Itineraries flown on 20+ days in the Jun 6 – Jul 31, 2026 schedule · each leg’s record Aug 2025 – Jul 2026

No clear winner: Southwest’s BWI → ISP flights land within a few points of 4 in 5 on time whatever the hour.

Nonstops


Southwest	BWI	ISP	1h 10m	79%	1.9%	1,236	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

Ranked by chance you reach Islip on time. Total trip = scheduled departure to arrival, layover included. Layovers up to 4 hours. Pick a connection for the details.


Southwest Details →	BWI 08:15 → PBI 10:50WN 1041	3h 55m West Palm Beach	PBI 14:45 → ISP 17:25WN 3192	9h 10m	100%	79%
Frontier Details →	BWI 11:27 → TPA 13:56F9 1537	2h 13m Tampa	TPA 16:09 → ISP 19:01F9 3324	7h 34m	96%	72%
JetBlue Details →	BWI 06:09 → FLL 08:50B6 1795	2h 48m Fort Lauderdale	FLL 11:38 → ISP 14:28B6 514	8h 19m	95%	67%
Southwest Details →	BWI 16:30 → MCO 19:00WN 176	1h 55m Orlando	MCO 20:55 → ISP 22:55WN 4840	7h 10m	82%	48%

Mixing airlines

One ticketMiss it and the airline rebooks you; bags go through. 45 min is enough.

Separate ticketsMiss it and you buy a new ticket. Re-check bags, clear security again: we require 90 min.


Southwest WN 986 BWI 08:05 → MCO Frontier F9 3942 MCO 13:08 → ISP Connection details →	2h 48m	7h 51m	100%	81%
Southwest WN 1041 BWI 08:15 → PBI JetBlue B6 544 PBI 13:00 → ISP Connection details →	2h 10m	7h 32m	96%	77%
Southwest WN 2997 BWI 08:20 → MYR Frontier F9 1682 MYR 12:44 → ISP Connection details →	2h 49m	6h 10m	100%	76%

Rank all connections, any airlines →

Regional partners count as the airline that sells them: SkyWest flying Delta Connection is one Delta ticket.

How these are worked out. Makes the connection: share of the last year’s flights where the first flight arrived with at least 45 minutes to spare (90 on separate tickets). Arrives on time: first flight not cancelled × connection made × second flight not cancelled and arriving within 15 minutes. Not yet counted: the second flight also leaving late (which helps), gate-to-gate distance at the hub, and rebooking after a missed connection.

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