Best Time to Fly SEA to CMH: On-Time Stats by Hour & Airline
Seattle/Tacoma International → John Glenn Columbus International
Data through July 2026 · Last updated October 18, 2026
464 flights were scheduled from Seattle (SEA) to Columbus (CMH) in the last 12 months, and 80.4% of those that flew arrived on time, 2.8 points above the US average of 77.6%.
Alaska Airlines was the only reporting airline with regular flights on this route.
Over 24 months, Tuesday was the most reliable day (87% on time) and August the worst month (66%).
The cancellation rate was 0.4% (US average 1.8%).
SEA 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 |
|---|---|---|---|---|
| Alaska Airlines | 80.3% | 42 min | 0.4% | 460 |
| American Airlines | Limited data | 1 | ||
| Delta Air Lines | Limited data | 1 | ||
| United Airlines | Limited data | 1 | ||
| Southwest Airlines | Limited data | 1 | ||
80%+ good 70–79.9% fair <70% poor
Best time of day to fly SEA to CMH
On-time arrival % by scheduled departure hour (local time), 930 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 9am–10am | 77.6% | 0.0% | 144 |
| 10am–11am | 76.2% | 0.0% | 366 |
| 11am–12pm | 82.0% | 2.2% | 91 |
| 1pm–2pm | Limited data | 26 | |
| 2pm–3pm | 92.4% | 0.0% | 66 |
| 9pm–10pm | 58.5% | 0.0% | 123 |
| 10pm–11pm | 77.9% | 0.0% | 114 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on SEA 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) | Limited data | 13 | ||
| Christmas & New Year (Dec 20 - Jan 3) | 83.3% | +3.6 pts | 0.0% | 30 |
| Summer peak (Jun 15 - Aug 15) | 66.5% | -13.2 pts | 0.0% | 246 |
| All other days | 79.7% | — | 0.5% | 641 |
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).