Alaska Airlines is the most reliable airline on the SEA to MCI route with a 81% on-time rate, compared to Delta Air Lines at 80%. Based on 2,705 flights tracked.
Source: Bureau of Transportation Statistics. Updated October 2026.Best Airline: SEA to MCI
Seattle to Kansas City — airline reliability comparison
On-Time Rate by Airline
Alaska Airlines81%
Delta Air Lines80%
SEA to MCI Airline Comparison
| Airline | On-Time % | Cancel % | Avg Delay | Flights |
|---|---|---|---|---|
| Alaska AirlinesASBest | 81% | 1.0% | 45m | 2,705 |
| Delta Air LinesDLWorst | 80% | 1.4% | 71m | 1,301 |
Route Overview
79%
Overall On-Time
53m
Avg Delay
0.9%
Cancel Rate
4,087
Total Flights
Flying out of SEA? We'll brief you.
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Data last updated October 2026. Source: Bureau of Transportation Statistics.