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5,191 nonstop flights · Aug 2025 – Jul 2026 · US DOT on-time records, all US airlines

Leave before 9 am: 87% depart on time. After 4 pm it’s 7 in 10.

Best time to leave 5–6 am 92% arrive on time from STL
Best single flight UA 4423 STL 07:20 → ORD 09:00 · 86% on time Avoid UA 4395 STL 11:25 → ORD 13:03 · 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
15
16
17
18
19
20
STL
89
87
89
84
79
75
74
71
69
74
76
64
78
72
66
61
% 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
Chicago flights leaving STL 7–8 pm: 2Close ×
UA 4411flown by GoJet STL 19:05 ORD 20:35 1h 30m 32 62% 9.4% 73 min
UA 4165flown by GoJet STL 19:05 ORD 20:39 1h 34m 35 70% 5.7% 90 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.
American (incl. Envoy, SkyWest, Republic) 2,114 74% 3.7% 108 min
United (incl. GoJet, SkyWest, Republic) 3,077 72% 2.8% 95 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 4423flown by GoJet STL 07:20 ORD 09:00 86%
UA 4183flown by GoJet STL 08:00 ORD 09:35 72%
UA 4395flown by GoJet STL 11:25 ORD 13:03 71%
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.
American STL ORD 1h 29m 74% 3.7% 2,114 Flying now
United STL ORD 1h 30m 72% 2.8% 3,077 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