Carrier route record

MQCHA→ORD

Envoy Air · Chattanooga to Chicago

Flights: 205
Period: July 2025 to June 2026
Share of route: 22%
Carriers: 3

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

Envoy on CHA to ORD 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 about an hour behind schedule. That rests on 205 flights, with a median arrival 9 minutes early.

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

On time

75.4%

Arrivals under 15 minutes late, of 199 completed flights

Avg delay

58 min

Across delayed arrivals only, not all flights

Cancelled

2.44%

National rate is 1.81%

Whole route

70.2%

Every carrier on CHA to ORD, 953 flights

These figures cover 205 flights between July 2025 and June 2026. Beyond the headline rate, 8.5% 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 CHA to ORD

Envoy flew 205 of the 953 flights on CHA to ORD, about 22% of it. Its 75.4% on time is 5 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 75.4% to Republic at 66.8%. 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 CHA to ORD
Airline	Flights	On time	Avg delay	Cancelled	Grade
Envoy Air (this page)thin sample	205	75.4%	58 min	2.44%	B
SkyWest Airlines	510	69.7%	85 min	5.10%	C−
Republic Airwaysthin sample	238	66.8%	63 min	3.36%	C−

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 26 points, against half a point between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.

5am–8am66 flights89.4%
8am–11am54 flights75.9%
11am–2pm—
2pm–5pm—
5pm–8pm85 flights63.3%
8pm–5am—

Scale runs 55% to 95%. Rows with fewer than 30 flights show a dash.

The 5pm–8pm window is where this operation falls apart: 63.3% on time, against 89.4% 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 5pm–8pm window is the busiest, with 85 flights scheduled in it.

Across the year

Envoy on CHA to ORD through the year

Oct–Dec 20259 flights—
Jan–Mar 202681 flights71.6%
Apr–Jun 2026115 flights78.0%

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 75.4% on time across 205 flights.

Split by quarter, Envoy on CHA to ORD logged 9 flights in Oct–Dec 2025, 81 flights in Jan–Mar 2026 and 115 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 75.4% annual figure is the one to use.

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 2,836 reported delay minutes.

National Airspace System
36%
Late-arriving aircraft
36%
Carrier
23%
Extreme weather
5%
Security
0%

36% 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 2,836 reported delay minutes here, that single category outweighs weather by 7 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 2,836 reported delay minutes.

36% 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 1,014 minutes out of 2,836, against a national NAS share of 21%.

Cancellations sit at 2.44% against a national 1.81%, which is ordinary. Diversions add another 0.49%.

Connections and stage length

What a delay here costs

8.5% of arrivals land an hour or more late, close to the national 8.1%. That is the figure that decides a connection, and it says a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last about an hour, which a normal layover absorbs.

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 77.3% 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 CHA to ORD

Put together: treat all of this as provisional. 205 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 75.4% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 199 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