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3,676 nonstop flights · Aug 2025 – Jul 2026 · US DOT on-time records, all US airlines

Leave before 9 am: 92% depart on time. After 4 pm it’s 3 in 5.

Best time to leave 6–7 am 96% arrive on time from STL
Best single flight F9 4567 STL 20:08 → DEN 21:44 · 76% 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
15
16
17
18
19
20
21
22
STL
92
96
92
90
85
78
77
77
78
75
62
59
45
50
77
71
58
45
% 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

Pick an hour to see this route’s flights leaving then.

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) 1,210 80% 0.6% 84 min
Frontier 291 76% 0.7% 81 min
Southwest 2,175 75% 0.0% 61 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.
F9 4567 STL 20:08 DEN 21:44 76%

All 12 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.
UA 362 STL 05:10 DEN 06:32 2h 22m 71 91% 1.4% 38 min
WN 3909 STL 05:45 DEN 07:00 2h 15m 58 91% 0.0% 47 min
WN 3910 STL 08:42 DEN 10:02 2h 20m 50 90% 0.0% 32 min
UA 2459 STL 09:06 DEN 10:30 2h 24m 71 92% 0.0% 73 min
WN 4312 STL 11:30 DEN 12:40 2h 10m 50 72% 0.0% 39 min
UA 1380 STL 13:38 DEN 15:00 2h 22m 130 86% 0.8% 59 min
WN 824 STL 14:05 DEN 15:20 2h 15m 50 60% 0.0% 82 min
WN 3912 STL 16:00 DEN 17:20 2h 20m 58 51% 0.0% 71 min
UA 1483 STL 16:48 DEN 18:23 2h 35m 71 56% 0.0% 126 min
WN 3913 STL 18:40 DEN 20:00 2h 20m 50 47% 0.0% 67 min
F9 4567 STL 20:08 DEN 21:44 2h 36m 269 76% 0.7% 81 min
WN 3914 STL 22:35 DEN 23:18 2h 20m 42 60% 0.0% 67 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.
United STL DEN 2h 33m 80% 0.6% 1,210 Flying now
Frontier STL DEN 2h 36m 76% 0.7% 291 Flying now
Southwest STL DEN 2h 20m 75% 0.0% 2,175 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