Flight number record
MQ 4140
Envoy Air · Chicago to Avoca
- Route
- ORD → AVP
- Departs
- 20:41
- Flights
- 285
- Period
- July 2025 to June 2026
Historical statistics for July 2025 to June 2026, not live status. For today’s MQ 4140, check with Envoy Air. Envoy Air flies under contract for larger airlines, so a ticket for this flight may show a different airline code and number.
MQ 4140 sits in the middle of the pack with a B−. Close to three flights in four arrive on time by the DOT's definition, 2 points worse than the national rate of 77.6%. The late ones land a little over an hour behind schedule. That rests on 285 flights, with a median arrival 8 minutes early.
Key figures
On time
75.4%
Arrivals under 15 minutes late, of 268 completed flights
Avg delay
68 min
Across delayed arrivals only, not all flights
Cancelled
5.96%
National rate is 1.81%
1 hour+ late
9.3%
National rate is 8.1%
These figures cover 285 flights between July 2025 and June 2026. Beyond the headline rate, 9.3% of arrivals land a full hour or more behind schedule. That is the number that wrecks a connection, and it is not visible in an on-time percentage alone.
Schedule
When MQ 4140 flies
MQ 4140 flies ORD to AVP without a single fixed slot. Its most common scheduled departure was 20:41, used on 32 of 285 flights, with 20:50 (32 flights) and 20:56 (32 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.
- Departs 20:4132 flights11.2%
- Departs 20:5032 flights11.2%
- Departs 20:5632 flights11.2%
Scale runs 0% to 100%. Rows with fewer than 30 flights show a dash.
Share of scheduled departures at each local time. Times used on fewer than one flight in ten are not listed.
A 20:41 departure sits in the 8pm–5am window. Across every US flight scheduled in that window the on-time rate is 70.5%, and MQ 4140 runs 5 points better at 75.4%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.
Against the route
MQ 4140 next to ORD to AVP
Every carrier on ORD to AVP combined arrived on time 72.9% of the time across 842 flights, so MQ 4140 is 3 points ahead of it. Envoy flew 662 flights on the same city pair under all its flight numbers, including this one, and those ran 75.6% on time. Across its whole network Envoy Air managed 80.2%, which this flight trails by 5 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| MQ 4140thin sample | 285 | 75.4% | 68 min | 5.96% | B− |
| All Envoy Air on ORD–AVP | 662 | 75.6% | 62 min | 3.32% | B− |
| All carriers on ORD–AVP | 842 | 72.9% | 70 min | 2.85% | C |
| Envoy Air, whole network | 315,435 | 80.2% | 67 min | 2.30% | B |
Across the year
MQ 4140 quarter by quarter
MQ 4140 did not run the same all year. Its best quarter was Jul–Sep 2025 at 86.1% on time and its weakest Jan–Mar 2026 at 61.9%, a swing of 24 points on roughly 71 flights a quarter. The twelve-month rate averages over that, so if you are flying in a weak quarter the quarter's own figure is the better guide.
- Jul–Sep 202585 flights86.1%
- Oct–Dec 202587 flights71.1%
- Jan–Mar 202666 flights61.9%
- Apr–Jun 202647 flights83.7%
Scale runs 55% to 90%. Rows with fewer than 30 flights show a dash.
By weekday, MQ 4140 did best on Friday at 89.5% on time and worst on Tuesday at 69.0%. Each day rests on about 41 flights, so a gap of 21 points is worth noticing but could still narrow in another year.
Delay causes
Why MQ 4140 runs late
One category carries most of the weight here. Late-arriving aircraft accounts for 53% of the 4,517 delay minutes carriers reported, and the remaining four split what is left. The split is by minutes rather than by flights, so a few very long delays count for as much as many short ones.
- 53%Late-arriving aircraft
- 19%Carrier
- 15%Extreme weather
- 13%National Airspace System
Extreme weather accounts for 15% of delay minutes, well above the single-digit share typical across the system. Weather delays are lumpy: they arrive as whole bad days rather than as a steady drag, so the quarterly figures above are the more useful view of the risk. The national share is 6%, so this operation carries roughly 2.5 times the usual weather exposure. The split is drawn from 4,517 delay minutes reported on MQ 4140.
Cancellations run at 5.96%, against 1.81% nationally. That is roughly one flight in fifteen cancelled outright. A cancelled flight is invisible in every on-time figure on this page, so the punctuality numbers above describe only the flights that actually operated.
Connections and routes
What a delay on this flight costs
For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 9.3% of arrivals land a full hour or more behind schedule, against 8.1% nationally. A 45-minute layover does not survive that, and no amount of walking quickly changes it. Ninety minutes is the honest minimum here, and two hours if the onward flight is on a separate ticket.
The 632 miles between these two airports put this in the middle of the US network, around two and a half to three hours of block time. That is enough cruise to absorb a ten-minute late pushback and not enough to absorb thirty. It is also long enough that the aircraft usually flies three or four legs a day rather than six, which slows how fast delay compounds.
The same number turns up on two other city pairs in the data, including DFW to MOB (44) and MOB to DFW (44), but none flew often enough under MQ 4140 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to ORD to AVP only.
One caution: this is a thin sample. 285 flights over twelve months is enough to clear this site's floor but not enough to pin the rate down tightly, and a single bad week moves it by more than a point. Treat the grade as a rough reading.
What to do with this
Booking MQ 4140
For a booking, the cancellation rate is the figure to plan around on MQ 4140: 5.96% of its 285 scheduled flights did not operate. A late arrival costs a little over an hour, but a cancellation costs the day, so leave a later option open.
Related
Where to go next
- ORD to AVP, every carrier and departure
- AVP to ORD, the return direction
- Chicago O'Hare International (ORD) delay statistics
- Envoy Air on-time record
- Every Envoy Air flight number with a record
- The most and least reliable flight numbers in the US
- Why the first flight of the morning is statistically safest
A flight number here means Envoy Air’s own number as it reports to the DOT. How the figures are computed is on the methodology page.
Source: US DOT Bureau of Transportation Statistics, on-time performance data, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.