Sun, Oct 4 has passed, so this is the 12-month record.

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 70-minute layover misses 2% of the time at 12 pm and 1 time in 4 at 6 pm.

Nonstops (seasonal or thin)


American	SJU	DFW	5h 28m	81%	1.8%	705	Flying now
Frontier	SJU	DFW	5h 09m	65%	10.4%	67	Flying now
Spirit	SJU	DFW	5h 32m	77%	3.7%	215	Not flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

Ranked by chance you reach Dallas-Fort Worth on time. Total trip = scheduled departure to arrival, layover included (Dallas-Fort Worth is 1 h behind San Juan). Layovers up to 4 hours. Pick a connection for the details.


United Details →	SJU 01:00 → EWR 05:10UA 2219	1h 30m Newark	EWR 06:40 → DFW 09:24UA 1712	9h 24m	90%	89%
American Details →	SJU 06:00 → MIA 08:55AA 2817	3h 20m Miami	MIA 12:15 → DFW 14:34AA 3290	9h 34m	99%	83%
United Details →	SJU 02:05 → IAH 06:01UA 2495	3h 30m Houston	IAH 09:31 → DFW 10:57UA 2074	9h 52m	100%	81%
Frontier Details →	SJU 03:10 → MCO 06:10F9 1823	2h 30m Orlando	MCO 08:40 → DFW 10:35F9 2885	8h 29m	98%	79%
Delta Details →	SJU 06:00 → ATL 09:50DL 1879	1h 38m Atlanta	ATL 11:28 → DFW 12:50DL 414	7h 50m	99%	79%
United Details →	SJU 07:00 → IAH 10:53UA 1644	1h 12m Houston	IAH 12:05 → DFW 13:34UA 4024 · flown by Mesa	7h 34m	97%	78%
American Details →	SJU 07:25 → CLT 11:15AA 3187	3h 49m Charlotte	CLT 15:04 → DFW 16:58AA 1709	10h 33m	99%	77%
United Details →	SJU 07:20 → IAD 11:21UA 2022	1h 20m Dulles	IAD 12:41 → DFW 15:05UA 1564	8h 45m	98%	77%
Tight connection: often missed
Frontier Details →	SJU 06:44 → PHL 10:48F9 1015	47m Philadelphia	PHL 11:35 → DFW 14:15F9 4161	8h 31m	48%	25%

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

ORD · 1h 12m · leaves 07:40 2%

IAD · 1h 20m · leaves 07:20 2%

MIA · 1h 10m · leaves 06:00 2%

Afternoon and evening

ATL · 1h 00m · leaves 17:56 12%

IAH · 1h 08m · leaves 14:55 14%

EWR · 1h 11m · leaves 13:25 24%

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.


Southwest WN 3717 SJU 05:20 → BWI American AA 2747 BWI 12:00 → DFW Connection details →	2h 30m	10h 07m	98%	92%
Southwest WN 3721 SJU 05:00 → MCO American AA 2124 MCO 11:16 → DFW Connection details →	3h 16m	9h 07m	100%	84%
JetBlue B6 754 SJU 05:32 → FLL American AA 1866 FLL 11:43 → DFW Connection details →	3h 32m	9h 23m	99%	83%

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