Carrier performance at one airport
YX→CMH
Republic Airways at John Glenn Columbus International
- Departures
- 13,053
- Period
- September 2025 to August 2026
- Routes
- 9
- Rank here
- #3 of 11
Republic Airways at Columbus carries a cancellation problem, not just a delay problem: 3.5% of scheduled flights never operate, against 1.9% nationally. Of the ones that do fly, more than four flights in five arrive on time, worth a B− overall. The punctuality figure counts only flights that actually departed, so it flatters an operation that cancels this often. That rests on 13,053 flights, of which Delta Air Lines flew 3,730 at 87.1% on time.
Measured against the airport rather than the country, Republic Airways runs 2 points ahead of the 80.4% 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
82.3%
12,574 completed departures
Avg delay
67 min
Across delayed flights only
Cancelled
3.45%
At CMH, this carrier only
Rank here
#3
Of 11 carriers clearing the floor at CMH
These figures cover 13,000 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.
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 66.4%. Sample sizes sit next to every figure, because a two-point gap across 567 flights means less than a ten-point one.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| Delta Air Lines | 3,730 | 87.1% | 86 min | 1.21% | A |
| American Airlines | 4,222 | 82.4% | 113 min | 2.13% | B |
| Republic Airways (this page) | 13,053 | 82.3% | 67 min | 3.45% | B− |
| Envoy Air | 3,078 | 80.9% | 90 min | 1.10% | B |
| Southwest Airlines | 12,338 | 80.0% | 59 min | 1.01% | B |
| SkyWest Airlines | 1,458 | 76.5% | 120 min | 3.02% | B− |
| PSA Airlines | 1,643 | 76.0% | 87 min | 4.50% | B− |
| United Airlines | 3,396 | 74.1% | 87 min | 1.33% | C |
| Spirit Airlines | 859 | 72.8% | 82 min | 3.84% | C− |
| Alaska Airlines | 465 | 70.9% | 50 min | 1.08% | C |
| Frontier Airlines | 567 | 66.4% | 84 min | 1.94% | C |
PSA Airlines cancels 4.5% 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 | 2,904 | 79.6% | 73 min | 4.96% | B− |
| CMH to EWR · Newark | 2,059 | 83.1% | 66 min | 4.23% | B− |
| CMH to BOS · Boston | 1,888 | 83.6% | 61 min | 2.44% | B |
| CMH to ORD · Chicago | 1,626 | 83.6% | 66 min | 2.71% | B |
| CMH to JFK · New York | 1,570 | 83.8% | 73 min | 4.71% | B− |
| CMH to DCA · Washington | 990 | 67.3% | 61 min | 3.84% | C− |
| CMH to DTW · Detroit | 916 | 89.7% | 69 min | 0.33% | A+ |
| CMH to PHL · Philadelphia | 542 | 88.1% | 64 min | 1.66% | A |
| CMH to IAD · Washington | 527 | 89.7% | 61 min | 0.95% | A+ |
Flight by flight
Republic Airways flight numbers from CMH
13 Republic Airways flight numbers leaving CMH flew their main route often enough to have a record of their own. Grouped by destination.
- YX 4642to BOS 08:0094.3%
- YX 5663to BOS 06:0092.7%
- YX 5812to DTW 08:1093.8%
- YX 3458to EWR 06:0090.8%
- YX 3480to EWR 11:3888.2%
- YX 3430to IAD 06:0094.9%
- YX 4808to JFK 09:0388.1%
- YX 5649to JFK 12:3776.9%
- YX 5656to JFK 07:0388.0%
- YX 4799to LGA 06:0088.8%
- YX 5691to LGA 08:0084.3%
- YX 5700to LGA 06:0093.6%
- YX 3524to ORD 05:3093.8%
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 20 points, against 21 points between the best and worst carrier.
- 5am–8am3,379 flights91.2%
- 8am–11am2,828 flights87.3%
- 11am–2pm2,966 flights80.5%
- 2pm–5pm1,357 flights72.1%
- 5pm–8pm2,259 flights70.9%
- 8pm–5am264 flights79.9%
Scale runs 60% to 95%.
Book the early departure. Flights leaving between 5am–8am arrive on time 91.2% of the time, against 70.9% for the evening window. That is 20 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 3,379 flights scheduled in it.
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. October was the busiest month here, with 1,210 flights.
Delay causes
What holds this operation up
- 46%National Airspace System
- 26%Late-arriving aircraft
- 25%Carrier
- 4%Extreme weather
- 0%Security
46% 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 149,000, against a national NAS share of 21%. The split is drawn from 148,929 reported delay minutes.
Cancellations run at 3.45%, against 1.89% 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.
6.7% 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 about an hour, which a normal layover absorbs.
13,053 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 3.45% 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. 12,574 completed flights over 12 months sit behind that.
Common questions
Republic Airways at CMH
How often is Republic Airways at CMH delayed?
About one flight in six arrives at least 15 minutes late, which is the Department of Transportation's definition of a delayed arrival. That works out to 17.7% of the 13,053 flights in this analysis, against 22.7% 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 3,730 flights. Frontier Airlines is at the other end on 66.4%, 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 91.2% on time. The 5pm–8pm window is the weakest at 70.9%, 20 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
- Republic Airways network-wide record
- John Glenn Columbus International (CMH) all carriers
- CMH to LGA route record79.6%
- CMH to EWR route record83.1%
- CMH to BOS route record83.6%
- CMH to ORD route record83.6%
- Do airlines run better at their own hubs?
- What a cancellation rate actually tells you (and what it hides)
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.