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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 7–8 am: 1Close ×
DL 1536 STL 07:08 ATL 09:45 1h 37m 267 97% 1.5% 111 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