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 83% on time.

Nonstops (seasonal or thin)


Delta	JFK	ACK	1h 29m	86%	5.5%	110	Flying now
JetBlue	JFK	ACK	1h 27m	81%	7.9%	191	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

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


JetBlue Details →	JFK 06:29 → BOS 07:46B6 2718	1h 44m Boston	BOS 09:30 → ACK 10:24B6 2352	3h 53m	95%	72%
American Details →	JFK 09:23 → DCA 10:59AA 4671 · flown by Republic	4h 00m Washington	DCA 14:59 → ACK 16:40AA 4553 · flown by Republic	7h 17m	100%	61%

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.


American AA 4376 JFK 08:24 → BOS JetBlue B6 1352 BOS 12:12 → ACK Connection details →	2h 24m	4h 39m	96%	77%
Delta DL 5765 JFK 06:00 → BOS American AA 4708 BOS 09:35 → ACK Connection details →	2h 11m	4h 49m	95%	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