Historical on-time performance
Phoenix to Boise
735 miData through May 2026Source: 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)
Cancelled0.4%of scheduled flights
based on 1,851 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Envoy AirOn-time87%Medianon timep9015 minCancel0.0%Flights31
- SkyWest AirlinesbestOn-time84%Medianon timep9030 minCancel0.6%Flights1,006
- Southwest AirlinesOn-time77%Medianon timep9035 minCancel0.2%Flights814
Why flights run late
Delay causes
- Airline50%
- Weather9%
- Air traffic (NAS)7%
- Late aircraft35%
- Security0%
Most delay minutes here are attributed to Airline.
When flights don't go
Why flights were cancelled
- Airline38%
- Weather25%
- Air traffic (NAS)38%
- Security0%
Most cancellations here are attributed to Airline. Shares are among 8 cancellations with a reported cause (BTS reports causes from June 2003).
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 (2023-06 .. 2026-05).
Best time of day
Mornings are the most reliable time of day to fly this route — 88% on time.
- Mornings88% on time · p90 15 min · 861 flights
- Middays84% on time · p90 25 min · 2,013 flights
- Afternoons82% on time · p90 25 min · 1,039 flights
- Overnights77% on time · p90 40 min · 1,095 flights
- Evenings63% on time · p90 60 min · 372 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 78% to 85% on time.
- Saturdays85% on time · p90 20 min · 685 flights
- Tuesdays84% on time · p90 20 min · 699 flights
- Wednesdays83% on time · p90 25 min · 740 flights
- Sundays82% on time · p90 30 min · 832 flights
- Mondays80% on time · p90 35 min · 804 flights
- Thursdays79% on time · p90 40 min · 806 flights
- Fridays78% on time · p90 35 min · 814 flights
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