Historical on-time performance
Boise to Seattle
Flights on BOI–SEA arrive on time 85% of the time over the last 12 months.
based on 3,847 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-time86%Medianon timep9020 minCancel0.3%Flights2,986
- Alaska AirlinesOn-time84%Medianon timep9020 minCancel0.8%Flights861
Why flights run late
Delay causes
- Airline51%
- Weather13%
- Air traffic (NAS)20%
- Late aircraft16%
- Security0%
Most delay minutes here are attributed to Airline.
When flights don't go
Why flights were cancelled
- Airline31%
- Weather63%
- Air traffic (NAS)6%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 16 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 BOI → SEA
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 — 89% on time.
- Mornings89% on time · p90 15 min · 4,494 flights
- Middays85% on time · p90 20 min · 2,340 flights
- Evenings82% on time · p90 25 min · 2,155 flights
- Afternoons81% on time · p90 30 min · 2,054 flights
- Overnights63% on time · p90 55 min · 518 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 81% to 88% on time.
- Saturdays88% on time · p90 20 min · 1,532 flights
- Tuesdays87% on time · p90 20 min · 1,615 flights
- Wednesdays85% on time · p90 20 min · 1,607 flights
- Mondays84% on time · p90 25 min · 1,704 flights
- Thursdays82% on time · p90 30 min · 1,708 flights
- Sundays82% on time · p90 30 min · 1,696 flights
- Fridays81% on time · p90 30 min · 1,699 flights
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