MQ3931
MQ3931 (Envoy Air) is a multi-stop service on 17 routes, busiest Charleston to Chicago. Of 553 departures recorded from October 2024 to July 2026, 83.6% left on time, according to the US BTS.
- On-time departures83.6%of 553 flights
- Average delay7.4 min
- July 202622▼ 56.0%vs July 2025
- Cancelled1.1%
- Legs flown under this number17
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 | 11 | 10 | ▼ 9.1% |
| February | 29 | 2 | ▼ 93.1% |
| March | 50 | 5 | ▼ 90.0% |
| April | 7 | 25 | ▲ 257.1% |
| May | 3 | 29 | ▲ 866.7% |
| June | 46 | 23 | ▼ 50.0% |
| July | 50 | 22 | ▼ 56.0% |
| August | 10 | – | – |
| September | 16 | – | – |
| October | 30 | – | in progress |
| November | 29 | – | – |
| December | 43 | – | – |
| Year to date (Jan–Jul) | 196 | 116 | ▼ 40.8% |
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 | 81.8% | 90.0% | ▲ 10.0% |
| February | 75.9% | 50.0% | ▼ 34.1% |
| March | 90.0% | 100.0% | ▲ 11.1% |
| April | 20.0% | 92.0% | ▲ 360.0% |
| May | 100.0% | 100.0% | 0.0% |
| June | 89.1% | 91.3% | ▲ 2.4% |
| July | 77.1% | 77.3% | ▲ 0.2% |
| August | 80.0% | – | – |
| September | 100.0% | – | – |
| October | 83.3% | – | in progress |
| November | 78.6% | – | – |
| December | 62.8% | – | – |
| Year-to-date average (Jan–Jul) | 76.3% | 85.8% | ▲ 12.5% |
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 | 0 | – |
| February | 0 | 0 | – |
| March | 0 | 1 | – |
| April | 2 | 0 | ▼ 100.0% |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 2 | 0 | ▼ 100.0% |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 1 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 4 | 1 | ▼ 75.0% |
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 98.9% 547
- Cancelled 1.1% 6
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
6| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| CHS ORD Charleston International Airport – Chicago O'Hare International Airport | 1,224 | 8.3 min | 81.0% | 167 |
| ORD CHS Chicago O'Hare International Airport – Charleston International Airport | 1,224 | 3.7 min | 88.9% | 81 |
| SBA PHX Santa Barbara Municipal Airport – Phoenix Sky Harbor International Airport | 731 | 10.5 min | 82.7% | 53 |
| PHX SBA Phoenix Sky Harbor International Airport – Santa Barbara Municipal Airport | 731 | 9.7 min | 82.7% | 53 |
| MIA GSO Miami International Airport – Piedmont Triad International Airport | 1,146 | 6.3 min | 86.5% | 52 |
| PIA ORD General Wayne A. Downing Peoria International Airport – Chicago O'Hare International Airport | 209 | -0.2 min | 95.5% | 44 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 3 | 3 | 100.0% | 0 |
| November 2024 | 51 | 51 | 94.1% | 0 |
| December 2024 | 59 | 59 | 78.0% | 0 |
| January 2025 | 11 | 11 | 81.8% | 0 |
| February 2025 | 29 | 29 | 75.9% | 0 |
| March 2025 | 50 | 50 | 90.0% | 0 |
| April 2025 | 7 | 5 | 20.0% | 2 |
| May 2025 | 3 | 3 | 100.0% | 0 |
| June 2025 | 46 | 46 | 89.1% | 0 |
| July 2025 | 50 | 48 | 77.1% | 2 |
| August 2025 | 10 | 10 | 80.0% | 0 |
| September 2025 | 16 | 16 | 100.0% | 0 |
| October 2025 | 30 | 30 | 83.3% | 0 |
| November 2025 | 29 | 28 | 78.6% | 1 |
| December 2025 | 43 | 43 | 62.8% | 0 |
| January 2026 | 10 | 10 | 90.0% | 0 |
| February 2026 | 2 | 2 | 50.0% | 0 |
| March 2026 | 5 | 4 | 100.0% | 1 |
| April 2026 | 25 | 25 | 92.0% | 0 |
| May 2026 | 29 | 29 | 100.0% | 0 |
| June 2026 | 23 | 23 | 91.3% | 0 |
| July 2026 | 22 | 22 | 77.3% | 0 |