YX4635
YX4635 (Republic Airways) is a multi-stop service on 27 routes, busiest Boston to Syracuse. Of 455 departures recorded from October 2024 to July 2026, 83.8% left on time, according to the US BTS.
- On-time departures83.8%of 455 flights
- Average delay7.4 min
- July 202662▲ 1,450.0%vs July 2025
- Cancelled2.2%
- Legs flown under this number27
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 | 8 | 31 | ▲ 287.5% |
| February | 4 | 26 | ▲ 550.0% |
| March | 5 | 27 | ▲ 440.0% |
| April | – | 9 | – |
| May | 27 | 27 | 0.0% |
| June | 8 | 60 | ▲ 650.0% |
| July | 4 | 62 | ▲ 1,450.0% |
| August | 5 | – | – |
| September | 12 | – | – |
| October | 13 | – | in progress |
| November | 12 | – | – |
| December | 24 | – | – |
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 | 100.0% | 75.0% | ▼ 25.0% |
| February | 100.0% | 76.0% | ▼ 24.0% |
| March | 60.0% | 41.7% | ▼ 30.6% |
| April | – | 88.9% | – |
| May | 77.8% | 85.2% | ▲ 9.5% |
| June | 62.5% | 90.0% | ▲ 44.0% |
| July | 100.0% | 88.7% | ▼ 11.3% |
| August | 80.0% | – | – |
| September | 100.0% | – | – |
| October | 84.6% | – | in progress |
| November | 91.7% | – | – |
| December | 73.9% | – | – |
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 | 1 | 3 | ▲ 200.0% |
| February | 0 | 1 | – |
| March | 0 | 3 | – |
| April | – | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 1 | 0 | ▼ 100.0% |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| 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 97.8% 445
- Cancelled 2.2% 10
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
5| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| BOS SYR Boston Logan International Airport – Syracuse Hancock International Airport | 425 | -2.0 min | 92.3% | 78 |
| SYR BOS Syracuse Hancock International Airport – Boston Logan International Airport | 425 | 0.5 min | 86.1% | 72 |
| DCA ORD Ronald Reagan Washington National Airport – Chicago O'Hare International Airport | 983 | 25.2 min | 68.8% | 52 |
| DCA BOS Ronald Reagan Washington National Airport – Boston Logan International Airport | 641 | 5.3 min | 74.3% | 37 |
| ORD BTV Chicago O'Hare International Airport – Patrick Leahy Burlington International Airport | 1,225 | 23.7 min | 77.4% | 31 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 19 | 19 | 94.7% | 0 |
| November 2024 | 54 | 54 | 94.4% | 0 |
| December 2024 | 18 | 18 | 88.9% | 0 |
| January 2025 | 8 | 7 | 100.0% | 1 |
| February 2025 | 4 | 4 | 100.0% | 0 |
| March 2025 | 5 | 5 | 60.0% | 0 |
| May 2025 | 27 | 27 | 77.8% | 0 |
| June 2025 | 8 | 8 | 62.5% | 0 |
| July 2025 | 4 | 3 | 100.0% | 1 |
| August 2025 | 5 | 5 | 80.0% | 0 |
| September 2025 | 12 | 12 | 100.0% | 0 |
| October 2025 | 13 | 13 | 84.6% | 0 |
| November 2025 | 12 | 12 | 91.7% | 0 |
| December 2025 | 24 | 23 | 73.9% | 1 |
| January 2026 | 31 | 28 | 75.0% | 3 |
| February 2026 | 26 | 25 | 76.0% | 1 |
| March 2026 | 27 | 24 | 41.7% | 3 |
| April 2026 | 9 | 9 | 88.9% | 0 |
| May 2026 | 27 | 27 | 85.2% | 0 |
| June 2026 | 60 | 60 | 90.0% | 0 |
| July 2026 | 62 | 62 | 88.7% | 0 |