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 7 in 10 on time.

Nonstops (seasonal or thin)


Frontier	SJU	BDL	4h 11m	74%	1.3%	240	Flying now
JetBlue	SJU	BDL	3h 57m	69%	2.6%	726	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

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


United Details →	SJU 07:20 → IAD 11:21UA 2022	1h 19m Dulles	IAD 12:40 → BDL 14:06UA 632	6h 46m	98%	87%
Southwest Details →	SJU 05:20 → BWI 09:30WN 3717	1h 15m Baltimore	BWI 10:45 → BDL 12:05WN 427	6h 45m	98%	85%
American Details →	SJU 07:00 → PHL 11:04AA 3063	1h 47m Philadelphia	PHL 12:51 → BDL 14:11AA 6035 · flown by Piedmont	7h 11m	96%	77%
United Details →	SJU 16:55 → IAD 20:56UA 2024	1h 29m Dulles	IAD 22:25 → BDL 23:59UA 444	7h 04m	94%	77%
Southwest Details →	SJU 17:15 → BWI 21:25WN 3719	1h 30m Baltimore	BWI 22:55 → BDL 00:20 +1WN 1879	7h 02m	96%	63%
American Details →	SJU 16:38 → MIA 19:34AA 2581	1h 10m Miami	MIA 20:44 → BDL 23:55AA 1272	7h 17m	81%	57%
American Details →	SJU 15:40 → CLT 19:39AA 783	1h 22m Charlotte	CLT 21:01 → BDL 23:00AA 2763	7h 20m	92%	48%
American Details →	SJU 14:25 → PHL 18:38AA 903	1h 06m Philadelphia	PHL 19:44 → BDL 21:22AA 6107 · flown by Piedmont	6h 57m	81%	45%
Tight connection: often missed
JetBlue Details →	SJU 16:36 → FLL 19:15B6 1454	1h 00m Fort Lauderdale	FLL 20:15 → BDL 23:20B6 460	6h 44m	70%	43%
JetBlue Details →	SJU 09:52 → FLL 12:30B6 2154	55m Fort Lauderdale	FLL 13:25 → BDL 16:27B6 760	6h 35m	68%	37%

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

BWI · 1h 15m · leaves 05:20 2%

IAD · 1h 19m · leaves 07:20 2%

Afternoon and evening

PHL · 1h 06m · leaves 14:25 19%

MIA · 1h 10m · leaves 16:38 19%

FLL · 1h 00m · leaves 16:36 30%

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 1048 SJU 07:00 → PHL American AA 6035 PHL 12:51 → BDL Connection details →	1h 50m	7h 11m	94%	77%

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