YX4639
YX4639 (Republic Airways) is a multi-stop service on 17 routes, busiest Nashville to Raleigh. Of 521 departures recorded from October 2024 to July 2026, 86.8% left on time, according to the US BTS.
- On-time departures86.8%of 521 flights
- Average delay4.0 min
- July 202631▲ 675.0%vs July 2025
- Cancelled4.2%
- Legs flown under this number17
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 | 30 | 31 | ▲ 3.3% |
| February | 28 | 28 | 0.0% |
| March | 30 | 45 | ▲ 50.0% |
| April | 26 | 30 | ▲ 15.4% |
| May | 26 | 32 | ▲ 23.1% |
| June | 8 | 30 | ▲ 275.0% |
| July | 4 | 31 | ▲ 675.0% |
| August | 19 | – | – |
| September | 30 | – | – |
| October | 5 | – | in progress |
| November | 24 | – | – |
| December | 30 | – | – |
| Year to date (Jan–Jul) | 152 | 227 | ▲ 49.3% |
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 | 92.3% | 82.8% | ▼ 10.3% |
| February | 80.0% | 82.1% | ▲ 2.7% |
| March | 93.3% | 81.4% | ▼ 12.8% |
| April | 92.3% | 83.3% | ▼ 9.7% |
| May | 79.2% | 90.0% | ▲ 13.7% |
| June | 100.0% | 90.0% | ▼ 10.0% |
| July | 66.7% | 100.0% | ▲ 50.0% |
| August | 79.0% | – | – |
| September | 93.3% | – | – |
| October | 80.0% | – | in progress |
| November | 87.0% | – | – |
| December | 73.1% | – | – |
| Year-to-date average (Jan–Jul) | 86.3% | 87.1% | ▲ 1.0% |
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 | 4 | 2 | ▼ 50.0% |
| February | 3 | 0 | ▼ 100.0% |
| March | 0 | 2 | – |
| April | 0 | 0 | – |
| May | 2 | 2 | 0.0% |
| June | 1 | 0 | ▼ 100.0% |
| July | 1 | 0 | ▼ 100.0% |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 1 | – | – |
| December | 4 | – | – |
| Year to date (Jan–Jul) | 11 | 6 | ▼ 45.5% |
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 95.8% 499
- Cancelled 4.2% 22
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 |
|---|---|---|---|---|
| BNA RDU Nashville International Airport – Raleigh-Durham International Airport | 710 | 0.8 min | 90.4% | 136 |
| DCA BOS Ronald Reagan Washington National Airport – Boston Logan International Airport | 641 | 2.8 min | 88.3% | 82 |
| DCA PVD Ronald Reagan Washington National Airport – Rhode Island T. F. Green International Airport | 573 | 5.2 min | 83.3% | 38 |
| ORD ROC Chicago O'Hare International Airport – Frederick Douglass Greater Rochester International Airport | 847 | 8.1 min | 74.3% | 37 |
| DCA CAE Ronald Reagan Washington National Airport – Columbia Metropolitan Airport | 657 | -0.6 min | 90.9% | 33 |
| STL PHL St. Louis Lambert International Airport – Philadelphia International Airport | 1,306 | -2.2 min | 93.1% | 31 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 18 | 18 | 100.0% | 0 |
| November 2024 | 7 | 7 | 100.0% | 0 |
| December 2024 | 9 | 9 | 66.7% | 0 |
| January 2025 | 30 | 26 | 92.3% | 4 |
| February 2025 | 28 | 25 | 80.0% | 3 |
| March 2025 | 30 | 30 | 93.3% | 0 |
| April 2025 | 26 | 26 | 92.3% | 0 |
| May 2025 | 26 | 24 | 79.2% | 2 |
| June 2025 | 8 | 7 | 100.0% | 1 |
| July 2025 | 4 | 3 | 66.7% | 1 |
| August 2025 | 19 | 19 | 79.0% | 0 |
| September 2025 | 30 | 30 | 93.3% | 0 |
| October 2025 | 5 | 5 | 80.0% | 0 |
| November 2025 | 24 | 23 | 87.0% | 1 |
| December 2025 | 30 | 26 | 73.1% | 4 |
| January 2026 | 31 | 29 | 82.8% | 2 |
| February 2026 | 28 | 28 | 82.1% | 0 |
| March 2026 | 45 | 43 | 81.4% | 2 |
| April 2026 | 30 | 30 | 83.3% | 0 |
| May 2026 | 32 | 30 | 90.0% | 2 |
| June 2026 | 30 | 30 | 90.0% | 0 |
| July 2026 | 31 | 31 | 100.0% | 0 |