Carrier route record

YXCMH→IAD

Republic Airways · Columbus to Washington

Flights: 673
Period: July 2025 to June 2026
Share of route: 63%
Carriers: 2

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

Republic on CMH to IAD earns an A. More than four flights in five arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 9 points better than the national rate of 77.6%. When something does go wrong the average delay runs a little over an hour. That rests on 673 flights, with a median arrival 8 minutes early.

Set against the rest of the country, Republic's CMH to IAD record is 9 points better than the US average of 77.6%. That gap is worth roughly 93 fewer late arrivals for every thousand flights.

On time

86.9%

Arrivals under 15 minutes late, of 659 completed flights

Avg delay

73 min

Across delayed arrivals only, not all flights

Cancelled

2.08%

National rate is 1.81%

Whole route

84.3%

Every carrier on CMH to IAD, 1,061 flights

These figures cover 673 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 CMH to IAD

Republic flew 673 of the 1,061 flights on CMH to IAD, most of the route. Its 86.9% on time is 3 points better than the route as a whole, which runs 84.3%. Ranked by on-time rate it is first of two carriers on the route, where the range runs from Republic at 86.9% to United at 79.7%.

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 CMH to IAD
Airline	Flights	On time	Avg delay	Cancelled	Grade
Republic Airways (this page)	673	86.9%	73 min	2.08%	A
United Airlines	388	79.7%	87 min	0.77%	B+

Flight by flight

Republic flight numbers on CMH to IAD

YX 343006:0094.6% · 321 flights

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 23 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–8am348 flights94.2%
8am–11am42 flights87.8%
11am–2pm22 flights—
2pm–5pm123 flights71.7%
5pm–8pm77 flights73.6%
8pm–5am61 flights86.7%

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

Book the early departure. Flights leaving between 5am–8am arrive on time 94.2% of the time, against 71.7% for the afternoon window. That is 23 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 348 flights scheduled in it.

Across the year

Republic on CMH to IAD through the year

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

July is the worst month at 74.0% on time, 26 points below April, the best at 100.0%. 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. August was the busiest month here, with 87 flights.

Across the week, Thursday is the strongest day at 93.9% on time and Monday the weakest at 80.6%. 13 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 44% of the 6,256 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
44%
Carrier
35%
National Airspace System
16%
Extreme weather
5%

44% 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 6,256 reported delay minutes here, that single category outweighs weather by 8 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 6,256 reported delay minutes.

The largest share of delay minutes, 35%, 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 2,199 of the 6,256 delay minutes reported here.

Cancellations sit at 2.08% against a national 1.81%, which is ordinary. Diversions add another 0.00%.

Connections and stage length

What a delay here costs

Badly late arrivals are rare here: only 4.9% land an hour or more behind schedule, against 8.1% nationally. Connections built on this flight are about as safe as US domestic connections get, though a cancelled flight still ignores every layover you give it.

At 299 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 5am–8am window matters as much as it does.

The return leg is a different operation and performs like one: it runs 80.4% on time across 672 flights, 7 points below 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 7 points of difference.

One caution: this is a thin sample. 673 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 CMH to IAD

Put together: treat all of this as provisional. 673 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 86.9% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 659 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