YX4503
YX4503 (Republic Airways) is a multi-stop service on 19 routes, busiest New York to Boston. Of 677 departures recorded from October 2024 to July 2026, 74.2% left on time, according to the US BTS.
- On-time departures74.2%of 677 flights
- Average delay15.6 min
- July 202642▲ 68.0%vs July 2025
- Cancelled6.1%
- Legs flown under this number19
Recorded departures by month
All legs under this number combined; see the leg table.
The most recent periods19 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 37 | 26 | ▼ 29.7% |
| February | 24 | 31 | ▲ 29.2% |
| March | 7 | 31 | ▲ 342.9% |
| April | 50 | 30 | ▼ 40.0% |
| May | 11 | 32 | ▲ 190.9% |
| June | 16 | 40 | ▲ 150.0% |
| July | 25 | 42 | ▲ 68.0% |
| August | 21 | – | – |
| September | 9 | – | – |
| October | 24 | – | in progress |
| November | 56 | – | – |
| December | 45 | – | – |
| Year to date (Jan–Jul) | 170 | 232 | ▲ 36.5% |
according to the US BTS · October 2024 → July 2026
On-time departures by month
On time = departure within 15 minutes of schedule. Non-cancelled flights with a recorded delay only.
The most recent periods19 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 86.1% | 75.0% | ▼ 12.9% |
| February | 73.9% | 69.0% | ▼ 6.7% |
| March | 85.7% | 66.7% | ▼ 22.2% |
| April | 80.0% | 62.1% | ▼ 22.4% |
| May | 90.9% | 73.3% | ▼ 19.3% |
| June | 64.3% | 70.3% | ▲ 9.3% |
| July | 70.8% | 64.9% | ▼ 8.4% |
| August | 76.2% | – | – |
| September | 88.9% | – | – |
| October | 87.5% | – | in progress |
| November | 61.0% | – | – |
| December | 60.5% | – | – |
| Year-to-date average (Jan–Jul) | 78.8% | 68.7% | ▼ 12.8% |
according to the US BTS · October 2024 → July 2026
Average departure delay by month
according to the US BTS · October 2024 → July 2026
Cancelled departures by month
The most recent periods19 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 1 | 2 | ▲ 100.0% |
| February | 1 | 2 | ▲ 100.0% |
| March | 0 | 1 | – |
| April | 0 | 1 | – |
| May | 0 | 2 | – |
| June | 2 | 3 | ▲ 50.0% |
| July | 1 | 5 | ▲ 400.0% |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 15 | – | – |
| December | 2 | – | – |
| Year to date (Jan–Jul) | 5 | 16 | ▲ 220.0% |
according to the US BTS · October 2024 → July 2026
This is a historical record of departures already flown, not a forecast for your flight.
Several legs: the headline figure averages all of them. See the leg table.
Cancellation share
- Not cancelled 93.9% 636
- Cancelled 6.1% 41
Share of all recorded flights in the period, all legs. · Oct 12, 2024 → Jul 30, 2026
On time, leg by leg
Departures within 15 minutes of schedule; small figure = departures recorded.
Legs flown under this number
5| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| JFK BOS John F. Kennedy International Airport – Boston Logan International Airport | 300 | 12.0 min | 75.7% | 201 |
| BOS JFK Boston Logan International Airport – John F. Kennedy International Airport | 300 | 18.1 min | 67.5% | 137 |
| DCA LGA Ronald Reagan Washington National Airport – LaGuardia Airport | 345 | 20.6 min | 71.2% | 75 |
| LGA RIC LaGuardia Airport – Richmond International Airport | 470 | 29.9 min | 69.4% | 52 |
| RIC LGA Richmond International Airport – LaGuardia Airport | 470 | 34.8 min | 66.7% | 42 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 20 | 20 | 90.0% | 0 |
| November 2024 | 54 | 54 | 90.7% | 0 |
| December 2024 | 46 | 43 | 72.1% | 3 |
| January 2025 | 37 | 36 | 86.1% | 1 |
| February 2025 | 24 | 23 | 73.9% | 1 |
| March 2025 | 7 | 7 | 85.7% | 0 |
| April 2025 | 50 | 50 | 80.0% | 0 |
| May 2025 | 11 | 11 | 90.9% | 0 |
| June 2025 | 16 | 14 | 64.3% | 2 |
| July 2025 | 25 | 24 | 70.8% | 1 |
| August 2025 | 21 | 21 | 76.2% | 0 |
| September 2025 | 9 | 9 | 88.9% | 0 |
| October 2025 | 24 | 24 | 87.5% | 0 |
| November 2025 | 56 | 41 | 61.0% | 15 |
| December 2025 | 45 | 43 | 60.5% | 2 |
| January 2026 | 26 | 24 | 75.0% | 2 |
| February 2026 | 31 | 29 | 69.0% | 2 |
| March 2026 | 31 | 30 | 66.7% | 1 |
| April 2026 | 30 | 29 | 62.1% | 1 |
| May 2026 | 32 | 30 | 73.3% | 2 |
| June 2026 | 40 | 37 | 70.3% | 3 |
| July 2026 | 42 | 37 | 64.9% | 5 |