Historical on-time performance
Boston to Los Angeles
Flights on BOS–LAX arrive on time 75% of the time over the last 12 months.
based on 4,655 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.
- United AirlinesOn-time77%Medianon timep9045 minCancel1.1%Flights716
- JetBlue AirwaysOn-time76%Medianon timep9050 minCancel1.4%Flights1,622
- Delta Air LinesOn-time75%Medianon timep9040 minCancel1.6%Flights1,224
- American AirlinesOn-time72%Medianon timep9060 minCancel1.3%Flights1,093
Why flights run late
Delay causes
- Airline35%
- Weather2%
- Air traffic (NAS)20%
- Late aircraft43%
- Security0%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline29%
- Weather68%
- Air traffic (NAS)3%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 65 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 BOS → LAX
All airlines · rolling 36 months (2023-06 .. 2026-05).
Best time of day
On-time rates are fairly even by time of day on this route — ranging from 63% to 84% on time.
- Mornings84% on time · p90 25 min · 5,514 flights
- Middays83% on time · p90 25 min · 1,981 flights
- Afternoons74% on time · p90 55 min · 1,315 flights
- Evenings70% on time · p90 75 min · 3,598 flights
- Overnights63% on time · p90 85 min · 1,402 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 74% to 81% on time.
- Wednesdays81% on time · p90 35 min · 1,928 flights
- Tuesdays79% on time · p90 35 min · 1,881 flights
- Saturdays79% on time · p90 45 min · 1,721 flights
- Thursdays77% on time · p90 50 min · 2,060 flights
- Fridays76% on time · p90 55 min · 2,084 flights
- Sundays75% on time · p90 60 min · 2,068 flights
- Mondays74% on time · p90 55 min · 2,068 flights
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