Alaska Airlines is the most reliable airline on the CHS to SEA route with a 79% on-time rate. Based on 1,249 flights tracked.
Source: Bureau of Transportation Statistics. Updated October 2026.Best Airline: CHS to SEA
Charleston to Seattle — airline reliability comparison
On-Time Rate by Airline
Alaska Airlines79%
CHS to SEA Airline Comparison
| Airline | On-Time % | Cancel % | Avg Delay | Flights |
|---|---|---|---|---|
| Alaska AirlinesASBest | 79% | 1.3% | 49m | 1,249 |
Route Overview
79%
Overall On-Time
49m
Avg Delay
1.2%
Cancel Rate
1,249
Total Flights
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Data last updated October 2026. Source: Bureau of Transportation Statistics.