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7,728 nonstop flights · Aug 2025 – Jul 2026 · US DOT on-time records, all US airlines

Leave before 9 am: 94% depart on time. After 4 pm it’s 72%.

Best time to leave 5–6 am 96% arrive on time from SLC
Best single flight UA 1232 SLC 07:00 → DEN 08:42 · 95% on time Avoid DL 1586 SLC 18:30 → DEN 20:02 · 71% 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).

5
6
7
8
9
10
11
12
13
14
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18
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20
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SLC
95
96
94
91
89
84
80
82
84
78
54
68
73
74
67
68
75
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
Denver flights leaving SLC 8–9 am: 2Close ×
F9 3862 SLC 08:16 DEN 10:01 1h 39m 360 81% 0.3% 49 min
UA 5642flown by SkyWest SLC 08:30 DEN 10:27 1h 57m 224 81% 0.0% 63 min

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. SkyWest) 2,703 84% 0.5% 67 min
Delta 1,696 81% 0.2% 69 min
Frontier 1,023 80% 0.8% 79 min
Southwest 2,306 74% 0.6% 49 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.
UA 1232 SLC 07:00 DEN 08:42 95%
UA 5683flown by SkyWest SLC 05:15 DEN 06:54 95%
UA 4720flown by SkyWest SLC 13:05 DEN 14:51 92%
DL 1623 SLC 13:20 DEN 14:56 85%
DL 1553 SLC 10:15 DEN 11:53 84%
· · ·
UA 1662 SLC 14:28 DEN 16:11 79%
F9 3982 SLC 15:41 DEN 17:21 78%
DL 1586 SLC 18:30 DEN 20:02 71%
All 27 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 SLC DEN 1h 41m 84% 0.5% 2,703 Flying now
Delta SLC DEN 1h 35m 81% 0.2% 1,696 Flying now
Frontier SLC DEN 1h 39m 80% 0.8% 1,023 Flying now
Southwest SLC DEN 1h 30m 74% 0.6% 2,306 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