No clear winner: Delta’s SEA → MIA flights land within a few points of 4 in 5 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 506 | SEA 08:25 | MIA 17:31 | 80% |
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 506 | SEA 08:25 | MIA 17:31 | 6h 06m | 365 | 80% | 1.4% | 63 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 | SEA | MIA | 6h 06m | 80% | 1.4% | 365 | Flying now |
Alternatives with one stop
All connections →| DeltaDetails → | SEA 21:45 → ATL 05:36DL 567 | 1h 54m Atlanta | ATL 07:30 → MIA 09:30 +1DL 2836 | 8h 48m | 98% | 85% |
| DeltaDetails → | SEA 17:59 → SLC 21:09DL 1165 | 1h 51m Salt Lake City | SLC 23:00 → MIA 05:42 +1DL 2040 | 8h 43m | 94% | 84% |
| DeltaDetails → | SEA 22:58 → ATL 06:45DL 409 | 2h 10m Atlanta | ATL 08:55 → MIA 10:57 +1DL 1510 | 8h 58m | 100% | 82% |
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