MQ4104
MQ4104 (Envoy Air) is a multi-stop service on 7 routes, busiest Chicago to Rochester. Of 653 departures recorded from December 2024 to July 2026, 90.8% left on time, according to the US BTS.
- On-time departures90.8%of 653 flights
- Average delay3.8 min
- July 202662▲ 0.0%vs July 2025
- Cancelled0.6%
- Legs flown under this number7
Recorded departures by month
All legs under this number combined; see the leg table.
Months without data are left blank.
The most recent periods17 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | – | 5 | – |
| February | 2 | 14 | ▲ 600.0% |
| March | 20 | 6 | ▼ 70.0% |
| April | 56 | – | – |
| May | 61 | 22 | ▼ 63.9% |
| June | 60 | 59 | ▼ 1.7% |
| July | 62 | 62 | 0.0% |
| August | 56 | – | – |
| September | 52 | – | – |
| October | 59 | – | in progress |
| November | 26 | – | – |
| December | 29 | – | – |
according to the US BTS · December 2024 → 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 periods17 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | – | 100.0% | – |
| February | 50.0% | 78.6% | ▲ 57.1% |
| March | 75.0% | 100.0% | ▲ 33.3% |
| April | 90.9% | – | – |
| May | 91.8% | 95.5% | ▲ 4.0% |
| June | 95.0% | 94.9% | ▼ 0.1% |
| July | 93.6% | 98.4% | ▲ 5.2% |
| August | 80.4% | – | – |
| September | 92.0% | – | – |
| October | 86.4% | – | in progress |
| November | 92.3% | – | – |
| December | 85.7% | – | – |
according to the US BTS · December 2024 → July 2026
Average departure delay by month
Months without data are left blank.
according to the US BTS · December 2024 → July 2026
Cancelled departures by month
Months without data are left blank.
The most recent periods17 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | – | 0 | – |
| February | 0 | 0 | – |
| March | 0 | 0 | – |
| April | 1 | – | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | 2 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 1 | – | – |
according to the US BTS · December 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 99.4% 649
- Cancelled 0.6% 4
Share of all recorded flights in the period, all legs. · Dec 24, 2024 → Jul 31, 2026
On time, leg by leg
Departures within 15 minutes of schedule; small figure = departures recorded.
Legs flown under this number
4| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| ORD ROC Chicago O'Hare International Airport – Frederick Douglass Greater Rochester International Airport | 847 | 3.2 min | 91.5% | 283 |
| ROC ORD Frederick Douglass Greater Rochester International Airport – Chicago O'Hare International Airport | 847 | 4.3 min | 88.0% | 201 |
| STL ORD St. Louis Lambert International Airport – Chicago O'Hare International Airport | 415 | 3.7 min | 95.8% | 71 |
| ORD STL Chicago O'Hare International Airport – St. Louis Lambert International Airport | 415 | -2.5 min | 97.2% | 71 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| December 2024 | 2 | 2 | 100.0% | 0 |
| February 2025 | 2 | 2 | 50.0% | 0 |
| March 2025 | 20 | 20 | 75.0% | 0 |
| April 2025 | 56 | 55 | 90.9% | 1 |
| May 2025 | 61 | 61 | 91.8% | 0 |
| June 2025 | 60 | 60 | 95.0% | 0 |
| July 2025 | 62 | 62 | 93.6% | 0 |
| August 2025 | 56 | 56 | 80.4% | 0 |
| September 2025 | 52 | 50 | 92.0% | 2 |
| October 2025 | 59 | 59 | 86.4% | 0 |
| November 2025 | 26 | 26 | 92.3% | 0 |
| December 2025 | 29 | 28 | 85.7% | 1 |
| January 2026 | 5 | 5 | 100.0% | 0 |
| February 2026 | 14 | 14 | 78.6% | 0 |
| March 2026 | 6 | 6 | 100.0% | 0 |
| May 2026 | 22 | 22 | 95.5% | 0 |
| June 2026 | 59 | 59 | 94.9% | 0 |
| July 2026 | 62 | 62 | 98.4% | 0 |