Carrier route record

MQORD→CHS

Envoy Air · Chicago to Charleston

Flights: 562
Period: July 2025 to June 2026
Share of route: 27%
Carriers: 6

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

Envoy on ORD to CHS sits in the middle of the pack with a C. Close to three flights in four arrive on time by the DOT's definition, 3 points worse than the national rate of 77.6%. The late ones land about 50 minutes behind schedule. That rests on 562 flights. The strongest carrier on the route with a full sample, Republic Airways, flew 454 at 81.1% on time.

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

On time

74.2%

Arrivals under 15 minutes late, of 546 completed flights

Avg delay

50 min

Across delayed arrivals only, not all flights

Cancelled

2.67%

National rate is 1.81%

Whole route

75.3%

Every carrier on ORD to CHS, 2,091 flights

These figures cover 562 flights between July 2025 and June 2026. The median arrival is 5 minutes early, which is the part an average hides: most flights here are fine, and the on-time rate is decided by a tail of badly late ones. On-time means under 15 minutes late, the DOT's own threshold.

Carrier by carrier

Envoy against every carrier on ORD to CHS

Envoy flew 562 of the 2,091 flights on ORD to CHS, about 27% of it. Its 74.2% on time is about level with the route as a whole at 75.3%. Ranked by on-time rate it is number three of six carriers on the route, where the range runs from PSA at 100.0% to SkyWest at 67.5%. Three 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 74.2%. Sample sizes sit next to every figure, because a two-point gap across 750 flights means less than a ten-point one.

On-time performance by carrier on ORD to CHS
Airline	Flights	On time	Avg delay	Cancelled	Grade
PSA Airlinesthin sample	1	100.0%	—	0.00%	A+
Republic Airways	454	81.1%	58 min	1.98%	B
Envoy Air (this page)	562	74.2%	50 min	2.67%	C
United Airlines	750	74.2%	71 min	1.60%	C
American Airlinesthin sample	239	73.1%	73 min	2.09%	C
SkyWest Airlinesthin sample	85	67.5%	71 min	2.35%	C

Republic leads United by 7 points. Real, but small enough that a better departure time on the weaker carrier can outweigh it.

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 7 points between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.

5am–8am—
8am–11am170 flights76.2%
11am–2pm70 flights83.8%
2pm–5pm162 flights75.9%
5pm–8pm36 flights58.8%
8pm–5am124 flights67.8%

Scale runs 50% to 90%. Rows with fewer than 30 flights show a dash.

The 5pm–8pm window is where this operation falls apart: 58.8% on time, against 83.8% for the 11am–2pm 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 8am–11am window is the busiest, with 170 flights scheduled in it.

Across the year

Envoy on ORD to CHS through the year

Darker means more delays. Figures are on-time percentages.August best, July worst

July is the worst month at 59.5% on time, 26 points below August, the best at 85.4%. Summer afternoon convection and peak-season schedules land on the same weeks every year, so this is a pattern you can book around rather than a run of bad luck. July was the busiest month here, with 78 flights.

Across the week, Tuesday is the strongest day at 81.3% on time and Sunday the weakest at 65.0%. 16 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 7,092 reported delay minutes.

Late-arriving aircraft
39%
National Airspace System
35%
Carrier
15%
Extreme weather
11%

39% 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 7,092 reported delay minutes here, that single category outweighs weather by 4 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 7,092 reported delay minutes.

35% 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 2,466 minutes out of 7,092, against a national NAS share of 21%.

Cancellations run at 2.67%, against 1.81% 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

7.0% 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 50 minutes, which a normal layover absorbs.

The 760 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 is a different operation and performs like one: it runs 80.1% on time across 562 flights, 6 points above 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 6 points of difference.

One caution: this is a thin sample. 562 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 CHS

Put together: treat all of this as provisional. 562 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 74.2% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 546 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