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

Take the nonstop: Southwest STL → JAX (1h 55m) reaches Jacksonville on time 4 times in 5; the most reliable connection, Southwest via Nashville (3h 50m), 37%.

Best time to leave 7–8 am 98% arrive on time from STL

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).

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STL
96
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75
66
77
% 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 2 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 3771 STL 10:15 JAX 13:15 2h 00m 16 94% 0.0% 45 min
WN 3933 STL 15:35 JAX 18:35 2h 00m 34 71% 0.0% 50 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 STL JAX 1h 55m 79% 0.2% 507 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