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 7 am and 15% of the time at 4 pm.

Nonstops


JetBlue	EWR	SJU	4h 01m	76%	4.0%	656	Flying now
United	EWR	SJU	4h 04m	71%	2.2%	1,113	Flying now
Spirit	EWR	SJU	4h 00m	70%	4.5%	133	Not flying now
Frontier	EWR	SJU	3h 58m	57%	3.3%	183	Not flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

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


American Details →	EWR 05:31 → MIA 08:45AA 1196	2h 32m Miami	MIA 11:17 → SJU 14:12AA 2584	8h 41m	99%	87%
United Details →	EWR 10:53 → IAH 13:38UA 556	1h 25m Houston	IAH 15:03 → SJU 20:38UA 701	9h 45m	92%	82%
JetBlue Details →	EWR 06:00 → MCO 08:48B6 927	2h 14m Orlando	MCO 11:02 → SJU 14:04B6 133	8h 04m	98%	82%
American Details →	EWR 06:00 → CLT 08:01AA 2505	3h 02m Charlotte	CLT 11:03 → SJU 14:50AA 783	8h 50m	98%	81%
United Details →	EWR 06:00 → IAD 07:22UA 1366	1h 12m Dulles	IAD 08:34 → SJU 12:34UA 2021	6h 34m	98%	80%
United Details →	EWR 06:30 → DEN 08:45UA 670	58m Denver	DEN 09:43 → SJU 17:38UA 1339	11h 08m	95%	79%
American Details →	EWR 08:00 → MIA 11:10AA 1152	1h 53m Miami	MIA 13:03 → SJU 15:47AA 2581	7h 47m	98%	79%
Delta Details →	EWR 07:05 → ATL 09:22DL 1673	3h 44m Atlanta	ATL 13:06 → SJU 16:46DL 1946	9h 41m	99%	79%
Tight connection: often missed
United Details →	EWR 15:08 → IAD 16:32UA 1992	52m Dulles	IAD 17:24 → SJU 21:24UA 2025	6h 16m	58%	41%
Delta Details →	EWR 15:25 → ATL 17:54DL 2312	51m Atlanta	ATL 18:45 → SJU 22:29DL 1861	7h 04m	63%	40%

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

IAD · 1h 12m · leaves 06:00 2%

DEN · 58m · leaves 06:30 5%

ORD · 1h 07m · leaves 06:00 7%

Afternoon and evening

ATL · 51m · leaves 15:25 37%

IAD · 52m · leaves 15:08 42%

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.


United UA 788 EWR 06:30 → MCO Southwest WN 1465 MCO 12:10 → SJU Connection details →	2h 54m	8h 35m	100%	85%
United UA 2785 EWR 07:00 → MIA American AA 2581 MIA 13:03 → SJU Connection details →	3h 01m	8h 47m	98%	78%
United UA 2719 EWR 07:47 → MCO Frontier F9 1824 MCO 13:57 → SJU Connection details →	3h 23m	9h 13m	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