No clear winner: United’s SLC → IAD flights land within a few points of 9 in 10 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 2 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.
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 | SLC | IAD | 4h 08m | 89% | 1.4% | 348 | Flying now |
Alternatives with one stop
All connections →| UnitedDetails → | SLC 05:15 → DEN 06:54UA 5683 · flown by SkyWest | 1h 06m Denver | DEN 08:00 → IAD 13:26UA 1101 | 6h 11m | 96% | 90% |
| UnitedDetails → | SLC 13:05 → DEN 14:51UA 4720 · flown by SkyWest | 49m Denver | DEN 15:40 → IAD 21:11UA 421 | 6h 06m | 85% | 60% |
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