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

No clear winner: Southwest’s ISP → TPA flights land within a few points of 7 in 10 on time whatever the hour.

Best time to leave 12–1 pm 86% arrive on time from ISP

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).

12
ISP
81
% 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.

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 ISP TPA 3h 10m 71% 3.1% 98 Not flying now

Alternatives with one stop

All connections →
SouthwestDetails → ISP 06:00 → BWI 07:15WN 2141 1h 15m Baltimore BWI 08:30 → TPA 11:00WN 1120 5h 00m 96% 90%
SouthwestDetails → ISP 15:05 → BWI 16:20WN 921 2h 50m Baltimore BWI 19:10 → TPA 21:50WN 1123 6h 45m 93% 64%
SouthwestDetails → ISP 09:10 → BWI 10:25WN 4584 3h 25m Baltimore BWI 13:50 → TPA 16:20WN 1121 7h 10m 100% 62%
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