Nantucket to New York

What the Data Says About ACK to LGA

The Nantucket to New York corridor (ACK → LGA) covers roughly 202 miles and is served by 8 carriers, based on Bureau of Transportation Statistics reporting. Across 1,973 flights in the dataset, this route posts a 77.4% on-time rate with an average delay of 111.2 minutes when flights run late. Over the most recent 24 months of BTS data, 1,903 flights were recorded on this pairing — 123 cancelled (6.5%) and 2 diverted (0.1%). Those baseline metrics tell you what to expect before you book.

Having 8 carriers on the route matters: more carriers generally means more daily schedule options, competitive pricing, and redundancy when flights are cancelled. With 1,973 total flights analyzed, the 77.4% on-time figure is statistically meaningful rather than a small-sample fluke. The 111.2-minute average delay applies only to flights that actually ran late, so it is not the average wait across all departures — the majority of flights on this route depart on time under the BTS definition of a delay (15+ minutes past schedule).

Looking at recent months, Aug 2025 posted the best performance on this corridor at 88% on-time, while Jul 2023 came in at 68% on-time — a 20-point gap between best and worst recent month. For travelers evaluating the ACK to LGA route, the combination of a 77.4% on-time rate, 111.2-minute average delay, 6.5% recent cancellation rate, and 8 available carriers is the concrete summary of what BTS data shows about reliability on this pairing.