Carrier route record
YXIAD→CMH
Republic Airways · Washington to Columbus
- 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 IAD to CMH lands a B, 4 points better than the national rate of 77.3%. About one flight in five arrives 15 minutes late or worse, and those flights are late by a little over an hour on average. That rests on 527 flights, with a median arrival 10 minutes early.
Set against the rest of the country, Republic's IAD to CMH record is 4 points better than the US average of 77.3%. That gap is worth roughly 41 fewer late arrivals for every thousand flights.
Key figures
On time
81.4%
Arrivals under 15 minutes late, of 517 completed flights
Avg delay
77 min
Across delayed arrivals only, not all flights
Cancelled
1.90%
National rate is 1.89%
Whole route
82.1%
Every carrier on IAD to CMH, 936 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 IAD to CMH
Republic flew 527 of the 936 flights on IAD to CMH, most of the route. Its 81.4% on time is about level with the route as a whole at 82.1%. Ranked by on-time rate it is last of two carriers on the route, where the range runs from United at 83.0% to Republic at 81.4%.
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 |
|---|---|---|---|---|---|
| United Airlines | 409 | 83.0% | 69 min | 0.24% | B+ |
| Republic Airways (this page) | 527 | 81.4% | 77 min | 1.90% | B |
Flight by flight
Republic flight numbers on IAD to CMH
Timetable by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.
Departure window
When Republic runs best on this route
Departure time is the single lever a traveller controls, and it moves the odds more than most people expect. Each bar below is the on-time rate for flights scheduled to leave inside that window, across 527 flights.
- 5am–8am—
- 8am–11am31 flights—
- 11am–2pm83 flights84.3%
- 2pm–5pm22 flights—
- 5pm–8pm80 flights80.0%
- 8pm–5am311 flights81.5%
Scale runs 70% to 90%. Rows with fewer than 30 flights show a dash.
The 11am–2pm window is the strongest at 84.3% on time. The full set of windows spans 4 points.
Across the year
Republic on IAD to CMH through the year
April is the best month on the calendar at 93.3% on time. Shoulder season thins the schedule and takes the summer weather with it, and the operation gets its margin back. October was the busiest month here, with 74 flights.
Across the week, Tuesday is the strongest day at 88.0% on time and Monday the weakest at 70.7%, a spread of 17 points.
Arrival by arrival
How late Republic on IAD to CMH runs when it is late
Republic on IAD to CMH often beats the schedule: 193 of 517 completed flights, 37%, arrived 15 minutes or more early. The 96 late arrivals split 31 under half an hour, 26 between 30 and 60 minutes, and 39 an hour or more.
- 15+ min early193 flights37.3%
- Within 15 min228 flights44.1%
- 15–29 min late31 flights6.0%
- 30–59 min late26 flights5.0%
- 1–2 hours late23 flights4.4%
- 2+ hours late16 flights3.1%
Scale runs 0% to 100%.
Share of 517 completed flights by arrival against schedule.
13 of 77 late departures made up the time and arrived on time, 17% of them. In the other direction, 32 flights left on time yet arrived 15 minutes late or more, so that delay built up after pushback: in the air, in a holding pattern or on the ground at CMH.
The worst days
Worst days for Republic on IAD to CMH
The latest arrival of the period was on 4 September 2025, 14 hours 6 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. Three of the five worst days fell in June 2026.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 4 September 2025 | 14 hours 6 minutes | Late-arriving aircraft |
| 12 June 2026 | 12 hours 28 minutes | Carrier |
| 6 September 2025 | 3 hours 41 minutes | Carrier |
| 14 June 2026 | 3 hours 9 minutes | Late-arriving aircraft |
| 11 June 2026 | 3 hours 3 minutes | Late-arriving aircraft |
Delay causes
Why Republic runs late on this route
Late-arriving aircraft accounts for 52% of the 7,410 delay minutes carriers reported here, and the remaining four split what is left.
- 52%Late-arriving aircraft
- 33%Carrier
- 14%National Airspace System
- 1%Extreme weather
52% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 7,410 reported delay minutes here, that single category outweighs weather by 43 to one. The split is drawn from 7,410 reported delay minutes.
Cancellations sit at 1.90% against a national 1.89%, which is ordinary. Diversions add another 0.00%.
Connections and stage length
What a delay here costs
7.5% of arrivals land an hour or more late, close to the national 8.3%, so 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 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 11am–2pm window matters as much as it does.
The return leg is a different operation and performs like one: it runs 89.7% on time across 527 flights, 8 points above 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 IAD to CMH
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 81.4% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 517 completed flights over 12 months sit behind that.
Related
Where to go next
- IAD to CMH, every carrier
- Republic on CMH to IAD, the return leg
- United Airlines on IAD to CMH83.0%
- Republic Airways network-wide record
- Washington Dulles International (IAD) delay statistics
- John Glenn Columbus International (CMH) delay statistics
- Why the first flight of the morning is statistically safest
- Worst months to fly in the US, ranked by the data
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.