YX4384
YX4384 (Republic Airways) is a multi-stop service on 19 routes, busiest Chicago to Boston. Of 492 departures recorded from October 2024 to July 2026, 73.6% left on time, according to the US BTS.
- On-time departures73.6%of 492 flights
- Average delay17.0 min
- July 202631▲ 287.5%vs July 2025
- Cancelled4.5%
- Legs flown under this number19
Recorded departures by month
All legs under this number combined; see the leg table.
The most recent periods19 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 5 | 27 | ▲ 440.0% |
| February | 4 | 27 | ▲ 575.0% |
| March | 27 | 31 | ▲ 14.8% |
| April | 33 | 27 | ▼ 18.2% |
| May | 33 | 27 | ▼ 18.2% |
| June | 12 | 30 | ▲ 150.0% |
| July | 8 | 31 | ▲ 287.5% |
| August | 20 | – | – |
| September | 8 | – | – |
| October | 2 | – | in progress |
| November | 29 | – | – |
| December | 30 | – | – |
| Year to date (Jan–Jul) | 122 | 200 | ▲ 63.9% |
according to the US BTS · October 2024 → July 2026
On-time departures by month
On time = departure within 15 minutes of schedule. Non-cancelled flights with a recorded delay only.
The most recent periods19 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 100.0% | 65.4% | ▼ 34.6% |
| February | 75.0% | 65.2% | ▼ 13.0% |
| March | 92.3% | 64.3% | ▼ 30.4% |
| April | 72.7% | 70.4% | ▼ 3.2% |
| May | 62.5% | 70.4% | ▲ 12.6% |
| June | 58.3% | 51.7% | ▼ 11.3% |
| July | 33.3% | 64.3% | ▲ 92.9% |
| August | 80.0% | – | – |
| September | 87.5% | – | – |
| October | 50.0% | – | in progress |
| November | 84.6% | – | – |
| December | 60.7% | – | – |
| Year-to-date average (Jan–Jul) | 70.6% | 64.5% | ▼ 8.6% |
according to the US BTS · October 2024 → July 2026
Average departure delay by month
according to the US BTS · October 2024 → July 2026
Cancelled departures by month
The most recent periods19 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 0 | 1 | – |
| February | 0 | 4 | – |
| March | 1 | 3 | ▲ 200.0% |
| April | 0 | 0 | – |
| May | 1 | 0 | ▼ 100.0% |
| June | 0 | 1 | – |
| July | 2 | 3 | ▲ 50.0% |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 3 | – | – |
| December | 2 | – | – |
| Year to date (Jan–Jul) | 4 | 12 | ▲ 200.0% |
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 95.5% 470
- Cancelled 4.5% 22
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 |
|---|---|---|---|---|
| ORD BOS Chicago O'Hare International Airport – Boston Logan International Airport | 1,391 | 29.1 min | 69.4% | 115 |
| DCA LGA Ronald Reagan Washington National Airport – LaGuardia Airport | 345 | 24.6 min | 65.8% | 83 |
| LGA DCA LaGuardia Airport – Ronald Reagan Washington National Airport | 345 | 17.5 min | 71.9% | 68 |
| TUL DCA Tulsa International Airport – Ronald Reagan Washington National Airport | 1,685 | 6.3 min | 77.8% | 55 |
| DCA CID Ronald Reagan Washington National Airport – The Eastern Iowa Airport | 1,286 | 7.7 min | 75.7% | 37 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 40 | 40 | 95.0% | 0 |
| November 2024 | 18 | 18 | 100.0% | 0 |
| December 2024 | 23 | 22 | 95.5% | 1 |
| January 2025 | 5 | 5 | 100.0% | 0 |
| February 2025 | 4 | 4 | 75.0% | 0 |
| March 2025 | 27 | 26 | 92.3% | 1 |
| April 2025 | 33 | 33 | 72.7% | 0 |
| May 2025 | 33 | 32 | 62.5% | 1 |
| June 2025 | 12 | 12 | 58.3% | 0 |
| July 2025 | 8 | 6 | 33.3% | 2 |
| August 2025 | 20 | 20 | 80.0% | 0 |
| September 2025 | 8 | 8 | 87.5% | 0 |
| October 2025 | 2 | 2 | 50.0% | 0 |
| November 2025 | 29 | 26 | 84.6% | 3 |
| December 2025 | 30 | 28 | 60.7% | 2 |
| January 2026 | 27 | 26 | 65.4% | 1 |
| February 2026 | 27 | 23 | 65.2% | 4 |
| March 2026 | 31 | 28 | 64.3% | 3 |
| April 2026 | 27 | 27 | 70.4% | 0 |
| May 2026 | 27 | 27 | 70.4% | 0 |
| June 2026 | 30 | 29 | 51.7% | 1 |
| July 2026 | 31 | 28 | 64.3% | 3 |