Delta Air Lines is the most reliable airline on the MCI to SEA route with a 90% on-time rate, compared to Alaska Airlines at 85%. Based on 1,300 flights tracked.
Source: Bureau of Transportation Statistics. Updated October 2026.Best Airline: MCI to SEA
Kansas City to Seattle — airline reliability comparison
On-Time Rate by Airline
Delta Air Lines90%
Alaska Airlines85%
MCI to SEA Airline Comparison
| Airline | On-Time % | Cancel % | Avg Delay | Flights |
|---|---|---|---|---|
| Delta Air LinesDLBest | 90% | 1.4% | 81m | 1,300 |
| Alaska AirlinesASWorst | 85% | 1.3% | 51m | 2,705 |
Route Overview
86%
Overall On-Time
58m
Avg Delay
1.1%
Cancel Rate
4,086
Total Flights
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Data last updated October 2026. Source: Bureau of Transportation Statistics.