Carrier route record

YXCHS→IAD

Republic Airways · Charleston to Washington

Flights: 300
Period: July 2025 to June 2026
Share of route: 40%
Carriers: 2

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

Republic on CHS to IAD 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 300 flights, with a median arrival 8 minutes early.

Set against the rest of the country, Republic's CHS to IAD record is 4 points better than the US average of 77.6%. That gap is worth roughly 42 fewer late arrivals for every thousand flights.

On time

81.8%

Arrivals under 15 minutes late, of 292 completed flights

Avg delay

77 min

Across delayed arrivals only, not all flights

Cancelled

2.33%

National rate is 1.81%

Whole route

84.8%

Every carrier on CHS to IAD, 759 flights

These figures cover 300 flights between July 2025 and June 2026. The median arrival is 8 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

Republic against every carrier on CHS to IAD

Republic flew 300 of the 759 flights on CHS to IAD, about 40% of it. Its 81.8% on time is 3 points worse than the route as a whole, which runs 84.8%. Ranked by on-time rate it is last of two carriers on the route, where the range runs from United at 86.6% to Republic at 81.8%.

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 CHS to IAD
Airline	Flights	On time	Avg delay	Cancelled	Grade
United Airlines	459	86.6%	97 min	0.65%	A+
Republic Airways (this page)thin sample	300	81.8%	77 min	2.33%	B

Departure window

When Republic runs best on this route

Departure time matters more here than the choice of carrier. The gap between the best and worst window is 17 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–8am2 flights—
8am–11am38 flights92.1%
11am–2pm—
2pm–5pm177 flights82.3%
5pm–8pm83 flights75.3%
8pm–5am—

Scale runs 65% to 100%. Rows with fewer than 30 flights show a dash.

Book the morning departure. Flights leaving between 8am–11am arrive on time 92.1% of the time, against 75.3% for the evening window. That is 17 points of difference for no extra money, and it comes from the same aircraft having had no earlier flight to fall behind on. The 2pm–5pm window is the busiest, with 177 flights scheduled in it.

Across the year

Republic on CHS to IAD through the year

Jul–Sep 202598 flights82.1%
Oct–Dec 202569 flights76.5%
Jan–Mar 202677 flights83.6%
Apr–Jun 202656 flights85.7%

Scale runs 70% to 90%. 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 81.8% on time across 300 flights.

Quarter by quarter Republic on CHS to IAD held fairly steady: 82.1% in Jul–Sep 2025, 76.5% in Oct–Dec 2025, 83.6% in Jan–Mar 2026 and 85.7% in Apr–Jun 2026. A spread of 9 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Across the week, Saturday is the strongest day at 88.1% on time and Sunday the weakest at 65.8%. 22 points is a smaller lever than departure hour, but it is free.

Delay causes

Why Republic runs late on this route

One category carries most of the weight here. Late-arriving aircraft accounts for 62% of the 4,095 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
62%
National Airspace System
21%
Carrier
14%
Extreme weather
3%

62% 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 4,095 reported delay minutes here, that single category outweighs weather by 20 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 4,095 reported delay minutes.

The practical consequence: the 8am–11am departure is the one that starts clean. Its aircraft has no earlier leg to be late from, which is exactly why that window shows 92.1% on time here.

Cancellations sit at 2.33% against a national 1.81%, which is ordinary. Diversions add another 0.33%.

Connections and stage length

What a delay here costs

7.9% 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.

At 442 miles this is a short hop, and stage length matters more than it looks. A flight this short spends under two hours in the air, which leaves almost nothing to claw back a late pushback with. Delay here is decided on the ground, in the turn, which is why the 8am–11am window matters as much as it does.

The return leg runs 82.6% on time across 298 flights, within about a point 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. 300 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 Republic on CHS to IAD

Put together: treat all of this as provisional. 300 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 81.8% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 292 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