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6,033 nonstop flights · Aug 2025 – Jul 2026 · US DOT on-time records, all US airlines

Leave before 9 am: 9 in 10 depart on time. After 4 pm it’s 7 in 10.

Best time to leave 6–7 am 90% arrive on time from SAN
Best single flight UA 2476 SAN 08:45 → DEN 12:17 · 89% on time Avoid UA 682 SAN 16:07 → DEN 19:39 · 77% 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).

6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
SAN
93
85
88
85
81
85
75
50
55
58
71
55
81
57
77
81
% 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 SAN 7–8 pm: 1Close ×
WN 4152 SAN 19:35 DEN 22:55 2h 20m 54 42% 1.9% 56 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 2,074 87% 0.7% 66 min
Frontier 705 83% 1.4% 83 min
Alaska (incl. SkyWest) 868 81% 1.5% 54 min
Southwest 2,386 73% 0.8% 56 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 2476 SAN 08:45 DEN 12:17 89%
UA 1337 SAN 10:55 DEN 14:27 89%
UA 519 SAN 18:55 DEN 22:27 88%
F9 2818 SAN 06:25 DEN 10:03 86%
F9 4990 SAN 10:00 DEN 13:37 81%
· · ·
UA 682 SAN 16:07 DEN 19:39 77%
All 22 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 SAN DEN 2h 32m 87% 0.7% 2,074 Flying now
Frontier SAN DEN 2h 36m 83% 1.4% 705 Flying now
Alaska SAN DEN 2h 33m 81% 1.5% 868 Flying now
Southwest SAN DEN 2h 25m 73% 0.8% 2,386 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