
Alternatives with one stop
All connections →| DeltaDetails → | IAD 07:15 → SLC 09:52DL 432 | 1h 43m Salt Lake City | SLC 11:35 → SEA 12:52DL 2995 | 8h 37m | 94% | 82% |
| DeltaDetails → | IAD 06:00 → MSP 07:55DL 3996 · flown by SkyWest | 1h 10m Minneapolis | MSP 09:05 → SEA 10:59DL 868 | 7h 59m | 93% | 79% |
| DeltaDetails → | IAD 11:44 → MSP 13:39DL 3699 · flown by SkyWest | 1h 36m Minneapolis | MSP 15:15 → SEA 17:00DL 877 | 8h 16m | 95% | 71% |
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