Carrier route record
MQROC→ORD
Envoy Air · Rochester to Chicago
- Flights
- 813
- Period
- July 2025 to June 2026
- Share of route
- 35%
- Carriers
- 4
Historical statistics for July 2025 to June 2026, not live status. For today’s flights, check with Envoy Air.
Envoy on ROC to ORD lands a B, level with the national rate of 77.6%. Roughly one flight in five arrives 15 minutes late or worse, and those flights are late by an hour and a half on average. That is a workable record, not a spotless one. That rests on 813 flights. The strongest carrier on the route with a full sample, Republic Airways, flew 711 at 81.1% on time.
The US average over the same twelve months is 77.6%, so there is little to separate Envoy on ROC 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
77.8%
Arrivals under 15 minutes late, of 793 completed flights
Avg delay
87 min
Across delayed arrivals only, not all flights
Cancelled
2.21%
National rate is 1.81%
Whole route
74.7%
Every carrier on ROC to ORD, 2,340 flights
These figures cover 813 flights between July 2025 and June 2026. Beyond the headline rate, 9.0% 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.
Carrier by carrier
Envoy against every carrier on ROC to ORD
Envoy flew 813 of the 2,340 flights on ROC to ORD, about 35% of it. Its 77.8% on time is 3 points better than the route as a whole, which runs 74.7%. Ranked by on-time rate it is number two of four carriers on the route, where the range runs from Republic at 81.1% to SkyWest at 62.4%. One of those carriers flew fewer than 365 flights here, so treat their positions as rough.
The choice of carrier is not cosmetic here. Republic Airways arrives on time 81.1% of the time; United Airlines manages 67.6%. Sample sizes sit next to every figure, because a two-point gap across 591 flights means less than a ten-point one.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| Republic Airways | 711 | 81.1% | 86 min | 2.39% | B |
| Envoy Air (this page) | 813 | 77.8% | 87 min | 2.21% | B |
| United Airlines | 591 | 67.6% | 85 min | 1.35% | C |
| SkyWest Airlinesthin sample | 225 | 62.4% | 133 min | 3.11% | D− |
The spread between Republic and United is 14 points, wide enough that it should decide the booking. On a hundred trips that is 14 more arrivals inside the on-time window.
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 29 points, against 14 points between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.
- 5am–8am196 flights91.2%
- 8am–11am—
- 11am–2pm280 flights80.1%
- 2pm–5pm94 flights75.0%
- 5pm–8pm213 flights62.0%
- 8pm–5am30 flights—
Scale runs 55% to 95%. Rows with fewer than 30 flights show a dash.
The 5pm–8pm window is where this operation falls apart: 62.0% on time, against 91.2% 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 11am–2pm window is the busiest, with 280 flights scheduled in it.
Across the year
Envoy on ROC to ORD through the year
December is the weak month at 64.4% on time, against 95.0% in June. 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. April was the busiest month here, with 110 flights.
Across the week, Tuesday is the strongest day at 81.8% on time and Wednesday the weakest at 67.8%. 14 points is a smaller lever than departure hour, but it is free.
Delay causes
Why Envoy runs late on this route
Carriers report a reason for every delay minute they cause, in five DOT categories. The split below is by minutes, not by number of flights, so a handful of very long weather delays weighs as much as many short ones. It covers 15,000 reported delay minutes.
- 42%Late-arriving aircraft
- 34%National Airspace System
- 20%Carrier
- 5%Extreme weather
- 0%Security
42% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. That is a cascade, and cascades start small and grow through the day. Across 15,000 reported delay minutes here, that single category outweighs weather by 9 to one. It is the strongest argument for booking the first departure of the morning, when the aircraft has been sitting at the gate overnight with nothing to inherit. The split is drawn from 15,259 reported delay minutes.
34% of delay minutes are charged to the National Airspace System: air traffic volume, runway configuration, ground stops. No carrier can price its way out of that, which is why airport choice moves the number here more than carrier choice does. That is 5,145 minutes out of 15,000, against a national NAS share of 21%.
Cancellations sit at 2.21% against a national 1.81%, which is ordinary. Diversions add another 0.25%.
Connections and stage length
What a delay here costs
For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 9.0% 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 528 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 return leg runs 80.1% on time across 813 flights, within 2 points of this direction. The two legs are scored separately because they usually differ; on this city pair they happen not to.
One caution: this is a thin sample. 813 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 Envoy on ROC to ORD
Put together: treat all of this as provisional. 813 flights over twelve months is enough to clear this site's floor and not enough to be confident to better than a couple of points. The 77.8% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 793 completed flights over 12 months sit behind that.
Related
Where to go next
- ROC to ORD, every carrier
- Envoy on ORD to ROC, the return leg
- Republic Airways on ROC to ORD81.1%
- United Airlines on ROC to ORD67.6%
- SkyWest Airlines on ROC to ORD62.4%
- Envoy Air network-wide record
- Chicago O'Hare International (ORD) delay statistics
- Why the first flight of the morning is statistically safest
- Same route, different airline: where the carrier you pick matters most
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.