YX4640
YX4640 (Republic Airways) is a multi-stop service on 16 routes, busiest Key West to Washington. Of 595 departures recorded from October 2024 to July 2026, 82.2% left on time, according to the US BTS.
- On-time departures82.2%of 595 flights
- Average delay8.2 min
- July 202631▲ 14.8%vs July 2025
- Cancelled2.5%
- Legs flown under this number16
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 | 31 | 5 | ▼ 83.9% |
| February | 28 | 17 | ▼ 39.3% |
| March | 10 | 31 | ▲ 210.0% |
| April | 49 | 33 | ▼ 32.7% |
| May | 22 | 34 | ▲ 54.5% |
| June | 26 | 30 | ▲ 15.4% |
| July | 27 | 31 | ▲ 14.8% |
| August | 22 | – | – |
| September | 30 | – | – |
| October | 28 | – | in progress |
| November | 29 | – | – |
| December | 31 | – | – |
| Year to date (Jan–Jul) | 193 | 181 | ▼ 6.2% |
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 | 75.0% | 100.0% | ▲ 33.3% |
| February | 67.9% | 66.7% | ▼ 1.8% |
| March | 66.7% | 66.7% | 0.0% |
| April | 87.8% | 90.9% | ▲ 3.6% |
| May | 71.4% | 94.1% | ▲ 31.8% |
| June | 84.6% | 85.2% | ▲ 0.7% |
| July | 96.0% | 74.2% | ▼ 22.7% |
| August | 90.9% | – | – |
| September | 93.3% | – | – |
| October | 85.2% | – | in progress |
| November | 69.0% | – | – |
| December | 87.1% | – | – |
| Year-to-date average (Jan–Jul) | 78.5% | 82.5% | ▲ 5.2% |
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 | 3 | 0 | ▼ 100.0% |
| February | 0 | 2 | – |
| March | 1 | 1 | 0.0% |
| April | 0 | 0 | – |
| May | 1 | 0 | ▼ 100.0% |
| June | 0 | 3 | – |
| July | 2 | 0 | ▼ 100.0% |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 1 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 7 | 6 | ▼ 14.3% |
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 97.5% 580
- Cancelled 2.5% 15
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
5| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| EYW DCA Key West International Airport – Ronald Reagan Washington National Airport | 1,651 | 16.3 min | 76.1% | 193 |
| DCA BNA Ronald Reagan Washington National Airport – Nashville International Airport | 903 | -0.6 min | 91.4% | 106 |
| ORD MDT Chicago O'Hare International Airport – Harrisburg International Airport | 954 | 12.0 min | 82.6% | 72 |
| PHL CVG Philadelphia International Airport – Cincinnati Northern Kentucky International Airport | 814 | -2.2 min | 92.1% | 38 |
| LGA CHS LaGuardia Airport – Charleston International Airport | 1,033 | 7.3 min | 72.4% | 30 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 20 | 20 | 95.0% | 0 |
| November 2024 | 30 | 30 | 76.7% | 0 |
| December 2024 | 31 | 30 | 80.0% | 1 |
| January 2025 | 31 | 28 | 75.0% | 3 |
| February 2025 | 28 | 28 | 67.9% | 0 |
| March 2025 | 10 | 9 | 66.7% | 1 |
| April 2025 | 49 | 49 | 87.8% | 0 |
| May 2025 | 22 | 21 | 71.4% | 1 |
| June 2025 | 26 | 26 | 84.6% | 0 |
| July 2025 | 27 | 25 | 96.0% | 2 |
| August 2025 | 22 | 22 | 90.9% | 0 |
| September 2025 | 30 | 30 | 93.3% | 0 |
| October 2025 | 28 | 27 | 85.2% | 1 |
| November 2025 | 29 | 29 | 69.0% | 0 |
| December 2025 | 31 | 31 | 87.1% | 0 |
| January 2026 | 5 | 5 | 100.0% | 0 |
| February 2026 | 17 | 15 | 66.7% | 2 |
| March 2026 | 31 | 30 | 66.7% | 1 |
| April 2026 | 33 | 33 | 90.9% | 0 |
| May 2026 | 34 | 34 | 94.1% | 0 |
| June 2026 | 30 | 27 | 85.2% | 3 |
| July 2026 | 31 | 31 | 74.2% | 0 |