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

Connect in the morning. The same one-hour layover misses 2% of the time at 10 am and 15% of the time at 10 pm.

Nonstops


American	SJU	MIA	2h 58m	79%	0.7%	2,110	Flying now
Frontier	SJU	MIA	2h 58m	78%	1.8%	379	Flying now
Spirit	SJU	MIA	2h 50m	73%	2.6%	154	Not flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

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


United Details →	SJU 01:00 → EWR 05:10UA 2219	1h 50m Newark	EWR 07:00 → MIA 10:02UA 2785	9h 02m	92%	85%
United Details →	SJU 02:05 → IAH 06:01UA 2495	1h 24m Houston	IAH 07:25 → MIA 11:12UA 1966	9h 07m	96%	84%
United Details →	SJU 07:00 → IAH 10:53UA 1644	1h 07m Houston	IAH 12:00 → MIA 15:47UA 410	8h 47m	97%	81%
American Details →	SJU 00:59 → ORD 05:04AA 2592	1h 06m Chicago	ORD 06:10 → MIA 10:22AA 1380	9h 23m	93%	81%
American Details →	SJU 00:58 → DFW 05:00AA 2742	2h 10m Dallas-Fort Worth	DFW 07:10 → MIA 11:11AA 3290	10h 13m	99%	79%
Southwest Details →	SJU 05:20 → BWI 09:30WN 3717	2h 15m Baltimore	BWI 11:45 → MIA 14:20WN 4737	9h 00m	98%	79%
Delta Details →	SJU 06:00 → ATL 09:50DL 1879	1h 10m Atlanta	ATL 11:00 → MIA 13:04DL 1332	7h 04m	98%	78%
Delta Details →	SJU 07:30 → ATL 11:20DL 1763	1h 34m Atlanta	ATL 12:54 → MIA 14:55DL 1579	7h 25m	98%	73%

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 10m · leaves 06:00 2%

IAH · 1h 07m · leaves 07:00 3%

ORD · 1h 06m · leaves 00:59 7%

Afternoon and evening

PHL · 1h 17m · leaves 14:25 15%

ATL · 55m · leaves 17:56 15%

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 234 SJU 02:20 → MCO American AA 2593 MCO 08:35 → MIA Connection details →	3h 16m	7h 29m	97%	91%
Southwest WN 3721 SJU 05:00 → MCO American AA 2240 MCO 10:00 → MIA Connection details →	2h 00m	6h 15m	98%	86%
United UA 2219 SJU 01:00 → EWR American AA 1152 EWR 08:00 → MIA Connection details →	2h 50m	10h 10m	93%	84%

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