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 82% on time.

Nonstops (seasonal or thin)


American	LGA	ACK	1h 23m	86%	5.0%	100	Flying now
Delta	LGA	ACK	1h 20m	81%	2.3%	220	Flying now
JetBlue	LGA	ACK	1h 13m	81%	4.3%	92	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.


American Details →	LGA 06:00 → BOS 07:20AA 4377 · flown by Republic	2h 15m Boston	BOS 09:35 → ACK 10:49AA 4708 · flown by Republic	4h 49m	98%	79%
American Details →	LGA 10:47 → DCA 12:17AA 4654 · flown by Republic	2h 42m Washington	DCA 14:59 → ACK 16:40AA 4553 · flown by Republic	5h 53m	100%	61%
Tight connection: often missed
American Details →	LGA 06:15 → DCA 07:44AA 4612 · flown by Republic	46m Washington	DCA 08:30 → ACK 10:09AA 4543 · flown by Republic	3h 55m	73%	60%

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

DCA · 46m · leaves 06:15 27%

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.


American AA 4377 LGA 06:00 → BOS JetBlue B6 2352 BOS 09:30 → ACK Connection details →	2h 10m	4h 22m	98%	78%
Delta DL 5852 LGA 06:00 → BOS American AA 4708 BOS 09:35 → ACK Connection details →	2h 20m	4h 49m	98%	77%
Delta DL 5793 LGA 06:59 → BOS JetBlue B6 1352 BOS 12:12 → ACK Connection details →	3h 50m	6h 04m	100%	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