YX4580
YX4580 (Republic Airways) is a multi-stop service on 11 routes, busiest Boston to New York. Of 588 departures recorded from October 2024 to July 2026, 74.6% left on time, according to the US BTS.
- On-time departures74.6%of 588 flights
- Average delay13.2 min
- July 202633▲ 6.5%vs July 2025
- Cancelled6.8%
- Legs flown under this number11
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 | 25 | 26 | ▲ 4.0% |
| February | 28 | 24 | ▼ 14.3% |
| March | 31 | 30 | ▼ 3.2% |
| April | 30 | 54 | ▲ 80.0% |
| May | 31 | 42 | ▲ 35.5% |
| June | 30 | 8 | ▼ 73.3% |
| July | 31 | 33 | ▲ 6.5% |
| August | 31 | – | – |
| September | 30 | – | – |
| October | 16 | – | in progress |
| November | 24 | – | – |
| December | 21 | – | – |
| Year to date (Jan–Jul) | 206 | 217 | ▲ 5.3% |
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 | 91.7% | 82.6% | ▼ 9.9% |
| February | 70.4% | 85.7% | ▲ 21.8% |
| March | 82.1% | 93.1% | ▲ 13.3% |
| April | 80.0% | 90.7% | ▲ 13.4% |
| May | 54.8% | 85.7% | ▲ 56.3% |
| June | 50.0% | 87.5% | ▲ 75.0% |
| July | 42.9% | 93.6% | ▲ 118.3% |
| August | 53.3% | – | – |
| September | 33.3% | – | – |
| October | 56.3% | – | in progress |
| November | 90.5% | – | – |
| December | 63.2% | – | – |
| Year-to-date average (Jan–Jul) | 67.4% | 88.4% | ▲ 31.2% |
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 | 3 | ▲ 200.0% |
| February | 1 | 3 | ▲ 200.0% |
| March | 3 | 1 | ▼ 66.7% |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 6 | 0 | ▼ 100.0% |
| July | 10 | 2 | ▼ 80.0% |
| August | 1 | – | – |
| September | 3 | – | – |
| October | 0 | – | in progress |
| November | 3 | – | – |
| December | 2 | – | – |
| Year to date (Jan–Jul) | 21 | 9 | ▼ 57.1% |
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 93.2% 548
- Cancelled 6.8% 40
Share of all recorded flights in the period, all legs. · Oct 12, 2024 → Jul 31, 2026
On time, leg by leg
Departures within 15 minutes of schedule; small figure = departures recorded.
Legs flown under this number
6| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| BOS JFK Boston Logan International Airport – John F. Kennedy International Airport | 300 | 22.6 min | 64.2% | 322 |
| IND DCA Indianapolis International Airport – Ronald Reagan Washington National Airport | 802 | 7.2 min | 80.9% | 99 |
| LGA ATL LaGuardia Airport – Hartsfield Jackson Atlanta International Airport | 1,225 | 0.5 min | 90.9% | 44 |
| ATL LGA Hartsfield Jackson Atlanta International Airport – LaGuardia Airport | 1,225 | 2.6 min | 84.1% | 44 |
| CHA DCA Chattanooga Metropolitan Airport (Lovell Field) – Ronald Reagan Washington National Airport | 840 | -7.2 min | 100.0% | 31 |
| PIT PHL Pittsburgh International Airport – Philadelphia International Airport | 430 | -5.5 min | 96.6% | 30 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 20 | 20 | 85.0% | 0 |
| November 2024 | 8 | 8 | 87.5% | 0 |
| December 2024 | 15 | 14 | 64.3% | 1 |
| January 2025 | 25 | 24 | 91.7% | 1 |
| February 2025 | 28 | 27 | 70.4% | 1 |
| March 2025 | 31 | 28 | 82.1% | 3 |
| April 2025 | 30 | 30 | 80.0% | 0 |
| May 2025 | 31 | 31 | 54.8% | 0 |
| June 2025 | 30 | 24 | 50.0% | 6 |
| July 2025 | 31 | 21 | 42.9% | 10 |
| August 2025 | 31 | 30 | 53.3% | 1 |
| September 2025 | 30 | 27 | 33.3% | 3 |
| October 2025 | 16 | 16 | 56.3% | 0 |
| November 2025 | 24 | 21 | 90.5% | 3 |
| December 2025 | 21 | 19 | 63.2% | 2 |
| January 2026 | 26 | 23 | 82.6% | 3 |
| February 2026 | 24 | 21 | 85.7% | 3 |
| March 2026 | 30 | 29 | 93.1% | 1 |
| April 2026 | 54 | 54 | 90.7% | 0 |
| May 2026 | 42 | 42 | 85.7% | 0 |
| June 2026 | 8 | 8 | 87.5% | 0 |
| July 2026 | 33 | 31 | 93.6% | 2 |