YX4536
YX4536 (Republic Airways) is a multi-stop service on 15 routes, busiest Knoxville to Chicago. Of 542 departures recorded from October 2024 to July 2026, 84.4% left on time, according to the US BTS.
- On-time departures84.4%of 542 flights
- Average delay8.3 min
- July 202613▼ 58.1%vs July 2025
- Cancelled3.1%
- Legs flown under this number15
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 | 31 | 31 | 0.0% |
| February | 27 | 45 | ▲ 66.7% |
| March | 6 | 35 | ▲ 483.3% |
| April | 23 | 52 | ▲ 126.1% |
| May | 27 | 26 | ▼ 3.7% |
| June | 29 | – | – |
| July | 31 | 13 | ▼ 58.1% |
| August | 5 | – | – |
| September | 23 | – | – |
| October | 4 | – | in progress |
| November | 22 | – | – |
| December | 26 | – | – |
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 | 82.1% | 76.9% | ▼ 6.4% |
| February | 88.0% | 73.8% | ▼ 16.1% |
| March | 100.0% | 80.0% | ▼ 20.0% |
| April | 95.7% | 86.5% | ▼ 9.5% |
| May | 92.3% | 96.2% | ▲ 4.2% |
| June | 86.2% | – | – |
| July | 58.1% | 80.0% | ▲ 37.8% |
| August | 40.0% | – | – |
| September | 91.3% | – | – |
| October | 75.0% | – | in progress |
| November | 86.4% | – | – |
| December | 76.9% | – | – |
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 | 3 | 5 | ▲ 66.7% |
| February | 2 | 3 | ▲ 50.0% |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | 1 | 0 | ▼ 100.0% |
| June | 0 | – | – |
| July | 0 | 3 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 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 96.9% 525
- Cancelled 3.1% 17
Share of all recorded flights in the period, all legs. · Oct 12, 2024 → Jul 28, 2026
On time, leg by leg
Departures within 15 minutes of schedule; small figure = departures recorded.
Legs flown under this number
7| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| TYS ORD McGhee Tyson Airport – Chicago O'Hare International Airport | 765 | 19.8 min | 74.2% | 89 |
| LGA DCA LaGuardia Airport – Ronald Reagan Washington National Airport | 345 | -3.6 min | 96.4% | 84 |
| PHL MEM Philadelphia International Airport – Frederick W. Smith International Airport | 1,405 | 4.3 min | 86.1% | 79 |
| DCA CHS Ronald Reagan Washington National Airport – Charleston International Airport | 715 | 19.6 min | 77.6% | 63 |
| DCA LGA Ronald Reagan Washington National Airport – LaGuardia Airport | 345 | 7.4 min | 88.1% | 42 |
| ORF ORD Norfolk International Airport – Chicago O'Hare International Airport | 1,152 | 14.6 min | 81.1% | 39 |
| ORD IAH Chicago O'Hare International Airport – George Bush Intercontinental Airport | 1,491 | 3.2 min | 88.2% | 37 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 40 | 40 | 95.0% | 0 |
| November 2024 | 30 | 30 | 100.0% | 0 |
| December 2024 | 16 | 16 | 81.3% | 0 |
| January 2025 | 31 | 28 | 82.1% | 3 |
| February 2025 | 27 | 25 | 88.0% | 2 |
| March 2025 | 6 | 6 | 100.0% | 0 |
| April 2025 | 23 | 23 | 95.7% | 0 |
| May 2025 | 27 | 26 | 92.3% | 1 |
| June 2025 | 29 | 29 | 86.2% | 0 |
| July 2025 | 31 | 31 | 58.1% | 0 |
| August 2025 | 5 | 5 | 40.0% | 0 |
| September 2025 | 23 | 23 | 91.3% | 0 |
| October 2025 | 4 | 4 | 75.0% | 0 |
| November 2025 | 22 | 22 | 86.4% | 0 |
| December 2025 | 26 | 26 | 76.9% | 0 |
| January 2026 | 31 | 26 | 76.9% | 5 |
| February 2026 | 45 | 42 | 73.8% | 3 |
| March 2026 | 35 | 35 | 80.0% | 0 |
| April 2026 | 52 | 52 | 86.5% | 0 |
| May 2026 | 26 | 26 | 96.2% | 0 |
| July 2026 | 13 | 10 | 80.0% | 3 |