Best Time to Fly SEA to CVG: On-Time Stats by Hour & Airline
Seattle/Tacoma International → Cincinnati/Northern Kentucky International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 84.7% of Seattle (SEA) to Cincinnati (CVG) flights arrived on time (793 scheduled flights). That is 7.0 points above the national average of 77.6%.
Among 2 airlines, Delta Air Lines led with 88.5% on time and Alaska Airlines was last with 81.4%.
Over 24 months, Friday was the most reliable day (87% on time) and August the worst month (71%).
The cancellation rate was 0.9% (US average 1.8%).
SEA to CVG 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 |
|---|---|---|---|---|
| Delta Air Lines | 88.5% | 54 min | 0.8% | 362 |
| Alaska Airlines | 81.4% | 43 min | 0.9% | 431 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly SEA to CVG
On-time arrival % by scheduled departure hour (local time), 1,543 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 8am–9am | 92.2% | 0.0% | 52 |
| 9am–10am | 82.0% | 0.0% | 50 |
| 10am–11am | 79.6% | 0.3% | 601 |
| 11am–12pm | 86.0% | 0.6% | 651 |
| 12pm–1pm | 88.6% | 5.4% | 37 |
| 1pm–2pm | 80.7% | 3.1% | 32 |
| 10pm–11pm | 86.5% | 0.0% | 52 |
| 11pm–12am | 50.8% | 0.0% | 68 |
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 CVG
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 | 24 | ||
| Christmas & New Year (Dec 20 - Jan 3) | 81.4% | -2.5 pts | 1.7% | 60 |
| Summer peak (Jun 15 - Aug 15) | 76.6% | -7.3 pts | 0.0% | 355 |
| All other days | 83.9% | — | 0.7% | 1,104 |
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).