Carrier route record

MQORD→CHA

Envoy Air · Chicago to Chattanooga

Flights: 205
Period: July 2025 to June 2026
Share of route: 21%
Carriers: 3

Historical statistics for July 2025 to June 2026, not live status. For today’s flights, check with Envoy Air.

Envoy on ORD to CHA lands a B−, level with the national rate of 77.6%. Roughly one flight in four arrives 15 minutes late or worse, and those flights are late by a little over an hour on average. That is a workable record, not a spotless one. That rests on 205 flights, with a median arrival 11 minutes early.

The US average over the same twelve months is 77.6%, so there is little to separate Envoy on ORD to CHA from the country as a whole. The variation that matters here is internal: which carrier, and what time of day.

On time

77.3%

Arrivals under 15 minutes late, of 198 completed flights

Avg delay

78 min

Across delayed arrivals only, not all flights

Cancelled

3.41%

National rate is 1.81%

Whole route

70.2%

Every carrier on ORD to CHA, 954 flights

These figures cover 205 flights between July 2025 and June 2026. Beyond the headline rate, 11.6% 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 ORD to CHA

Envoy flew 205 of the 954 flights on ORD to CHA, about 21% of it. Its 77.3% on time is 7 points better than the route as a whole, which runs 70.2%. Ranked by on-time rate it is first of three carriers on the route, where the range runs from Envoy at 77.3% to Republic at 66.7%. One of those carriers flew fewer than 365 flights here, so treat their positions as rough.

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.

On-time performance by carrier on ORD to CHA
Airline	Flights	On time	Avg delay	Cancelled	Grade
Envoy Air (this page)thin sample	205	77.3%	78 min	3.41%	B−
SkyWest Airlines	510	69.0%	78 min	5.29%	C−
Republic Airwaysthin sample	239	66.7%	83 min	4.60%	C−

Departure window

When Envoy runs best on this route

Departure time is the single lever a traveller controls, and it moves the odds more than most people expect. Each bar below is the on-time rate for flights scheduled to leave inside that window, across 205 flights.

5am–8am—
8am–11am—
11am–2pm—
2pm–5pm85 flights79.5%
5pm–8pm97 flights76.6%
8pm–5am23 flights—

Scale runs 70% to 85%. Rows with fewer than 30 flights show a dash.

The 2pm–5pm window is the strongest at 79.5% on time. The full set of windows spans 3 points.

Across the year

Envoy on ORD to CHA through the year

Oct–Dec 202510 flights—
Jan–Mar 202681 flights71.6%
Apr–Jun 2026114 flights81.3%

Scale runs 65% to 85%. Rows with fewer than 30 flights show a dash.

Monthly volumes are too low here to break the year into twelve reliable readings. What the twelve-month total says is 77.3% on time across 205 flights.

Split by quarter, Envoy on ORD to CHA logged 10 flights in Oct–Dec 2025, 81 flights in Jan–Mar 2026 and 114 flights in Apr–Jun 2026. Fewer than three of those quarters carried the 30 completed flights this site needs before printing a rate, so the 77.3% annual figure is the one to use.

Delay causes

Why Envoy runs late on this route

One category carries most of the weight here. Late-arriving aircraft accounts for 50% of the 3,516 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.

Late-arriving aircraft
50%
Extreme weather
24%
National Airspace System
15%
Carrier
11%

Extreme weather accounts for 24% 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 3.9 times the usual weather exposure. The split is drawn from 3,516 reported delay minutes.

50% 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 3,516 reported delay minutes here, that single category outweighs weather by 2 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.

Cancellations run at 3.41%, against 1.81% nationally. That is about one flight in 30 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

For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 11.6% 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 501 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 75.4% on time across 205 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. 205 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 ORD to CHA

Put together: the delay figures matter less here than the 3.41% cancellation rate. A late arrival costs you a little over an hour; a cancelled flight costs you the day. Book the 2pm–5pm departure so there is still a schedule behind you if it goes wrong, and treat a same-day connection as optimistic. 198 completed flights over 12 months sit behind that.

Where to go next

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.

Key figures