Carrier route record
YXCMH→IAD
Republic Airways · Columbus to Washington
- Flights
- 527
- Period
- September 2025 to August 2026
- Share of route
- 56%
- Carriers
- 2
Historical statistics for September 2025 to August 2026, not live status. For today’s flights, check with Republic Airways.
Republic on CMH to IAD earns an A+. Close to nine flights in ten arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 12 points better than the national rate of 77.3%. When something does go wrong the average delay runs about an hour. That rests on 527 flights, with a median arrival 10 minutes early.
Set against the rest of the country, Republic's CMH to IAD record is 12 points better than the US average of 77.3%. That gap is worth roughly 124 fewer late arrivals for every thousand flights.
Key figures
On time
89.7%
Arrivals under 15 minutes late, of 522 completed flights
Avg delay
61 min
Across delayed arrivals only, not all flights
Cancelled
0.95%
National rate is 1.89%
Whole route
84.9%
Every carrier on CMH to IAD, 935 flights
These figures cover 527 flights between September 2025 and August 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.
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Carrier by carrier
Republic against every carrier on CMH to IAD
Republic flew 527 of the 935 flights on CMH to IAD, most of the route. Its 89.7% on time is 5 points better than the route as a whole, which runs 84.9%. Ranked by on-time rate it is first of two carriers on the route, where the range runs from Republic at 89.7% to United at 78.8%.
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.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| Republic Airways (this page) | 527 | 89.7% | 61 min | 0.95% | A+ |
| United Airlines | 408 | 78.8% | 91 min | 0.74% | B+ |
Flight by flight
Republic flight numbers on CMH to IAD
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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 19 points, against half a point between the best and worst carrier.
- 5am–8am312 flights94.5%
- 8am–11am31 flights86.7%
- 11am–2pm22 flights—
- 2pm–5pm83 flights75.9%
- 5pm–8pm28 flights—
- 8pm–5am51 flights86.0%
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 94.5% of the time, against 75.9% for the afternoon window. That is 19 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 312 flights scheduled in it.
Across the year
Republic on CMH to IAD through the year
December is the weak month at 80.0% on time, against 100.0% in April. Winter delays cluster: a single storm system can account for most of a month's shortfall, so an average December hides both very good weeks and genuinely unflyable days. October was the busiest month here, with 74 flights.
Across the week, Saturday is the strongest day at 95.2% on time and Monday the weakest at 81.6%, a spread of 14 points.
Arrival by arrival
How late Republic on CMH to IAD runs when it is late
Republic on CMH to IAD often beats the schedule: 170 of 522 completed flights, 33%, arrived 15 minutes or more early. The 54 late arrivals split 22 under half an hour, 13 between 30 and 60 minutes, and 19 an hour or more.
- 15+ min early170 flights32.6%
- Within 15 min298 flights57.1%
- 15–29 min late22 flights4.2%
- 30–59 min late13 flights2.5%
- 1–2 hours late11 flights2.1%
- 2+ hours late8 flights1.5%
Scale runs 0% to 100%.
Share of 522 completed flights by arrival against schedule.
13 of 51 late departures made up the time and arrived on time, 25% of them. 16 flights left on time and still arrived late.
The worst days
Worst days for Republic on CMH to IAD
The latest arrival of the period was on 20 October 2025, 3 hours 39 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). Three of the five worst days fell in June 2026.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 20 October 2025 | 3 hours 39 minutes | Carrier |
| 13 June 2026 | 3 hours 37 minutes | Late-arriving aircraft |
| 12 June 2026 | 3 hours 25 minutes | Carrier |
| 29 December 2025 | 2 hours 29 minutes | Late-arriving aircraft |
| 10 June 2026 | 2 hours 21 minutes | National Airspace System |
Delay causes
Why Republic 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 3,310 reported delay minutes.
- 39%Carrier
- 39%Late-arriving aircraft
- 22%National Airspace System
- 1%Extreme weather
39% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 3,310 reported delay minutes here, that single category outweighs weather by 32 to one. The split is drawn from 3,310 reported delay minutes.
The largest share of delay minutes, 39%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 1,281 of the 3,310 delay minutes reported here.
Cancellations sit at 0.95% against a national 1.89%, which is ordinary. Diversions add another 0.00%.
Connections and stage length
What a delay here costs
Badly late arrivals are rare here: only 3.6% land an hour or more behind schedule, against 8.3% 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 81.4% on time across 527 flights, 8 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 8 points of difference.
One caution: this is a thin sample. 527 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. 527 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 89.7% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 522 completed flights over 12 months sit behind that.
Related
Where to go next
- CMH to IAD, every carrier
- Republic on IAD to CMH, the return leg
- United Airlines on CMH to IAD78.8%
- Republic Airways network-wide record
- John Glenn Columbus International (CMH) delay statistics
- Washington Dulles International (IAD) delay statistics
- Why the first flight of the morning is statistically safest
- The best time of day to fly, according to 7.05 million flight records
Source: US DOT Bureau of Transportation Statistics, on-time performance data, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.