YX4541
YX4541 (Republic Airways) is a multi-stop service on 18 routes, busiest Washington to Philadelphia. Of 566 departures recorded from October 2024 to July 2026, 81.5% left on time, according to the US BTS.
- On-time departures81.5%of 566 flights
- Average delay7.2 min
- July 202630▲ 11.1%vs July 2025
- Cancelled3.7%
- Legs flown under this number18
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 | 30 | 30 | 0.0% |
| February | 20 | 28 | ▲ 40.0% |
| March | 4 | 31 | ▲ 675.0% |
| April | – | 27 | – |
| May | 32 | 27 | ▼ 15.6% |
| June | 26 | 26 | 0.0% |
| July | 27 | 30 | ▲ 11.1% |
| August | 30 | – | – |
| September | 30 | – | – |
| October | 31 | – | in progress |
| November | 29 | – | – |
| December | 27 | – | – |
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 | 86.2% | 84.6% | ▼ 1.8% |
| February | 80.0% | 71.4% | ▼ 10.7% |
| March | 100.0% | 70.4% | ▼ 29.6% |
| April | – | 57.7% | – |
| May | 93.8% | 60.0% | ▼ 36.0% |
| June | 92.3% | 69.2% | ▼ 25.0% |
| July | 85.2% | 65.4% | ▼ 23.3% |
| August | 96.7% | – | – |
| September | 96.7% | – | – |
| October | 96.8% | – | in progress |
| November | 80.0% | – | – |
| December | 61.5% | – | – |
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 | 1 | 4 | ▲ 300.0% |
| February | 0 | 0 | – |
| March | 0 | 4 | – |
| April | – | 1 | – |
| May | 0 | 2 | – |
| June | 0 | 0 | – |
| July | 0 | 4 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 4 | – | – |
| December | 1 | – | – |
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 96.3% 545
- Cancelled 3.7% 21
Share of all recorded flights in the period, all legs. · Oct 13, 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 PHL Ronald Reagan Washington National Airport – Philadelphia International Airport | 192 | -2.3 min | 94.4% | 161 |
| ORD RDU Chicago O'Hare International Airport – Raleigh-Durham International Airport | 1,039 | 21.4 min | 64.8% | 98 |
| IND ORD Indianapolis International Airport – Chicago O'Hare International Airport | 286 | 16.7 min | 70.0% | 45 |
| ORD PIT Chicago O'Hare International Airport – Pittsburgh International Airport | 662 | 3.7 min | 81.4% | 43 |
| ORD DCA Chicago O'Hare International Airport – Ronald Reagan Washington National Airport | 983 | 9.2 min | 78.8% | 37 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 17 | 17 | 100.0% | 0 |
| November 2024 | 45 | 45 | 86.7% | 0 |
| December 2024 | 19 | 19 | 84.2% | 0 |
| January 2025 | 30 | 29 | 86.2% | 1 |
| February 2025 | 20 | 20 | 80.0% | 0 |
| March 2025 | 4 | 4 | 100.0% | 0 |
| May 2025 | 32 | 32 | 93.8% | 0 |
| June 2025 | 26 | 26 | 92.3% | 0 |
| July 2025 | 27 | 27 | 85.2% | 0 |
| August 2025 | 30 | 30 | 96.7% | 0 |
| September 2025 | 30 | 30 | 96.7% | 0 |
| October 2025 | 31 | 31 | 96.8% | 0 |
| November 2025 | 29 | 25 | 80.0% | 4 |
| December 2025 | 27 | 26 | 61.5% | 1 |
| January 2026 | 30 | 26 | 84.6% | 4 |
| February 2026 | 28 | 28 | 71.4% | 0 |
| March 2026 | 31 | 27 | 70.4% | 4 |
| April 2026 | 27 | 26 | 57.7% | 1 |
| May 2026 | 27 | 25 | 60.0% | 2 |
| June 2026 | 26 | 26 | 69.2% | 0 |
| July 2026 | 30 | 26 | 65.4% | 4 |