Delta Air Lines is the most reliable airline on the BOI to SEA route with a 92% on-time rate, compared to Alaska Airlines at 81%. Based on 25 flights tracked.
Source: Bureau of Transportation Statistics. Updated October 2026.Best Airline: BOI to SEA
Boise to Seattle — airline reliability comparison
On-Time Rate by Airline
Delta Air Lines92%
SkyWest Airlines86%
Alaska Airlines81%
BOI to SEA Airline Comparison
| Airline | On-Time % | Cancel % | Avg Delay | Flights |
|---|---|---|---|---|
| Delta Air LinesDLBest | 92% | 0.0% | 121m | 25 |
| SkyWest AirlinesOO | 86% | 0.2% | 56m | 11,465 |
| Alaska AirlinesASWorst | 81% | 0.5% | 53m | 2,528 |
Route Overview
86%
Overall On-Time
54m
Avg Delay
0.2%
Cancel Rate
14,027
Total Flights
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Data last updated October 2026. Source: Bureau of Transportation Statistics.