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3,685 nonstop flights · Aug 2025 – Jul 2026 · US DOT on-time records, all US airlines

Leave before 9 am: 9 in 10 depart on time. After 4 pm it’s 72%.

Best time to leave 6–7 am 93% arrive on time from ATL
Best single flight DL 1571 ATL 07:43 → STL 08:19 · 92% on time Avoid F9 4473 ATL 08:05 → STL 08:57 · 69% 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
ATL
91
92
90
87
86
89
70
83
80
87
66
76
78
63
59
79
90
80
% 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 ATL 4–5 pm: 1Close ×
DL 543 ATL 16:05 STL 16:48 1h 43m 37 81% 2.7% 53 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 2,357 85% 2.0% 58 min
Southwest 1,105 80% 0.4% 59 min
Frontier 223 69% 1.8% 53 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 1571 ATL 07:43 STL 08:19 92%
DL 2700 ATL 14:09 STL 14:48 90%
DL 1485 ATL 13:40 STL 14:18 88%
DL 1400 ATL 09:04 STL 09:43 87%
DL 1403 ATL 23:10 STL 23:53 83%
· · ·
DL 1393 ATL 17:13 STL 17:56 79%
DL 2833 ATL 21:33 STL 22:15 76%
F9 4473 ATL 08:05 STL 08:57 69%
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 ATL STL 1h 42m 85% 2.0% 2,357 Flying now
Southwest ATL STL 1h 45m 80% 0.4% 1,105 Flying now
Frontier ATL STL 1h 50m 69% 1.8% 223 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