Carrier route record

UAEWR→CHS

United Airlines · Newark to Charleston

Flights: 802
Period: July 2025 to June 2026
Share of route: 59%
Carriers: 3

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

United on EWR to CHS lands a B, 4 points better than the national rate of 77.6%. Roughly one flight in five 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 802 flights, with a median arrival 10 minutes early.

Set against the rest of the country, United's EWR to CHS record is 4 points better than the US average of 77.6%. That gap is worth roughly 41 fewer late arrivals for every thousand flights.

On time

81.7%

Arrivals under 15 minutes late, of 789 completed flights

Avg delay

77 min

Across delayed arrivals only, not all flights

Cancelled

1.50%

National rate is 1.81%

Whole route

79.8%

Every carrier on EWR to CHS, 1,362 flights

These figures cover 802 flights between July 2025 and June 2026. The median arrival is 10 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

United against every carrier on EWR to CHS

United flew 802 of the 1,362 flights on EWR to CHS, most of the route. Its 81.7% on time is 2 points better than the route as a whole, which runs 79.8%. Ranked by on-time rate it is first of three carriers on the route, where the range runs from United at 81.7% to Spirit at 73.3%. Two 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 EWR to CHS
Airline	Flights	On time	Avg delay	Cancelled	Grade
United Airlines (this page)	802	81.7%	77 min	1.50%	B
Republic Airwaysthin sample	285	80.2%	81 min	7.37%	B−
Spirit Airlinesthin sample	275	73.3%	65 min	6.18%	C−

Departure window

When United runs best on this route

Departure time matters more here than the choice of carrier. The gap between the best and worst window is 21 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–8am314 flights91.6%
8am–11am—
11am–2pm34 flights88.2%
2pm–5pm159 flights82.2%
5pm–8pm16 flights—
8pm–5am279 flights71.0%

Scale runs 65% to 95%. Rows with fewer than 30 flights show a dash.

Book the early departure. Flights leaving between 5am–8am arrive on time 91.6% of the time, against 71.0% for the overnight window. That is 21 points of difference for no extra money, and it comes from the same aircraft having had no earlier flight to fall behind on. The 5am–8am window is the busiest, with 314 flights scheduled in it.

Across the year

United on EWR to CHS through the year

Darker means more delays. Figures are on-time percentages.September best, October worst

September is the best month on the calendar at 92.1% on time. Shoulder season thins the schedule and takes the summer weather with it, and the operation gets its margin back. November was the busiest month here, with 88 flights.

Across the week, Tuesday is the strongest day at 87.9% on time and Sunday the weakest at 71.7%. 16 points is a smaller lever than departure hour, but it is free.

Delay causes

Why United runs late on this route

One category carries most of the weight here. Late-arriving aircraft accounts for 43% of the 11,000 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
43%
Carrier
37%
National Airspace System
14%
Extreme weather
6%

43% 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 11,000 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 11,042 reported delay minutes.

The largest share of delay minutes, 37%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. Unlike weather, that is a management outcome, and it is the category where the gap between two carriers on the same schedule is genuinely earned. It accounts for 4,042 of the 11,000 delay minutes reported here.

Cancellations sit at 1.50% against a national 1.81%, which is ordinary. Diversions add another 0.12%.

Connections and stage length

What a delay here costs

7.5% 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 a little over an hour, which a normal layover absorbs.

The 628 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 83.4% on time across 804 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. 802 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 United on EWR to CHS

Put together: treat all of this as provisional. 802 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 81.7% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 789 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