Carrier performance at one airport
YX→CMH
Republic Airways at John Glenn Columbus International
- Departures
- 12,935
- Period
- June 2025 to May 2026
- Routes
- 9
- Rank here
- #2 of 11
Republic Airways at Columbus lands a B−, 4 points better than the national rate of 77.4%. Roughly one flight in five arrive 15 minutes late or worse, and those flights are late by about an hour on average. That is a workable record, not a spotless one. That rests on 12,935 flights, of which Delta Air Lines flew 3,741 at 87.1% on time.
Measured against the airport rather than the country, Republic Airways runs 2 points ahead of the 79.6% weighted average across all carriers at CMH. That is the comparison worth making: every operator here works the same runways, the same airspace and the same weather.
Key figures
On time
81.5%
12,502 completed departures
Avg delay
66 min
Across delayed flights only
Cancelled
3.16%
At CMH, this carrier only
Rank here
#2
Of 11 carriers clearing the floor at CMH
These figures cover 13,000 flights between June 2025 and May 2026. The median arrival is 9 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.
Against the competition
Every carrier at CMH, ranked
The choice of carrier is not cosmetic here. Delta Air Lines arrives on time 87.1% of the time; Frontier Airlines manages 65.7%. Sample sizes sit next to every figure, because a two-point gap across 477 flights means less than a ten-point one.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| Delta Air Lines | 3,741 | 87.1% | 84 min | 1.55% | A |
| Republic Airways (this page) | 12,935 | 81.5% | 66 min | 3.16% | B− |
| Southwest Airlines | 12,353 | 80.6% | 60 min | 1.02% | B |
| American Airlines | 4,107 | 79.9% | 105 min | 2.61% | B |
| Envoy Air | 3,087 | 78.9% | 82 min | 0.97% | B+ |
| Spirit Airlines | 1,372 | 74.8% | 80 min | 3.72% | C− |
| United Airlines | 3,267 | 72.6% | 80 min | 1.10% | C |
| PSA Airlines | 1,618 | 72.2% | 94 min | 4.26% | C− |
| SkyWest Airlines | 1,272 | 70.9% | 111 min | 3.07% | C− |
| Alaska Airlines | 463 | 69.6% | 49 min | 1.30% | C |
| Frontier Airlines | 477 | 65.7% | 83 min | 2.73% | C |
PSA Airlines cancels 4.3% of what it schedules here, the highest in the table. A cancelled flight never appears in an on-time rate, so read that column alongside the punctuality one rather than after it.
Route by route
Where Republic Airways flies from CMH
Republic Airways operates 9 routes out of CMH with enough volume to report. Route records inside one carrier at one airport still spread widely, because a short shuttle and a transcontinental have very different exposure to a late inbound.
| Route | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| CMH to LGA · New York | 2,877 | 78.8% | 73 min | 4.76% | B− |
| CMH to EWR · Newark | 1,959 | 81.6% | 63 min | 4.13% | B− |
| CMH to BOS · Boston | 1,918 | 82.7% | 63 min | 2.19% | B |
| CMH to JFK · New York | 1,668 | 82.7% | 66 min | 3.54% | B− |
| CMH to ORD · Chicago | 1,470 | 83.9% | 68 min | 1.90% | B |
| CMH to DCA · Washington | 909 | 66.6% | 56 min | 4.07% | C− |
| CMH to DTW · Detroit | 827 | 89.6% | 69 min | 0.36% | A+ |
| CMH to IAD · Washington | 716 | 85.7% | 74 min | 2.09% | A |
| CMH to PHL · Philadelphia | 560 | 87.3% | 59 min | 1.25% | A |
Departure window
Best time of day for this operation
Departure time matters more here than the choice of carrier. The gap between the best and worst window is 21 points, against 21 points between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.
- 5am–8am3,416 flights90.7%
- 8am–11am2,637 flights86.7%
- 11am–2pm3,004 flights80.0%
- 2pm–5pm1,402 flights69.7%
- 5pm–8pm2,284 flights70.2%
- 8pm–5am192 flights80.9%
Scale runs 60% to 95%. Rows with fewer than 30 flights show a dash.
Book the early departure. Flights leaving between 5am–8am arrive on time 90.7% of the time, against 69.7% for the afternoon window. That is 21 points of difference for no extra money, and it comes from the same aircraft having had no earlier flight to fall behind on.
Across the year
Seasonal pattern
December is the weak month at 70.6% on time, against 88.7% in May. 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.
Delay causes
What holds this operation up
- 45%National Airspace System
- 27%Late-arriving aircraft
- 25%Carrier
- 3%Extreme weather
- 0%Security
45% of delay minutes are charged to the National Airspace System: air traffic volume, runway configuration, ground stops. No carrier can price its way out of that, which is why airport choice moves the number here more than carrier choice does. That is 68,000 minutes out of 152,000, against a national NAS share of 21%.
Cancellations run at 3.16%, against 1.80% nationally. That is about one flight in 30 cancelled outright. A cancelled flight is invisible in every on-time figure on this page, so the punctuality numbers above describe only the flights that actually operated.
7.0% of arrivals land an hour or more late, close to the national 8.2%. 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 are the about an hour kind, which a normal layover absorbs.
12,935 flights sit behind these numbers, which is a large enough sample that the headline rate is not moving on noise. Where a sub-group falls below 30 flights the site shows a dash instead of a percentage.
Put together: the delay figures matter less here than the 3.16% cancellation rate. A late arrival costs you about an hour; a cancelled flight costs you the day. Book the 5am–8am departure so there is still a schedule behind you if it goes wrong, and treat a same-day connection as optimistic.
Common questions
Republic Airways at CMH
How often is Republic Airways at CMH delayed?
Roughly one flight in five arrive at least 15 minutes late, which is the Department of Transportation's definition of a delayed arrival. That works out to 18.5% of the 12,935 flights in this analysis, against 22.6% nationally. Delayed flights are late by about an hour on average.
Which airline is most reliable on Republic Airways at CMH?
Delta Air Lines leads at 87.1% on time across 3,741 flights. Frontier Airlines is at the other end on 65.7%, a gap of 21 points. Sample size matters as much as the percentage: a rate built from a few hundred flights moves around far more than one built from ten thousand.
What time of day has the fewest delays on Republic Airways at CMH?
The 5am–8am departure window is the strongest at 90.7% on time. The 2pm–5pm window is the weakest at 69.7%, 21 points behind. Later departures inherit delays from earlier flights the same aircraft has already flown, which is why the curve slopes the way it does.
How bad are December delays on Republic Airways at CMH?
December is the weakest month at 70.6% on time, compared with 88.7% in May. Across the year that is 18 points between the best and worst months. Moving flexible dates out of that month is one of the few things that reliably helps.
Related
Where to go next
Source: US DOT Bureau of Transportation Statistics, on-time performance data, June 2025 to May 2026. Updated monthly. How this data is collected.