Carrier route record
MQCOU→ORD
Envoy Air · Columbia to Chicago
- Flights
- 1,152
- Period
- September 2025 to August 2026
- Share of route
- 56%
- Carriers
- 2
Historical statistics for September 2025 to August 2026, not live status. For today’s flights, check with Envoy Air.
Envoy on COU to ORD lands a B, level with the national rate of 77.3%. Roughly one flight in four arrives 15 minutes late or worse, and those flights are late by an hour and a half on average. That rests on 1,152 flights, with a median arrival 9 minutes early.
The US average over the same twelve months is 77.3%, so there is little to separate Envoy on COU to ORD from the country as a whole. The variation that matters here is internal: which carrier, and what time of day.
Key figures
On time
76.9%
Arrivals under 15 minutes late, of 1,116 completed flights
Avg delay
83 min
Across delayed arrivals only, not all flights
Cancelled
2.69%
National rate is 1.89%
Whole route
73.7%
Every carrier on COU to ORD, 2,054 flights
These figures cover 1,152 flights between September 2025 and August 2026. Beyond the headline rate, 10.4% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Carrier by carrier
Envoy against every carrier on COU to ORD
Envoy flew 1,152 of the 2,054 flights on COU to ORD, most of the route. Its 76.9% on time is 3 points better than the route as a whole, which runs 73.7%. Ranked by on-time rate it is first of two carriers on the route, where the range runs from Envoy at 76.9% to SkyWest at 69.6%.
Only one carrier clears this site's 365-flight floor here, so there is no comparison to draw. The table below is the full picture.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| Envoy Air (this page) | 1,152 | 76.9% | 83 min | 2.69% | B |
| SkyWest Airlines | 902 | 69.6% | 116 min | 4.88% | C− |
Flight by flight
Envoy flight numbers on COU to ORD
Timetable by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.
Departure window
When Envoy runs best on this route
Departure time matters more here than the choice of carrier. The gap between the best and worst window is 25 points, against half a point between the best and worst carrier.
- 5am–8am365 flights86.7%
- 8am–11am184 flights77.6%
- 11am–2pm189 flights79.9%
- 2pm–5pm142 flights74.3%
- 5pm–8pm272 flights61.7%
- 8pm–5am—
Scale runs 55% to 90%. Rows with fewer than 30 flights show a dash.
The 5pm–8pm window is where this operation falls apart: 61.7% on time, against 86.7% for the 5am–8am slot. By evening the aircraft flying these rotations have absorbed a full day of small delays and there is no slack left to recover in. The 5am–8am window is the busiest, with 365 flights scheduled in it.
Across the year
Envoy on COU to ORD through the year
December is the weak month at 63.0% on time, against 86.1% in February. Winter delays cluster: a single storm system can account for most of a month's shortfall, so an average December hides both very good weeks and genuinely unflyable days. October was the busiest month here, with 117 flights.
Across the week, Wednesday is the strongest day at 80.8% on time and Sunday the weakest at 71.3%, a spread of 10 points.
Arrival by arrival
How late Envoy on COU to ORD runs when it is late
Envoy on COU to ORD often beats the schedule: 451 of 1,116 completed flights, 40%, arrived 15 minutes or more early. The 258 late arrivals split 83 under half an hour, 59 between 30 and 60 minutes, and 116 an hour or more.
- 15+ min early451 flights40.4%
- Within 15 min407 flights36.5%
- 15–29 min late83 flights7.4%
- 30–59 min late59 flights5.3%
- 1–2 hours late70 flights6.3%
- 2+ hours late46 flights4.1%
Scale runs 0% to 100%.
Share of 1,116 completed flights by arrival against schedule.
49 of 236 late departures made up the time and arrived on time, 21% of them. In the other direction, 71 flights left on time yet arrived 15 minutes late or more, so that delay built up after pushback: in the air, in a holding pattern or on the ground at ORD.
The worst days
Worst days for Envoy on COU to ORD
The latest arrival of the period was on 1 September 2025, 13 hours 36 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. The same cause led on three of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 1 September 2025 | 13 hours 36 minutes | Late-arriving aircraft |
| 7 June 2026 | 13 hours 28 minutes | Late-arriving aircraft |
| 19 February 2026 | 9 hours 44 minutes | Carrier |
| 27 July 2026 | 8 hours 39 minutes | Extreme weather |
| 18 December 2025 | 7 hours 41 minutes | Late-arriving aircraft |
Delay causes
Why Envoy runs late on this route
Late-arriving aircraft accounts for 51% of the 21,000 delay minutes carriers reported here, and the remaining four split what is left.
- 51%Late-arriving aircraft
- 20%National Airspace System
- 16%Extreme weather
- 13%Carrier
- 0%Security
Extreme weather accounts for 16% 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 monthly strip above is the more useful view of the risk. The national share is 6%, so this operation carries roughly 2.6 times the usual weather exposure. The split is drawn from 21,331 reported delay minutes.
51% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 21,000 reported delay minutes here, that single category outweighs weather by 3 to one.
Cancellations run at 2.69%, against 1.89% nationally. That is about one flight in 40 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 stage length
What a delay here costs
10.4% of arrivals land a full hour or more behind schedule, against 8.3% nationally. Ninety minutes is the honest minimum for a connection here, and two hours if the onward flight is on a separate ticket.
At 315 miles this is a short hop, and stage length matters more than it looks. A flight this short spends under two hours in the air, which leaves almost nothing to claw back a late pushback with. Delay here is decided on the ground, in the turn, which is why the 5am–8am window matters as much as it does.
The return leg is a different operation and performs like one: it runs 73.9% on time across 1,151 flights, 3 points below this direction. Departure banks, aircraft rotations and the congestion at each end all differ, so scoring the two directions together would average away a real 3 points of difference.
The sample behind these figures is 1,152 flights, enough that the headline rate is stable to within roughly a point. The hour-block and month splits divide that further, so read the thinner bars with more caution than the headline.
What to do with this
Booking Envoy on COU to ORD
Put together: the calendar is the biggest lever here, not the carrier or the hour. February runs 86.1% on time and December 63.0%, a swing of 23 points. If the dates move at all, move them out of December before you think about anything else. 1,116 completed flights over 12 months sit behind that.
Related
Where to go next
Source: US DOT Bureau of Transportation Statistics, on-time performance data, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.