Carrier route record

YXRDU→IAD

Republic Airways · Raleigh to Washington

Flights: 213
Period: July 2025 to June 2026
Share of route: 16%
Carriers: 2

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

Republic on RDU 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 213 flights, with a median arrival 8 minutes early.

Set against the rest of the country, Republic's RDU to IAD record is 4 points better than the US average of 77.6%. That gap is worth roughly 40 fewer late arrivals for every thousand flights.

On time

81.6%

Arrivals under 15 minutes late, of 212 completed flights

Avg delay

74 min

Across delayed arrivals only, not all flights

Cancelled

0.47%

National rate is 1.81%

Whole route

86.5%

Every carrier on RDU to IAD, 1,293 flights

These figures cover 213 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 RDU to IAD

Republic flew 213 of the 1,293 flights on RDU to IAD, about 16% of it. Its 81.6% on time is 5 points worse than the route as a whole, which runs 86.5%. Ranked by on-time rate it is last of two carriers on the route, where the range runs from United at 87.5% to Republic at 81.6%.

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 RDU to IAD
Airline	Flights	On time	Avg delay	Cancelled	Grade
United Airlines	1,080	87.5%	81 min	1.39%	A
Republic Airways (this page)thin sample	213	81.6%	74 min	0.47%	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–8am99 flights86.7%
8am–11am—
11am–2pm—
2pm–5pm34 flights88.2%
5pm–8pm53 flights71.7%
8pm–5am27 flights—

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

The best window here is not the first bank but the 2pm–5pm slot at 88.2% on time, ahead of 5pm–8pm at 71.7%. Where the curve peaks mid-day rather than at dawn, the constraint is usually congestion at one end rather than the aircraft's own rotation. The 5am–8am window is the busiest, with 99 flights scheduled in it.

Across the year

Republic on RDU to IAD through the year

Jul–Sep 202591 flights84.4%
Oct–Dec 202567 flights85.1%
Jan–Mar 202614 flights—
Apr–Jun 202641 flights68.3%

Scale runs 60% 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 81.6% on time across 213 flights.

Republic on RDU to IAD did not run the same all year. Its best quarter was Oct–Dec 2025 at 85.1% on time and its weakest Apr–Jun 2026 at 68.3%, a swing of 17 points on roughly 71 flights a quarter. The twelve-month rate averages over that, so if you are flying in a weak quarter the quarter's own figure is the better guide.

Across the week, Saturday is the strongest day at 91.7% on time and Friday the weakest at 69.7%. 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 61% of the 2,892 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
61%
Carrier
21%
National Airspace System
18%

61% 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 2,892 reported delay minutes here, that single category outweighs weather by 61 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 2,892 reported delay minutes.

Cancellations are rare at 0.47%, below the national 1.81% and low enough to earn the plus on the grade. Roughly one flight in 100 is called off; the risk here is arriving late, not not arriving.

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.

At 225 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 2pm–5pm window matters as much as it does.

The return leg runs 80.4% on time across 213 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. 213 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 RDU to IAD

Put together: treat all of this as provisional. 213 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 81.6% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 212 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