Best Time to Fly BWI to CMH: On-Time Stats by Hour & Airline
Baltimore/Washington International Thurgood Marshall → John Glenn Columbus International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 79.7% of Baltimore (BWI) to Columbus (CMH) flights arrived on time (1,056 scheduled flights). That is 2.0 points above the national average of 77.6%.
Southwest Airlines was the only reporting airline with regular flights on this route.
November has been the best month (88% on time) and Sunday the weakest day of the week (67%).
1.5% of flights were cancelled, versus 1.8% nationally.
BWI to CMH on-time performance by airline
Last 12 months. Airlines with fewer than 30 completed flights are marked “limited data”.
| Airline | On time | Avg delay when late | Cancelled | Flights |
|---|---|---|---|---|
| Southwest Airlines | 79.7% | 61 min | 1.5% | 1,056 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly BWI to CMH
On-time arrival % by scheduled departure hour (local time), 2,151 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 7am–8am | Limited data | 7 | |
| 8am–9am | 94.7% | 0.0% | 94 |
| 9am–10am | 89.7% | 0.8% | 236 |
| 10am–11am | 89.7% | 1.1% | 275 |
| 11am–12pm | 88.1% | 1.0% | 102 |
| 12pm–1pm | Limited data | 24 | |
| 2pm–3pm | 90.6% | 0.9% | 108 |
| 3pm–4pm | 76.2% | 1.2% | 163 |
| 4pm–5pm | 62.6% | 2.0% | 195 |
| 5pm–6pm | 65.5% | 0.6% | 169 |
| 6pm–7pm | 62.7% | 0.0% | 67 |
| 7pm–8pm | 94.3% | 2.8% | 36 |
| 8pm–9pm | 79.7% | 1.5% | 206 |
| 9pm–10pm | 69.6% | 0.6% | 162 |
| 10pm–11pm | 63.5% | 4.2% | 307 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on BWI to CMH
On-time arrivals during holiday periods compared with all other days, last 24 months.
| Period | On time | vs other days | Cancelled | Flights |
|---|---|---|---|---|
| Thanksgiving week (Tue before to Mon after) | 72.1% | -8.3 pts | 0.0% | 43 |
| Christmas & New Year (Dec 20 - Jan 3) | 69.2% | -11.2 pts | 0.0% | 91 |
| Summer peak (Jun 15 - Aug 15) | 67.1% | -13.3 pts | 4.0% | 375 |
| All other days | 80.4% | — | 1.0% | 1,642 |
Monthly on-time trend
On-time arrival % each month, with the 12-month US average for reference.
What causes delays on this route
Share of reported delay minutes, last 12 months (BTS cause categories).