Historical on-time performance
San Diego to Boise
749 miData through Dec 2025Source: US DOT · BTS
Flights on SAN–BOI arrive on time 79% of the time over the last 12 months.
On-time rate79%arrived within 15 min
p90 delay35 min1 in 10 flights is worse (tail risk)
Cancelled0.8%of scheduled flights
based on 766 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
Too close to call — no single carrier is clearly more on-time here.
- SkyWest AirlinesOn-time81%Medianon timep9030 minCancel0.7%Flights430
- Southwest AirlinesOn-time75%Medianon timep9040 minCancel0.0%Flights215
- Alaska AirlinesOn-time77%Medianon timep9035 minCancel2.5%Flights121
Why flights run late
Delay causes
- Airline28%
- Weather0%
- Air traffic (NAS)21%
- Late aircraft50%
- Security0%
Most delay minutes here are attributed to Late aircraft.
Over time
On-time trend
By season
On-time rate by month
When to fly
Best time to fly SAN → BOI
All airlines · rolling 36 months (2023-01 .. 2025-12).
Best time of day
On-time rates are fairly even by time of day on this route — ranging from 76% to 80% on time.
- Mornings80% on time · p90 25 min · 614 flights
- Afternoons80% on time · p90 35 min · 207 flights
- Overnights78% on time · p90 35 min · 212 flights
- Middays78% on time · p90 35 min · 348 flights
- Evenings76% on time · p90 45 min · 665 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 72% to 85% on time.
- Wednesdays85% on time · p90 20 min · 268 flights
- Saturdays83% on time · p90 20 min · 289 flights
- Tuesdays81% on time · p90 30 min · 273 flights
- Sundays79% on time · p90 35 min · 343 flights
- Mondays75% on time · p90 35 min · 293 flights
- Thursdays73% on time · p90 50 min · 288 flights
- Fridays72% on time · p90 50 min · 292 flights
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