Delta Air Lines is the most reliable airline on the SEA to CVG route with a 89% on-time rate, compared to Alaska Airlines at 80%. Based on 1,302 flights tracked.
Source: Bureau of Transportation Statistics. Updated October 2026.Best Airline: SEA to CVG
Seattle to Cincinnati — airline reliability comparison
On-Time Rate by Airline
Delta Air Lines89%
Alaska Airlines80%
SEA to CVG Airline Comparison
| Airline | On-Time % | Cancel % | Avg Delay | Flights |
|---|---|---|---|---|
| Delta Air LinesDLBest | 89% | 0.7% | 64m | 1,302 |
| Alaska AirlinesASWorst | 80% | 1.2% | 40m | 1,383 |
Route Overview
84%
Overall On-Time
50m
Avg Delay
0.9%
Cancel Rate
2,685
Total Flights
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Data last updated October 2026. Source: Bureau of Transportation Statistics.