MQ3520
MQ3520 (Envoy Air) is a multi-stop service on 19 routes, busiest Boston to St Louis. Of 645 departures recorded from October 2024 to July 2026, 81.1% left on time, according to the US BTS.
- On-time departures81.1%of 645 flights
- Average delay8.8 min
- July 202662▲ 138.5%vs July 2025
- Cancelled2.3%
- 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 | 26 | 26 | 0.0% |
| February | 28 | 41 | ▲ 46.4% |
| March | 31 | 55 | ▲ 77.4% |
| April | 41 | 34 | ▼ 17.1% |
| May | 33 | 42 | ▲ 27.3% |
| June | 8 | 60 | ▲ 650.0% |
| July | 26 | 62 | ▲ 138.5% |
| August | 22 | – | – |
| September | 28 | – | – |
| October | 5 | – | in progress |
| November | 28 | – | – |
| December | 28 | – | – |
| Year to date (Jan–Jul) | 193 | 320 | ▲ 65.8% |
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 | 91.7% | 87.5% | ▼ 4.5% |
| February | 89.3% | 76.3% | ▼ 14.5% |
| March | 74.2% | 74.6% | ▲ 0.5% |
| April | 87.5% | 85.3% | ▼ 2.5% |
| May | 72.7% | 87.5% | ▲ 20.3% |
| June | 75.0% | 72.9% | ▼ 2.8% |
| July | 48.0% | 93.3% | ▲ 94.4% |
| August | 90.9% | – | – |
| September | 78.6% | – | – |
| October | 100.0% | – | in progress |
| November | 81.5% | – | – |
| December | 78.6% | – | – |
| Year-to-date average (Jan–Jul) | 76.9% | 82.5% | ▲ 7.2% |
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 | 2 | 2 | 0.0% |
| February | 0 | 3 | – |
| March | 0 | 0 | – |
| April | 1 | 0 | ▼ 100.0% |
| May | 0 | 2 | – |
| June | 0 | 1 | – |
| July | 1 | 2 | ▲ 100.0% |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 1 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 4 | 10 | ▲ 150.0% |
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 97.7% 630
- Cancelled 2.3% 15
Share of all recorded flights in the period, all legs. · Oct 16, 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 |
|---|---|---|---|---|
| BOS STL Boston Logan International Airport – St. Louis Lambert International Airport | 1,680 | 7.2 min | 81.3% | 116 |
| DFW CHA Dallas Fort Worth International Airport – Chattanooga Metropolitan Airport (Lovell Field) | 1,116 | 7.5 min | 83.8% | 82 |
| ORD FAR Chicago O'Hare International Airport – Hector International Airport | 895 | 1.1 min | 88.7% | 72 |
| FAR ORD Hector International Airport – Chicago O'Hare International Airport | 895 | 5.7 min | 82.4% | 72 |
| ORD CMH Chicago O'Hare International Airport – John Glenn Columbus International Airport | 475 | 10.1 min | 81.4% | 70 |
| ORD ELP Chicago O'Hare International Airport – El Paso International Airport | 1,987 | 19.3 min | 68.3% | 64 |
| LAN ORD Capital Region International Airport – Chicago O'Hare International Airport | 287 | 7.9 min | 74.2% | 31 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 3 | 3 | 100.0% | 0 |
| November 2024 | 17 | 17 | 88.2% | 0 |
| December 2024 | 1 | 1 | 100.0% | 0 |
| January 2025 | 26 | 24 | 91.7% | 2 |
| February 2025 | 28 | 28 | 89.3% | 0 |
| March 2025 | 31 | 31 | 74.2% | 0 |
| April 2025 | 41 | 40 | 87.5% | 1 |
| May 2025 | 33 | 33 | 72.7% | 0 |
| June 2025 | 8 | 8 | 75.0% | 0 |
| July 2025 | 26 | 25 | 48.0% | 1 |
| August 2025 | 22 | 22 | 90.9% | 0 |
| September 2025 | 28 | 28 | 78.6% | 0 |
| October 2025 | 5 | 5 | 100.0% | 0 |
| November 2025 | 28 | 27 | 81.5% | 1 |
| December 2025 | 28 | 28 | 78.6% | 0 |
| January 2026 | 26 | 24 | 87.5% | 2 |
| February 2026 | 41 | 38 | 76.3% | 3 |
| March 2026 | 55 | 55 | 74.6% | 0 |
| April 2026 | 34 | 34 | 85.3% | 0 |
| May 2026 | 42 | 40 | 87.5% | 2 |
| June 2026 | 60 | 59 | 72.9% | 1 |
| July 2026 | 62 | 60 | 93.3% | 2 |