Historical on-time performance
Phoenix to Boise
735 miData through Dec 2025Source: US DOT · BTS
Flights on PHX–BOI arrive on time 81% of the time over the last 12 months.
On-time rate81%arrived within 15 min
p90 delay30 min1 in 10 flights is worse (tail risk)
Cancelled0.3%of scheduled flights
based on 1,938 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-time82%Medianon timep9030 minCancel0.4%Flights1,133
- Southwest AirlinesOn-time79%Medianon timep9035 minCancel0.1%Flights805
Why flights run late
Delay causes
- Airline45%
- Weather9%
- Air traffic (NAS)9%
- Late aircraft37%
- Security0%
Most delay minutes here are attributed to Airline.
Over time
On-time trend
By season
On-time rate by month
When to fly
Best time to fly PHX → BOI
All airlines · rolling 36 months (2023-01 .. 2025-12).
Best time of day
Mornings are the most reliable time of day to fly this route — 87% on time.
- Mornings87% on time · p90 20 min · 772 flights
- Middays85% on time · p90 25 min · 2,075 flights
- Afternoons82% on time · p90 25 min · 948 flights
- Overnights76% on time · p90 40 min · 1,031 flights
- Evenings64% on time · p90 60 min · 367 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 77% to 85% on time.
- Saturdays85% on time · p90 20 min · 655 flights
- Tuesdays85% on time · p90 20 min · 684 flights
- Wednesdays83% on time · p90 25 min · 720 flights
- Sundays82% on time · p90 30 min · 813 flights
- Thursdays80% on time · p90 35 min · 766 flights
- Mondays80% on time · p90 40 min · 780 flights
- Fridays77% on time · p90 40 min · 775 flights
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