LGA to ACK flight delays
New York, NY (LGA) Nantucket, MA (ACK) · 202 miles
419 flights · January 2025 – August 2026 · US Bureau of Transportation Statistics
83.74%
Arrived on time
Within 15 minutes of schedule
1.43%
Cancelled
Share of scheduled flights
62 min
When late, late by
Average across delayed arrivals
11 min
Delay per flight
Averaged over every flight flown
What the record says about this route
The two directions do not behave alike. ACK to LGA arrives on time 6.2 points less 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 route does better than its own airport. Departures from LGA overall run 7.4 points less punctual than this particular one — so whatever congestion LGA has, this route is largely escaping it.
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.
Flights from New York to Nantucket keep to schedule more reliably than most. On a route this punctual the day you fly matters more than the airline you pick.
Which airline should you fly on this route?
Over January 2025 – August 2026, Republic Airways arrived on time most often on LGA to ACK. JetBlue Airways was late most often. Flights ran closest to schedule in August and worst in October.
Every airline on LGA to ACK
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 | 84.08% | 1.25% | 59 min | B |
| JetBlue Airways | 100 | 82.65% | 2% | 72 min | C |
Month by month
Share of flights that arrived within 15 minutes of schedule, by month flown.
The return leg
ACK to LGA Nantucket back to New York 77.56% on time DOther routes from New York
Common questions
Are flights from New York to Nantucket usually delayed?
83.74% of flights on the LGA to ACK route arrived within 15 minutes of schedule, so roughly 2 in every ten arrived late. That is better than the average route in this record.
Which airline is most on time from New York to Nantucket?
Republic Airways, at 84.08% on time across 319 flights. The least punctual on the route was JetBlue Airways at 82.65%.
How often are LGA to ACK flights cancelled?
1.43% of scheduled flights did not operate — about 14 in every thousand. That is in the normal range.
When LGA to ACK flights are late, how late are they?
About 62 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 LGA to ACK 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 →