SkyWest Airlines is the most reliable airline on the SEA to BOI route with a 87% on-time rate, compared to Alaska Airlines at 76%. Based on 11,974 flights tracked.
Source: Bureau of Transportation Statistics. Updated October 2026.Best Airline: SEA to BOI
Seattle to Boise — airline reliability comparison
On-Time Rate by Airline
SkyWest Airlines87%
Delta Air Lines81%
Alaska Airlines76%
SEA to BOI Airline Comparison
| Airline | On-Time % | Cancel % | Avg Delay | Flights |
|---|---|---|---|---|
| SkyWest AirlinesOOBest | 87% | 0.2% | 53m | 11,974 |
| Delta Air LinesDL | 81% | 0.0% | 171m | 26 |
| Alaska AirlinesASWorst | 76% | 0.5% | 46m | 2,530 |
Route Overview
85%
Overall On-Time
51m
Avg Delay
0.2%
Cancel Rate
14,538
Total Flights
Flying out of SEA? We'll brief you.
Delays, TSA, weather, gates — we'll let you know if something matters.
Data last updated October 2026. Source: Bureau of Transportation Statistics.