Nantucket Memorial (ACK) – Philadelphia (PHL)
In July 2026, 118 flights operated between Nantucket Memorial and Philadelphia (both directions), and 84.7% left on time, according to the US BTS.
- Flights operated · latest month118▲ 84.4%vs July 2025
- On-time departures81.2%Average delay 12.2 min
- Cancelled5.0%17 of 342 scheduled flights
- Airlines1
- Rank in country#2,811
Flights per month
Short series — ACK–PHL has only 6 months so far. Enough to show the level now, not enough to read a trend.
Only complete months are shown. A month appears once the source has published every day of it.
The most recent periods6 periods
| Period | Flights operated 2025 | Flights operated 2026 | Change vs last year |
|---|---|---|---|
| January | – | – | – |
| February | – | – | – |
| March | – | – | – |
| April | – | – | – |
| May | – | – | – |
| June | 24 | 52 | ▲ 116.7% |
| July | 64 | 118 | ▲ 84.4% |
| August | 63 | – | – |
| September | 4 | – | – |
| October | – | – | in progress |
| November | – | – | – |
| December | – | – | – |
On-time departures by month
Short series — ACK–PHL has only 6 months so far. Enough to show the level now, not enough to read a trend.
Departures within 15 minutes of schedule.
The most recent periods6 periods
| Period | On-time departures 2025 | On-time departures 2026 | Change vs last year |
|---|---|---|---|
| January | – | – | – |
| February | – | – | – |
| March | – | – | – |
| April | – | – | – |
| May | – | – | – |
| June | 79.2% | 84.6% | ▲ 6.8% |
| July | 82.8% | 84.7% | ▲ 2.3% |
| August | 69.8% | – | – |
| September | 100.0% | – | – |
| October | – | – | in progress |
| November | – | – | – |
| December | – | – | – |
Cancelled flights by month
Short series — ACK–PHL has only 6 months so far. Enough to show the level now, not enough to read a trend.
The most recent periods6 periods
| Period | Cancelled flights 2025 | Cancelled flights 2026 | Change vs last year |
|---|---|---|---|
| January | – | – | – |
| February | – | – | – |
| March | – | – | – |
| April | – | – | – |
| May | – | – | – |
| June | 4 | 0 | ▼ 100.0% |
| July | 6 | 6 | 0.0% |
| August | 1 | – | – |
| September | 0 | – | – |
| October | – | – | in progress |
| November | – | – | – |
| December | – | – | – |
By direction
ACK → PHL
- Scheduled flights
- 171
- Flights operated
- 157
- Cancelled
- 14 · 8.2%
- On-time departures
- 77.7%
PHL → ACK
- Scheduled flights
- 171
- Flights operated
- 168
- Cancelled
- 3 · 1.8%
- On-time departures
- 84.5%
ACK → PHL and PHL → ACK counted separately.
Airlines on this route
Jun 1, 2025 – Jul 31, 2026| Airline | Scheduled flights | Share | On-time departures | Cancelled |
|---|---|---|---|---|
| Republic Airways YX | 342 | 100.0% | 81.2% | 17 |
Shares are of scheduled flights in the period shown. Codeshare flights are counted once, under the operating airline.
Flight timing & delays
Historical departures, grouped by the scheduled local time at the departure airport. These are recorded outcomes, not a forecast for your flight.
Times are local to the departure airport of each flight; both directions are combined.
Source: the US BTS · Jun 19, 2025 → Jul 31, 2026
Departure hour
Hover, tap or focus a point to see its value, sample and source.
No bucket in this view has 200 measured departures yet. Flight counts are shown; on-time and delay charts become available when the sample is large enough.
View the figures
| Departure hour | On-time departures | Average departure delay | With departure time | Recorded flights |
|---|---|---|---|---|
| 00:00 | No observations | — | — | — |
| 01:00 | No observations | — | — | — |
| 02:00 | No observations | — | — | — |
| 03:00 | No observations | — | — | — |
| 04:00 | No observations | — | — | — |
| 05:00 | No observations | — | — | — |
| 06:00 | No observations | — | — | — |
| 07:00 | No observations | — | — | — |
| 08:00 | No observations | — | — | — |
| 09:00 | No observations | — | — | — |
| 10:00 | Fewer than 200 measured departures | — | 49 | 49 |
| 11:00 | Fewer than 200 measured departures | — | 2 | 2 |
| 12:00 | Fewer than 200 measured departures | — | 45 | 45 |
| 13:00 | Fewer than 200 measured departures | — | 58 | 60 |
| 14:00 | Fewer than 200 measured departures | — | 65 | 66 |
| 15:00 | Fewer than 200 measured departures | — | 47 | 54 |
| 16:00 | Fewer than 200 measured departures | — | 59 | 66 |
| 17:00 | No observations | — | — | — |
| 18:00 | No observations | — | — | — |
| 19:00 | No observations | — | — | — |
| 20:00 | No observations | — | — | — |
| 21:00 | No observations | — | — | — |
| 22:00 | No observations | — | — | — |
| 23:00 | No observations | — | — | — |
Day of week
Hover, tap or focus a point to see its value, sample and source.
No bucket in this view has 200 measured departures yet. Flight counts are shown; on-time and delay charts become available when the sample is large enough.
View the figures
| Day of week | On-time departures | Average departure delay | With departure time | Recorded flights |
|---|---|---|---|---|
| Monday | Fewer than 200 measured departures | — | 43 | 46 |
| Tuesday | Fewer than 200 measured departures | — | 40 | 46 |
| Wednesday | Fewer than 200 measured departures | — | 42 | 44 |
| Thursday | Fewer than 200 measured departures | — | 47 | 50 |
| Friday | Fewer than 200 measured departures | — | 50 | 50 |
| Saturday | Fewer than 200 measured departures | — | 44 | 46 |
| Sunday | Fewer than 200 measured departures | — | 59 | 60 |
Month of year
Months combine the same calendar month across the years shown; this is a seasonal pattern, not a monthly time series.
Hover, tap or focus a point to see its value, sample and source.
No bucket in this view has 200 measured departures yet. Flight counts are shown; on-time and delay charts become available when the sample is large enough.
View the figures
| Month of year | On-time departures | Average departure delay | With departure time | Recorded flights |
|---|---|---|---|---|
| Jan | No observations | — | — | — |
| Feb | No observations | — | — | — |
| Mar | No observations | — | — | — |
| Apr | No observations | — | — | — |
| May | No observations | — | — | — |
| Jun | Fewer than 200 measured departures | — | 76 | 80 |
| Jul | Fewer than 200 measured departures | — | 182 | 194 |
| Aug | Fewer than 200 measured departures | — | 63 | 64 |
| Sep | Fewer than 200 measured departures | — | 4 | 4 |
| Oct | No observations | — | — | — |
| Nov | No observations | — | — | — |
| Dec | No observations | — | — | — |
Delay and on-time rates need at least 200 measured departures per bucket. Smaller samples remain visible in the flight-count chart. An empty slot means no observations, not zero flights.
Recorded outcomes
- On time 77.2% 264
- Delayed >15 min 17.8% 61
- Cancelled 5.0% 17
- Missing departure time 0.0% 0
All recorded flights with a known scheduled local time, counted once. Missing actual times are shown separately.
On time means departing no more than 15 minutes after schedule. Cancelled flights and flights missing departure times are excluded from the on-time rate and average delay.
Flight numbers on this route
6| Flight numbers | By direction | Departures | On time |
|---|---|---|---|
| YX4518 | PHL → ACK | 76 | 78.7% |
| YX4518 | ACK → PHL | 76 | 74.2% |
| YX4545 | ACK → PHL | 44 | 70.0% |
| YX4545 | PHL → ACK | 44 | 85.7% |
| YX4735 | PHL → ACK | 44 | 93.2% |
| YX4735 | ACK → PHL | 44 | 88.6% |
Flight numbers are the codes sold on tickets. On shared flights one aircraft can carry several of them. Only numbers with at least 30 flights have a page.
Monthly figures
| Period | Flights operated | Change vs last year | Cancelled | On-time departures |
|---|---|---|---|---|
| July 2026 | 118 | +84.4% | 6 | 84.7% |
| June 2026 | 52 | +116.7% | 0 | 84.6% |
| September 2025 | 4 | 0 | 100.0% | |
| August 2025 | 63 | 1 | 69.8% | |
| July 2025 | 64 | 6 | 82.8% | |
| June 2025 | 24 | 4 | 79.2% |