Historical on-time performance
Portland to Boise
344 miData through Dec 2025Source: US DOT · BTS
Flights on PDX–BOI arrive on time 86% of the time over the last 12 months.
On-time rate86%arrived within 15 min
p90 delay20 min1 in 10 flights is worse (tail risk)
Cancelled0.4%of scheduled flights
based on 927 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-time87%Medianon timep9015 minCancel0.3%Flights579
- Alaska AirlinesOn-time83%Medianon timep9025 minCancel0.6%Flights348
Why flights run late
Delay causes
- Airline28%
- Weather2%
- Air traffic (NAS)19%
- Late aircraft51%
- 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 PDX → 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 81% to 88% on time.
- Mornings88% on time · p90 15 min · 338 flights
- Middays87% on time · p90 15 min · 702 flights
- Overnights85% on time · p90 20 min · 467 flights
- Evenings85% on time · p90 20 min · 455 flights
- Afternoons81% on time · p90 30 min · 656 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 81% to 89% on time.
- Wednesdays89% on time · p90 15 min · 373 flights
- Tuesdays89% on time · p90 15 min · 369 flights
- Saturdays88% on time · p90 15 min · 320 flights
- Thursdays83% on time · p90 25 min · 392 flights
- Mondays83% on time · p90 30 min · 400 flights
- Sundays81% on time · p90 35 min · 366 flights
- Fridays81% on time · p90 30 min · 398 flights
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