MQ4155
MQ4155 (Envoy Air) is a multi-stop service on 11 routes, busiest Tulsa to Chicago. Of 742 departures recorded from October 2024 to July 2026, 81.7% left on time, according to the US BTS.
- On-time departures81.7%of 742 flights
- Average delay8.1 min
- July 202662
- Cancelled1.5%
- Legs flown under this number11
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 | 6 | 10 | ▲ 66.7% |
| February | – | 32 | – |
| March | 26 | 62 | ▲ 138.5% |
| April | 56 | 60 | ▲ 7.1% |
| May | 34 | 62 | ▲ 82.4% |
| June | 4 | 60 | ▲ 1,400.0% |
| July | – | 62 | – |
| August | 26 | – | – |
| September | 57 | – | – |
| October | 38 | – | in progress |
| November | 57 | – | – |
| December | 30 | – | – |
according to the US BTS · October 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 | 83.3% | 70.0% | ▼ 16.0% |
| February | – | 84.4% | – |
| March | 100.0% | 85.3% | ▼ 14.8% |
| April | 83.9% | 75.0% | ▼ 10.6% |
| May | 90.9% | 91.7% | ▲ 0.8% |
| June | 100.0% | 64.9% | ▼ 35.1% |
| July | – | 71.0% | – |
| August | 80.8% | – | – |
| September | 81.8% | – | – |
| October | 92.1% | – | in progress |
| November | 74.6% | – | – |
| December | 73.3% | – | – |
according to the US BTS · October 2024 → July 2026
Average departure delay by month
Months without data are left blank.
according to the US BTS · October 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 | 0 | – |
| February | – | 0 | – |
| March | 0 | 1 | – |
| April | 0 | 0 | – |
| May | 1 | 2 | ▲ 100.0% |
| June | 0 | 3 | – |
| July | – | 0 | – |
| August | 0 | – | – |
| September | 2 | – | – |
| October | 0 | – | in progress |
| November | 2 | – | – |
| December | 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 98.5% 731
- Cancelled 1.5% 11
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
9| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| TUL ORD Tulsa International Airport – Chicago O'Hare International Airport | 941 | 9.1 min | 83.2% | 127 |
| DFW GJT Dallas Fort Worth International Airport – Grand Junction Regional Airport | 1,243 | 3.9 min | 85.2% | 116 |
| GJT DFW Grand Junction Regional Airport – Dallas Fort Worth International Airport | 1,243 | 8.4 min | 76.8% | 114 |
| ORD TUL Chicago O'Hare International Airport – Tulsa International Airport | 941 | 5.1 min | 86.0% | 102 |
| TXK DFW Texarkana Regional Airport (Webb Field) – Dallas Fort Worth International Airport | 290 | 16.2 min | 69.0% | 72 |
| DFW TXK Dallas Fort Worth International Airport – Texarkana Regional Airport (Webb Field) | 290 | 9.3 min | 75.7% | 72 |
| ORD MDT Chicago O'Hare International Airport – Harrisburg International Airport | 954 | 4.5 min | 83.9% | 31 |
| MDT ORD Harrisburg International Airport – Chicago O'Hare International Airport | 954 | 5.2 min | 87.1% | 31 |
| ORD SDF Chicago O'Hare International Airport – Louisville Muhammad Ali International Airport | 462 | 11.4 min | 89.7% | 30 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 39 | 39 | 94.9% | 0 |
| November 2024 | 8 | 8 | 100.0% | 0 |
| December 2024 | 13 | 13 | 69.2% | 0 |
| January 2025 | 6 | 6 | 83.3% | 0 |
| March 2025 | 26 | 26 | 100.0% | 0 |
| April 2025 | 56 | 56 | 83.9% | 0 |
| May 2025 | 34 | 33 | 90.9% | 1 |
| June 2025 | 4 | 4 | 100.0% | 0 |
| August 2025 | 26 | 26 | 80.8% | 0 |
| September 2025 | 57 | 55 | 81.8% | 2 |
| October 2025 | 38 | 38 | 92.1% | 0 |
| November 2025 | 57 | 55 | 74.6% | 2 |
| December 2025 | 30 | 30 | 73.3% | 0 |
| January 2026 | 10 | 10 | 70.0% | 0 |
| February 2026 | 32 | 32 | 84.4% | 0 |
| March 2026 | 62 | 61 | 85.3% | 1 |
| April 2026 | 60 | 60 | 75.0% | 0 |
| May 2026 | 62 | 60 | 91.7% | 2 |
| June 2026 | 60 | 57 | 64.9% | 3 |
| July 2026 | 62 | 62 | 71.0% | 0 |