MQ4178
MQ4178 (Envoy Air) is a multi-stop service on 9 routes, busiest Washington to Boston. Of 353 departures recorded from March 2025 to July 2026, 83.0% left on time, according to the US BTS.
- On-time departures83.0%of 353 flights
- Average delay8.3 min
- July 202636▲ 50.0%vs July 2025
- Cancelled1.7%
- Legs flown under this number9
Recorded departures by month
All legs under this number combined; see the leg table.
Months without data are left blank.
The most recent periods15 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | – | 27 | – |
| February | – | 27 | – |
| March | 50 | 31 | ▼ 38.0% |
| April | 7 | 30 | ▲ 328.6% |
| May | 1 | 30 | ▲ 2,900.0% |
| June | 22 | 36 | ▲ 63.6% |
| July | 24 | 36 | ▲ 50.0% |
| August | 4 | – | – |
| September | – | – | – |
| October | – | – | in progress |
| November | 16 | – | – |
| December | 12 | – | – |
according to the US BTS · March 2025 → 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 periods15 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | – | 80.0% | – |
| February | – | 88.9% | – |
| March | 70.0% | 66.7% | ▼ 4.8% |
| April | 85.7% | 78.6% | ▼ 8.3% |
| May | 100.0% | 93.1% | ▼ 6.9% |
| June | 95.5% | 94.4% | ▼ 1.1% |
| July | 91.7% | 86.1% | ▼ 6.1% |
| August | 100.0% | – | – |
| September | – | – | – |
| October | – | – | in progress |
| November | 87.5% | – | – |
| December | 58.3% | – | – |
according to the US BTS · March 2025 → July 2026
Average departure delay by month
Months without data are left blank.
according to the US BTS · March 2025 → July 2026
Cancelled departures by month
Months without data are left blank.
The most recent periods15 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | – | 2 | – |
| February | – | 0 | – |
| March | 0 | 1 | – |
| April | 0 | 2 | – |
| May | 0 | 1 | – |
| June | 0 | 0 | – |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | – | – | – |
| October | – | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
according to the US BTS · March 2025 → 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 98.3% 347
- Cancelled 1.7% 6
Share of all recorded flights in the period, all legs. · Mar 6, 2025 → Jul 30, 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 BOS Ronald Reagan Washington National Airport – Boston Logan International Airport | 641 | 8.8 min | 87.7% | 76 |
| ORD MHK Chicago O'Hare International Airport – Manhattan Regional Airport | 804 | 21.2 min | 67.7% | 71 |
| ORD MEM Chicago O'Hare International Airport – Frederick W. Smith International Airport | 792 | -0.1 min | 93.3% | 60 |
| SAV CLT Savannah Hilton Head International Airport – Charlotte Douglas International Airport | 344 | -2.1 min | 92.7% | 41 |
| CLT SAV Charlotte Douglas International Airport – Savannah Hilton Head International Airport | 344 | 2.1 min | 90.2% | 41 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| March 2025 | 50 | 50 | 70.0% | 0 |
| April 2025 | 7 | 7 | 85.7% | 0 |
| May 2025 | 1 | 1 | 100.0% | 0 |
| June 2025 | 22 | 22 | 95.5% | 0 |
| July 2025 | 24 | 24 | 91.7% | 0 |
| August 2025 | 4 | 4 | 100.0% | 0 |
| November 2025 | 16 | 16 | 87.5% | 0 |
| December 2025 | 12 | 12 | 58.3% | 0 |
| January 2026 | 27 | 25 | 80.0% | 2 |
| February 2026 | 27 | 27 | 88.9% | 0 |
| March 2026 | 31 | 30 | 66.7% | 1 |
| April 2026 | 30 | 28 | 78.6% | 2 |
| May 2026 | 30 | 29 | 93.1% | 1 |
| June 2026 | 36 | 36 | 94.4% | 0 |
| July 2026 | 36 | 36 | 86.1% | 0 |