MQ4321
MQ4321 (Envoy Air) is a multi-stop service on 2 routes, busiest Chicago to Waterloo. Of 383 departures recorded from June 2025 to July 2026, 67.3% left on time, according to the US BTS.
- On-time departures67.3%of 383 flights
- Average delay22.2 min
- July 20261▼ 96.8%vs July 2025
- Cancelled4.2%
- Legs flown under this number2
Recorded departures by month
All legs under this number combined; see the leg table.
The most recent periods14 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | – | 30 | – |
| February | – | 28 | – |
| March | – | 31 | – |
| April | – | 30 | – |
| May | – | 31 | – |
| June | 26 | 29 | ▲ 11.5% |
| July | 31 | 1 | ▼ 96.8% |
| August | 31 | – | – |
| September | 27 | – | – |
| October | 30 | – | in progress |
| November | 29 | – | – |
| December | 29 | – | – |
according to the US BTS · June 2025 → 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 periods14 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | – | 63.3% | – |
| February | – | 85.7% | – |
| March | – | 64.3% | – |
| April | – | 48.2% | – |
| May | – | 83.9% | – |
| June | 57.7% | 55.6% | ▼ 3.7% |
| July | 50.0% | 100.0% | ▲ 100.0% |
| August | 77.4% | – | – |
| September | 70.4% | – | – |
| October | 83.3% | – | in progress |
| November | 73.1% | – | – |
| December | 56.0% | – | – |
according to the US BTS · June 2025 → July 2026
Average departure delay by month
according to the US BTS · June 2025 → July 2026
Cancelled departures by month
The most recent periods14 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | – | 0 | – |
| February | – | 0 | – |
| March | – | 3 | – |
| April | – | 3 | – |
| May | – | 0 | – |
| June | 0 | 2 | – |
| July | 1 | 0 | ▼ 100.0% |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 3 | – | – |
| December | 4 | – | – |
according to the US BTS · June 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 95.8% 367
- Cancelled 4.2% 16
Share of all recorded flights in the period, all legs. · Jun 5, 2025 → Jul 1, 2026
Legs flown under this number
1| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| ORD ALO Chicago O'Hare International Airport – Waterloo Regional Airport | 375 | 22.7 min | 68.3% | 355 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| June 2025 | 26 | 26 | 57.7% | 0 |
| July 2025 | 31 | 30 | 50.0% | 1 |
| August 2025 | 31 | 31 | 77.4% | 0 |
| September 2025 | 27 | 27 | 70.4% | 0 |
| October 2025 | 30 | 30 | 83.3% | 0 |
| November 2025 | 29 | 26 | 73.1% | 3 |
| December 2025 | 29 | 25 | 56.0% | 4 |
| January 2026 | 30 | 30 | 63.3% | 0 |
| February 2026 | 28 | 28 | 85.7% | 0 |
| March 2026 | 31 | 28 | 64.3% | 3 |
| April 2026 | 30 | 27 | 48.2% | 3 |
| May 2026 | 31 | 31 | 83.9% | 0 |
| June 2026 | 29 | 27 | 55.6% | 2 |
| July 2026 | 1 | 1 | 100.0% | 0 |