YX4493
YX4493 (Republic Airways) is a multi-stop service on 22 routes, busiest St Louis to Boston. Of 632 departures recorded from October 2024 to July 2026, 75.3% left on time, according to the US BTS.
- On-time departures75.3%of 632 flights
- Average delay14.1 min
- July 202662▲ 287.5%vs July 2025
- Cancelled3.5%
- Legs flown under this number22
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 | 23 | 30 | ▲ 30.4% |
| February | 36 | 31 | ▼ 13.9% |
| March | 9 | 18 | ▲ 100.0% |
| April | 30 | 24 | ▼ 20.0% |
| May | 58 | 39 | ▼ 32.8% |
| June | 20 | 60 | ▲ 200.0% |
| July | 16 | 62 | ▲ 287.5% |
| August | 4 | – | – |
| September | 28 | – | – |
| October | 31 | – | in progress |
| November | 26 | – | – |
| December | 16 | – | – |
| Year to date (Jan–Jul) | 192 | 264 | ▲ 37.5% |
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% | 82.1% | ▼ 17.9% |
| February | 97.0% | 69.0% | ▼ 28.9% |
| March | 87.5% | 66.7% | ▼ 23.8% |
| April | 89.7% | 58.3% | ▼ 34.9% |
| May | 55.2% | 76.9% | ▲ 39.4% |
| June | 85.0% | 68.3% | ▼ 19.6% |
| July | 61.5% | 62.1% | ▲ 0.9% |
| August | 50.0% | – | – |
| September | 77.8% | – | – |
| October | 61.3% | – | in progress |
| November | 92.3% | – | – |
| December | 80.0% | – | – |
| Year-to-date average (Jan–Jul) | 82.3% | 69.1% | ▼ 16.0% |
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 | 4 | 2 | ▼ 50.0% |
| February | 3 | 2 | ▼ 33.3% |
| March | 1 | 0 | ▼ 100.0% |
| April | 1 | 0 | ▼ 100.0% |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 3 | 4 | ▲ 33.3% |
| August | 0 | – | – |
| September | 1 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 1 | – | – |
| Year to date (Jan–Jul) | 12 | 8 | ▼ 33.3% |
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 96.5% 610
- Cancelled 3.5% 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
7| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| STL BOS St. Louis Lambert International Airport – Boston Logan International Airport | 1,680 | 6.8 min | 85.4% | 128 |
| DCA BOS Ronald Reagan Washington National Airport – Boston Logan International Airport | 641 | 14.1 min | 74.2% | 89 |
| RDU PIT Raleigh-Durham International Airport – Pittsburgh International Airport | 528 | 25.5 min | 65.7% | 72 |
| PIT RDU Pittsburgh International Airport – Raleigh-Durham International Airport | 528 | 12.9 min | 70.0% | 72 |
| BOS DCA Boston Logan International Airport – Ronald Reagan Washington National Airport | 641 | 20.1 min | 69.6% | 60 |
| RDU ORD Raleigh-Durham International Airport – Chicago O'Hare International Airport | 1,039 | 27.2 min | 63.2% | 38 |
| LGA MSN LaGuardia Airport – Dane County Regional Truax Field | 1,304 | 7.6 min | 78.1% | 33 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 19 | 19 | 100.0% | 0 |
| November 2024 | 26 | 26 | 88.5% | 0 |
| December 2024 | 26 | 26 | 84.6% | 0 |
| January 2025 | 23 | 19 | 100.0% | 4 |
| February 2025 | 36 | 33 | 97.0% | 3 |
| March 2025 | 9 | 8 | 87.5% | 1 |
| April 2025 | 30 | 29 | 89.7% | 1 |
| May 2025 | 58 | 58 | 55.2% | 0 |
| June 2025 | 20 | 20 | 85.0% | 0 |
| July 2025 | 16 | 13 | 61.5% | 3 |
| August 2025 | 4 | 4 | 50.0% | 0 |
| September 2025 | 28 | 27 | 77.8% | 1 |
| October 2025 | 31 | 31 | 61.3% | 0 |
| November 2025 | 26 | 26 | 92.3% | 0 |
| December 2025 | 16 | 15 | 80.0% | 1 |
| January 2026 | 30 | 28 | 82.1% | 2 |
| February 2026 | 31 | 29 | 69.0% | 2 |
| March 2026 | 18 | 18 | 66.7% | 0 |
| April 2026 | 24 | 24 | 58.3% | 0 |
| May 2026 | 39 | 39 | 76.9% | 0 |
| June 2026 | 60 | 60 | 68.3% | 0 |
| July 2026 | 62 | 58 | 62.1% | 4 |