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Showing Southwest only (incl. its regional partners)All airlines ×
1,105 nonstop flights · Aug 2025 – Jul 2026 · US DOT on-time records, all US airlines

Leave before 9 am: 93% depart on time. After 4 pm it’s 56%.

Best time to leave 6–7 am 96% arrive on time from ATL

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
ATL
95
88
95
79
82
65
70
67
80
61
39
% 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

Pick an hour to see this route’s flights leaving then.

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.

No Southwest flight on this route ran 150+ times in the year.

All 5 Southwest flights in the current schedule

Every flight that flew in the Jun 6 – Jul 31, 2026 schedule, with its record over Aug 2025 – Jul 2026. Times are local. Click a column to sort.
WN 3937 ATL 06:50 STL 07:30 1h 40m 48 96% 0.0% 20 min
WN 240 ATL 13:10 STL 13:50 1h 40m 34 76% 0.0% 82 min
WN 225 ATL 14:10 STL 14:50 1h 40m 16 75% 0.0% 97 min
WN 266 ATL 19:40 STL 20:28 1h 48m 16 75% 0.0% 40 min
WN 241 ATL 20:20 STL 21:00 1h 40m 34 15% 0.0% 60 min

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.
Southwest ATL STL 1h 45m 80% 0.4% 1,105 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