ACK to LGA flight delays
Nantucket, MA (ACK) New York, NY (LGA) · 202 miles
419 flights · January 2025 – August 2026 · US Bureau of Transportation Statistics
77.56%
Arrived on time
Within 15 minutes of schedule
4.06%
Cancelled
Share of scheduled flights
86 min
When late, late by
Average across delayed arrivals
20 min
Delay per flight
Averaged over every flight flown
What the record says about this route
Which airline you fly changes the odds here. JetBlue Airways arrived on time 10.8 points more often than Republic Airways over the same period on the same route — same airports, same weather, same air traffic control. A gap that survives all of that is about how the two airlines are run.
Cancellation, not delay, is the risk worth pricing here: 4.06% of scheduled flights never operated. A late flight still gets you there. A cancelled one leaves you rebooking, and on a route with few daily departures that can mean losing a day.
The two directions do not behave alike. LGA to ACK arrives on time 6.2 points more often than the outbound. Delay accumulates through the flying day, so whichever direction is scheduled later tends to carry the worse record — which is an argument for booking the morning departure if the choice exists.
This is a thin route — 419 flights across the whole period. On a route this infrequent a cancellation is far more costly than the rate suggests, because the next departure may not be the same day.
Which airline should you fly on this route?
Over January 2025 – August 2026, JetBlue Airways arrived on time most often on ACK to LGA. Republic Airways was late most often. Flights ran closest to schedule in August and worst in May.
Every airline on ACK to LGA
Ranked by how many flights each one operated. A carrier with fewer than 100 flights in the period is listed but not graded.
| Airline | Flights | On time | Cancelled | Avg delay | Grade |
|---|---|---|---|---|---|
| Republic Airways | 319 | 74.92% | 4.7% | 86 min | D |
| JetBlue Airways | 100 | 85.71% | 2% | 88 min | B |
Month by month
Share of flights that arrived within 15 minutes of schedule, by month flown.
The return leg
LGA to ACK New York back to Nantucket 83.74% on time BOther routes from Nantucket
Common questions
Are flights from Nantucket to New York usually delayed?
77.56% of flights on the ACK to LGA route arrived within 15 minutes of schedule, so roughly 2 in every ten arrived late. That is about the same as the average route in this record.
Which airline is most on time from Nantucket to New York?
JetBlue Airways, at 85.71% on time across 100 flights. The least punctual on the route was Republic Airways at 74.92%.
How often are ACK to LGA flights cancelled?
4.06% of scheduled flights did not operate — about 41 in every thousand. That is high enough that cancellation, not delay, is the risk worth planning around.
When ACK to LGA flights are late, how late are they?
About 86 minutes on average across the flights that arrived more than 15 minutes behind schedule.
What these figures do and do not tell you
Everything on this page is counted from the flights that actually operated on ACK to LGA during January 2025 – August 2026, as reported by the airlines to the US Bureau of Transportation Statistics. "On time" is the federal definition: arriving at the gate within 15 minutes of the scheduled time.
A route's record is a description of the past, not a forecast. Weather, air traffic control and the aircraft's earlier flights that day drive most delays, and none of them are predictable from a historical rate. What the record does tell you is whether this route runs late more often than others, and which carrier on it has the better history — which is the part you can actually act on when you book.
Cancellations are counted separately from delays because they are a different problem for a traveller: a late flight still gets you there. How the grade is calculated →