Best Time to Fly CMH to BWI: On-Time Stats by Hour & Airline
John Glenn Columbus International → Baltimore/Washington International Thurgood Marshall
Data through July 2026 · Last updated October 18, 2026
1,048 flights were scheduled from Columbus (CMH) to Baltimore (BWI) in the last 12 months, and 87.5% of those that flew arrived on time, 9.9 points above the US average of 77.6%.
Southwest Airlines was the only reporting airline with regular flights on this route.
Over 24 months, Tuesday was the most reliable day (93% on time) and June the worst month (84%).
The cancellation rate was 1.6% (US average 1.8%).
CMH to BWI 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 | 87.5% | 68 min | 1.6% | 1,048 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly CMH to BWI
On-time arrival % by scheduled departure hour (local time), 2,146 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | 97.0% | 1.5% | 403 |
| 6am–7am | 96.6% | 0.3% | 292 |
| 7am–8am | Limited data | 8 | |
| 8am–9am | 95.8% | 4.0% | 50 |
| 9am–10am | 96.4% | 0.7% | 140 |
| 10am–11am | 92.8% | 1.0% | 196 |
| 11am–12pm | 95.2% | 0.0% | 105 |
| 12pm–1pm | 90.8% | 0.7% | 143 |
| 1pm–2pm | 89.5% | 1.7% | 58 |
| 2pm–3pm | 86.8% | 3.6% | 55 |
| 3pm–4pm | 89.7% | 1.3% | 157 |
| 4pm–5pm | 77.5% | 2.0% | 198 |
| 5pm–6pm | 72.3% | 2.8% | 176 |
| 6pm–7pm | 70.7% | 3.3% | 60 |
| 7pm–8pm | 70.2% | 1.7% | 58 |
| 8pm–9pm | 66.0% | 0.0% | 47 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on CMH to BWI
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) | 85.7% | -4.3 pts | 0.0% | 42 |
| Christmas & New Year (Dec 20 - Jan 3) | 89.9% | -0.1 pts | 1.1% | 90 |
| Summer peak (Jun 15 - Aug 15) | 85.3% | -4.6 pts | 3.5% | 370 |
| All other days | 90.0% | — | 1.0% | 1,644 |
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).