YX4597
YX4597 (Republic Airways) is a multi-stop service on 6 routes, busiest Washington to Key West. Of 503 departures recorded from October 2024 to July 2026, 84.3% left on time, according to the US BTS.
- On-time departures84.3%of 503 flights
- Average delay8.6 min
- July 202631▲ 6.9%vs July 2025
- Cancelled2.4%
- Legs flown under this number6
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 | 2 | ▼ 92.9% |
| March | 10 | 25 | ▲ 150.0% |
| April | 30 | 6 | ▼ 80.0% |
| May | 27 | 11 | ▼ 59.3% |
| June | 30 | 30 | 0.0% |
| July | 29 | 31 | ▲ 6.9% |
| August | 31 | – | – |
| September | 26 | – | – |
| October | 30 | – | in progress |
| November | 30 | – | – |
| December | 31 | – | – |
| Year to date (Jan–Jul) | 185 | 110 | ▼ 40.5% |
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 | 82.1% | 100.0% | ▲ 21.7% |
| February | 96.4% | 100.0% | ▲ 3.7% |
| March | 100.0% | 45.0% | ▼ 55.0% |
| April | 90.0% | 66.7% | ▼ 25.9% |
| May | 88.9% | 81.8% | ▼ 8.0% |
| June | 96.7% | 83.3% | ▼ 13.8% |
| July | 93.1% | 90.0% | ▼ 3.3% |
| August | 66.7% | – | – |
| September | 92.3% | – | – |
| October | 72.4% | – | in progress |
| November | 83.3% | – | – |
| December | 83.9% | – | – |
| Year-to-date average (Jan–Jul) | 92.5% | 81.0% | ▼ 12.4% |
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 | 0 | – |
| March | 1 | 5 | ▲ 400.0% |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 0 | 1 | – |
| August | 1 | – | – |
| September | 0 | – | – |
| October | 1 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 4 | 6 | ▲ 50.0% |
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 97.6% 491
- Cancelled 2.4% 12
Share of all recorded flights in the period, all legs. · Oct 18, 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 |
|---|---|---|---|---|
| DCA EYW Ronald Reagan Washington National Airport – Key West International Airport | 1,651 | 3.2 min | 87.3% | 193 |
| IND ORD Indianapolis International Airport – Chicago O'Hare International Airport | 286 | 5.3 min | 90.8% | 132 |
| LGA CMH LaGuardia Airport – John Glenn Columbus International Airport | 768 | 4.1 min | 91.1% | 90 |
| DCA BUF Ronald Reagan Washington National Airport – Buffalo Niagara International Airport | 476 | 14.7 min | 62.3% | 55 |
| LGA MSN LaGuardia Airport – Dane County Regional Truax Field | 1,304 | 71.2 min | 48.0% | 30 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 2 | 2 | 100.0% | 0 |
| November 2024 | 27 | 27 | 85.2% | 0 |
| December 2024 | 31 | 31 | 83.9% | 0 |
| January 2025 | 31 | 28 | 82.1% | 3 |
| February 2025 | 28 | 28 | 96.4% | 0 |
| March 2025 | 10 | 9 | 100.0% | 1 |
| April 2025 | 30 | 30 | 90.0% | 0 |
| May 2025 | 27 | 27 | 88.9% | 0 |
| June 2025 | 30 | 30 | 96.7% | 0 |
| July 2025 | 29 | 29 | 93.1% | 0 |
| August 2025 | 31 | 30 | 66.7% | 1 |
| September 2025 | 26 | 26 | 92.3% | 0 |
| October 2025 | 30 | 29 | 72.4% | 1 |
| November 2025 | 30 | 30 | 83.3% | 0 |
| December 2025 | 31 | 31 | 83.9% | 0 |
| January 2026 | 5 | 5 | 100.0% | 0 |
| February 2026 | 2 | 2 | 100.0% | 0 |
| March 2026 | 25 | 20 | 45.0% | 5 |
| April 2026 | 6 | 6 | 66.7% | 0 |
| May 2026 | 11 | 11 | 81.8% | 0 |
| June 2026 | 30 | 30 | 83.3% | 0 |
| July 2026 | 31 | 30 | 90.0% | 1 |