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

No clear winner: airlines and hours on this route all land within a few points of 4 in 5 on time.

Nonstops


Southwest	SJU	BWI	4h 15m	82%	1.0%	818	Flying now
Frontier	SJU	BWI	4h 14m	74%	5.3%	171	Flying now
Spirit	SJU	BWI	4h 00m	74%	6.9%	173	Not flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

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


Delta Details →	SJU 06:00 → ATL 09:50DL 1879	1h 20m Atlanta	ATL 11:10 → BWI 13:03DL 2711	7h 03m	98%	85%
Southwest Details →	SJU 05:00 → MCO 08:00WN 3721	1h 15m Orlando	MCO 09:15 → BWI 11:30WN 2612	6h 30m	98%	84%
Southwest Details →	SJU 06:30 → TPA 09:35WN 3730	1h 05m Tampa	TPA 10:40 → BWI 13:00WN 1016	6h 30m	95%	84%
Southwest Details →	SJU 06:25 → MCO 09:30WN 3722	1h 25m Orlando	MCO 10:55 → BWI 13:10WN 193	6h 45m	100%	83%
Southwest Details →	SJU 18:30 → MCO 21:30WN 4613	1h 25m Orlando	MCO 22:55 → BWI 01:15 +1WN 160	6h 45m	80%	63%
Delta Details →	SJU 17:56 → ATL 21:54DL 1946	51m Atlanta	ATL 22:45 → BWI 00:40 +1DL 2590	6h 44m	82%	62%
American Details →	SJU 11:54 → MIA 14:43AA 2582	1h 01m Miami	MIA 15:44 → BWI 18:26AA 1634	6h 32m	89%	57%
Delta Details →	SJU 14:41 → ATL 18:37DL 1882	53m Atlanta	ATL 19:30 → BWI 21:25DL 1257	6h 44m	83%	57%
Tight connection: often missed
Southwest Details →	SJU 13:15 → MCO 16:25WN 4959	53m Orlando	MCO 17:18 → BWI 19:52WN 889	6h 38m	68%	35%
Frontier Details →	SJU 08:50 → CLT 12:51F9 3003	47m Charlotte	CLT 13:38 → BWI 15:17F9 3076	6h 27m	47%	34%

Same layover, different day-part

How often the first flight arrives too late to connect (45 min minimum), for one-ticket layovers of 45–80 minutes.

Morning

ATL · 1h 20m · leaves 06:00 2%

MCO · 1h 15m · leaves 05:00 2%

TPA · 1h 05m · leaves 06:30 5%

Afternoon and evening

ATL · 51m · leaves 17:56 18%

MCO · 53m · leaves 13:15 32%

Delays build through the day, so an afternoon first leg eats the layover. A short connection is fine early in the morning and a gamble later on.

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.


JetBlue B6 452 SJU 06:00 → TPA Southwest WN 1016 TPA 10:40 → BWI Connection details →	1h 41m	7h 00m	97%	85%
Frontier F9 1823 SJU 03:10 → MCO Southwest WN 2611 MCO 08:40 → BWI Connection details →	2h 30m	7h 45m	94%	84%
JetBlue B6 234 SJU 02:20 → MCO Southwest WN 1956 MCO 07:10 → BWI Connection details →	1h 51m	7h 05m	85%	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