YX4604
YX4604 (Republic Airways) is a multi-stop service on 18 routes, busiest Washington to Hilton Head Island. Of 520 departures recorded from October 2024 to July 2026, 81.0% left on time, according to the US BTS.
- On-time departures81.0%of 520 flights
- Average delay9.6 min
- July 202627▲ 575.0%vs July 2025
- Cancelled1.9%
- 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 | 37 | 9 | ▼ 75.7% |
| February | 15 | 16 | ▲ 6.7% |
| March | 51 | 54 | ▲ 5.9% |
| April | 30 | 12 | ▼ 60.0% |
| May | 48 | 9 | ▼ 81.3% |
| June | 10 | 26 | ▲ 160.0% |
| July | 4 | 27 | ▲ 575.0% |
| August | 29 | – | – |
| September | 2 | – | – |
| October | – | – | in progress |
| November | 28 | – | – |
| December | 29 | – | – |
| Year to date (Jan–Jul) | 195 | 153 | ▼ 21.5% |
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 | 86.1% | 87.5% | ▲ 1.6% |
| February | 64.3% | 78.6% | ▲ 22.2% |
| March | 92.2% | 69.2% | ▼ 24.9% |
| April | 96.7% | 33.3% | ▼ 65.5% |
| May | 79.2% | 88.9% | ▲ 12.3% |
| June | 80.0% | 96.2% | ▲ 20.2% |
| July | 50.0% | 85.2% | ▲ 70.4% |
| August | 82.8% | – | – |
| September | 100.0% | – | – |
| October | – | – | in progress |
| November | 73.1% | – | – |
| December | 62.1% | – | – |
| Year-to-date average (Jan–Jul) | 78.3% | 77.0% | ▼ 1.7% |
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 | 1 | 0.0% |
| February | 1 | 2 | ▲ 100.0% |
| March | 0 | 2 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | – | – | in progress |
| November | 2 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 2 | 5 | ▲ 150.0% |
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 98.1% 510
- Cancelled 1.9% 10
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 HHH Ronald Reagan Washington National Airport – Hilton Head Airport | 808 | 4.1 min | 84.4% | 90 |
| ORD IND Chicago O'Hare International Airport – Indianapolis International Airport | 286 | 24.9 min | 68.3% | 62 |
| CMH LGA John Glenn Columbus International Airport – LaGuardia Airport | 768 | 3.8 min | 90.3% | 62 |
| HHH DCA Hilton Head Airport – Ronald Reagan Washington National Airport | 808 | 11.4 min | 76.9% | 54 |
| IAH ORD George Bush Intercontinental Airport – Chicago O'Hare International Airport | 1,491 | 12.8 min | 80.6% | 37 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 10 | 10 | 90.0% | 0 |
| November 2024 | 44 | 44 | 93.2% | 0 |
| December 2024 | 30 | 29 | 75.9% | 1 |
| January 2025 | 37 | 36 | 86.1% | 1 |
| February 2025 | 15 | 14 | 64.3% | 1 |
| March 2025 | 51 | 51 | 92.2% | 0 |
| April 2025 | 30 | 30 | 96.7% | 0 |
| May 2025 | 48 | 48 | 79.2% | 0 |
| June 2025 | 10 | 10 | 80.0% | 0 |
| July 2025 | 4 | 4 | 50.0% | 0 |
| August 2025 | 29 | 29 | 82.8% | 0 |
| September 2025 | 2 | 2 | 100.0% | 0 |
| November 2025 | 28 | 26 | 73.1% | 2 |
| December 2025 | 29 | 29 | 62.1% | 0 |
| January 2026 | 9 | 8 | 87.5% | 1 |
| February 2026 | 16 | 14 | 78.6% | 2 |
| March 2026 | 54 | 52 | 69.2% | 2 |
| April 2026 | 12 | 12 | 33.3% | 0 |
| May 2026 | 9 | 9 | 88.9% | 0 |
| June 2026 | 26 | 26 | 96.2% | 0 |
| July 2026 | 27 | 27 | 85.2% | 0 |