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3,685 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 7 in 10.

Best time to leave 8–9 am 97% arrive on time from STL
Best single flight DL 1536 STL 07:08 → ATL 09:45 · 97% on time Avoid F9 4474 STL 17:06 → ATL 20:07 · 61% 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
STL
95
93
97
94
89
82
82
83
77
81
62
79
76
63
65
% 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
Atlanta flights leaving STL 4–5 pm: 1Close ×
WN 3882 STL 16:25 ATL 19:00 1h 35m 50 45% 2.0% 76 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.
Delta (incl. Endeavor) 2,358 90% 2.0% 81 min
Southwest 1,105 81% 1.1% 57 min
Frontier 222 62% 1.8% 100 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.
DL 1536 STL 07:08 ATL 09:45 97%
DL 1524 STL 06:00 ATL 08:38 96%
DL 1571 STL 09:24 ATL 12:02 94%
DL 1400 STL 10:51 ATL 13:25 88%
DL 2700 STL 15:57 ATL 18:37 87%
· · ·
DL 1485 STL 15:13 ATL 17:52 85%
DL 1393 STL 18:58 ATL 21:44 83%
F9 4474 STL 17:06 ATL 20:07 61%
All 15 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.
Delta STL ATL 1h 38m 90% 2.0% 2,358 Flying now
Southwest STL ATL 1h 35m 81% 1.1% 1,105 Flying now
Frontier STL ATL 2h 01m 62% 1.8% 222 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