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5,194 nonstop flights · Aug 2025 – Jul 2026 · US DOT on-time records, all US airlines

Leave before 9 am: 84% depart on time. After 4 pm it’s 64%.

Best time to leave 7–8 am 87% arrive on time from ORD
Best single flight UA 4613 ORD 09:00 → STL 10:34 · 75% on time Avoid UA 4416 ORD 15:59 → STL 17:27 · 63% 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
22
23
ORD
79
90
76
76
79
73
77
84
73
77
72
60
65
61
61
62
63
59
% 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
St Louis flights leaving ORD 5–6 pm: 1Close ×
UA 4412flown by GoJet ORD 17:55 STL 19:23 1h 28m 37 56% 2.7% 80 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 71% 3.4% 74 min
United (incl. GoJet, SkyWest, Republic) 3,080 70% 2.9% 99 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 4613flown by GoJet ORD 09:00 STL 10:34 75%
UA 4518flown by GoJet ORD 16:45 STL 18:13 67%
UA 4416flown by GoJet ORD 15:59 STL 17:27 63%
All 20 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 ORD STL 1h 24m 71% 3.4% 2,114 Flying now
United ORD STL 1h 28m 70% 2.9% 3,080 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