Seattle (SEA) to Columbus (CMH): On-Time Performance
Data through July 2026
When you fly SEA to CMH matters as much as anything else about the booking: the route swung from 97% on-time in October 2024 to just 57% in July 2025. Across the full period the route averages 76% on-time against a national 78%. Morning departures also hold up better than evening ones (78% vs 68%), which matters most in the rough months.
- On-time
- 76%
- arrived <15 min late
- Avg delay
- 10 min
- completed flights
- Cancelled
- 0.3%
- Flights/day
- 1.3
- last 12 months
- Duration
- 4h 28m
- scheduled
- Distance
- 2,016 mi
Monthly on-time trend
Best time to fly from SEA to CMH
Aim for departures around 2 p.m. (92% on-time); avoid 9 p.m. departures (59%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 72% | 12 min |
| Tuesdaybest | 88% | 8 min |
| Wednesday | 78% | 9 min |
| Thursday | 80% | 9 min |
| Friday | 73% | 13 min |
| Saturday | 73% | 10 min |
| Sunday | 75% | 11 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft33%
- Airline operations36%
- National airspace system28%
- Weather4%
Frequently asked questions
- How often are flights from SEA to CMH delayed?
- 24% of SEA–CMH flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-07 and 2026-07. The average arrival delay across completed flights was 10 minutes.
- What is the best time of day to fly from SEA to CMH?
- Departures around 2 p.m. have the best record (92% on-time), while departures around 9 p.m. have the worst (59%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from SEA to CMH?
- The scheduled SEA–CMH flight time averages 4h 28m over 2,016 miles. Actual arrival times vary — flights on this route land 15+ minutes late 24% of the time.
- How often are SEA to CMH flights cancelled?
- 0.3% of scheduled flights on this route were cancelled between 2024-07 and 2026-07, at or below the national rate of 1.6%.
- What is the worst month to fly from SEA to CMH?
- July 2025 was the roughest month in this dataset, with only 57% of arrivals on time. The best was October 2024 at 97%. If your dates are flexible, that 39-point gap is worth planning around.
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Based on 992 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.