ACK to PHL flight delays
Nantucket, MA (ACK) Philadelphia, PA (PHL) · 288 miles
95 flights · January 2025 – August 2026 · US Bureau of Transportation Statistics
55.68%
Arrived on time
Within 15 minutes of schedule
7.37%
Cancelled
Share of scheduled flights
55 min
When late, late by
Average across delayed arrivals
25 min
Delay per flight
Averaged over every flight flown
What the record says about this route
Cancellation, not delay, is the risk worth pricing here: 7.37% 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.
This is a late route. Flights from Nantucket to Philadelphia miss their scheduled arrival often enough that a tight connection at the far end is a connection at risk.
The two directions do not behave alike. PHL to ACK arrives on time 23.3 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 route does worse than its own airport. ACK as a whole runs 22 points more punctual than these flights, which points at something specific to the route — the time of day it is scheduled, or the aircraft that feed it — rather than the airport.
Every airline on ACK to PHL
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 | 95 | 55.68% | 7.37% | 55 min | — |
Month by month
Share of flights that arrived within 15 minutes of schedule, by month flown.
The return leg
PHL to ACK Philadelphia back to Nantucket 78.95% on time —Other routes from Nantucket
Common questions
Are flights from Nantucket to Philadelphia usually delayed?
55.68% of flights on the ACK to PHL route arrived within 15 minutes of schedule, so roughly 4 in every ten arrived late. That is worse than the average route in this record.
How often are ACK to PHL flights cancelled?
7.37% of scheduled flights did not operate — about 74 in every thousand. That is high enough that cancellation, not delay, is the risk worth planning around.
When ACK to PHL flights are late, how late are they?
About 55 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 PHL 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 →