YX4555
YX4555 (Republic Airways) is a multi-stop service on 23 routes, busiest Key West to New York. Of 685 departures recorded from October 2024 to July 2026, 72.3% left on time, according to the US BTS.
- On-time departures72.3%of 685 flights
- Average delay15.3 min
- July 202660▲ 150.0%vs July 2025
- Cancelled4.1%
- Legs flown under this number23
Recorded departures by month
All legs under this number combined; see the leg table.
Months without data are left blank.
The most recent periods18 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 54 | 26 | ▼ 51.9% |
| February | 56 | 15 | ▼ 73.2% |
| March | 58 | 21 | ▼ 63.8% |
| April | 30 | 29 | ▼ 3.3% |
| May | 31 | 38 | ▲ 22.6% |
| June | 12 | 56 | ▲ 366.7% |
| July | 24 | 60 | ▲ 150.0% |
| August | 8 | – | – |
| September | 1 | – | – |
| October | – | – | in progress |
| November | 45 | – | – |
| December | 36 | – | – |
| Year to date (Jan–Jul) | 265 | 245 | ▼ 7.5% |
according to the US BTS · October 2024 → July 2026
On-time departures by month
Months without data are left blank.
On time = departure within 15 minutes of schedule. Non-cancelled flights with a recorded delay only.
The most recent periods18 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 79.6% | 62.5% | ▼ 21.5% |
| February | 73.2% | 66.7% | ▼ 8.9% |
| March | 62.1% | 56.3% | ▼ 9.4% |
| April | 86.7% | 86.2% | ▼ 0.5% |
| May | 67.7% | 65.8% | ▼ 2.9% |
| June | 66.7% | 79.3% | ▲ 18.9% |
| July | 63.2% | 52.0% | ▼ 17.7% |
| August | 62.5% | – | – |
| September | 100.0% | – | – |
| October | – | – | in progress |
| November | 76.7% | – | – |
| December | 74.3% | – | – |
| Year-to-date average (Jan–Jul) | 71.3% | 67.0% | ▼ 6.1% |
according to the US BTS · October 2024 → July 2026
Average departure delay by month
Months without data are left blank.
according to the US BTS · October 2024 → July 2026
Cancelled departures by month
Months without data are left blank.
The most recent periods18 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 0 | 2 | – |
| February | 0 | 0 | – |
| March | 0 | 5 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 3 | – |
| July | 5 | 10 | ▲ 100.0% |
| August | 0 | – | – |
| September | 0 | – | – |
| October | – | – | in progress |
| November | 2 | – | – |
| December | 1 | – | – |
| Year to date (Jan–Jul) | 5 | 20 | ▲ 300.0% |
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 95.9% 657
- Cancelled 4.1% 28
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 |
|---|---|---|---|---|
| EYW LGA Key West International Airport – LaGuardia Airport | 1,947 | 20.1 min | 69.2% | 201 |
| LGA EYW LaGuardia Airport – Key West International Airport | 1,947 | 3.6 min | 82.8% | 93 |
| LGA BOS LaGuardia Airport – Boston Logan International Airport | 296 | 4.7 min | 88.6% | 44 |
| HYA DCA Cape Cod Gateway Airport – Ronald Reagan Washington National Airport | 653 | 21.4 min | 64.9% | 43 |
| DCA HYA Ronald Reagan Washington National Airport – Cape Cod Gateway Airport | 653 | 14.4 min | 65.8% | 43 |
| ORD RDU Chicago O'Hare International Airport – Raleigh-Durham International Airport | 1,039 | 18.3 min | 62.9% | 37 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 20 | 20 | 95.0% | 0 |
| November 2024 | 28 | 28 | 89.3% | 0 |
| December 2024 | 37 | 37 | 73.0% | 0 |
| January 2025 | 54 | 54 | 79.6% | 0 |
| February 2025 | 56 | 56 | 73.2% | 0 |
| March 2025 | 58 | 58 | 62.1% | 0 |
| April 2025 | 30 | 30 | 86.7% | 0 |
| May 2025 | 31 | 31 | 67.7% | 0 |
| June 2025 | 12 | 12 | 66.7% | 0 |
| July 2025 | 24 | 19 | 63.2% | 5 |
| August 2025 | 8 | 8 | 62.5% | 0 |
| September 2025 | 1 | 1 | 100.0% | 0 |
| November 2025 | 45 | 43 | 76.7% | 2 |
| December 2025 | 36 | 35 | 74.3% | 1 |
| January 2026 | 26 | 24 | 62.5% | 2 |
| February 2026 | 15 | 15 | 66.7% | 0 |
| March 2026 | 21 | 16 | 56.3% | 5 |
| April 2026 | 29 | 29 | 86.2% | 0 |
| May 2026 | 38 | 38 | 65.8% | 0 |
| June 2026 | 56 | 53 | 79.3% | 3 |
| July 2026 | 60 | 50 | 52.0% | 10 |