Historical on-time performance
Los Angeles to Boston
2,611 miData through May 2026Source: US DOT · BTS
Flights on LAX–BOS arrive on time 77% of the time over the last 12 months.
On-time rate77%arrived within 15 min
p90 delay45 min1 in 10 flights is worse (tail risk)
Cancelled1.4%of scheduled flights
based on 4,659 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- United AirlinesbestOn-time85%Medianon timep9025 minCancel1.1%Flights716
- Delta Air LinesOn-time77%Medianon timep9045 minCancel1.6%Flights1,226
- American AirlinesOn-time76%Medianon timep9050 minCancel1.3%Flights1,094
- JetBlue AirwaysOn-time75%Medianon timep9055 minCancel1.3%Flights1,623
Why flights run late
Delay causes
- Airline32%
- Weather3%
- Air traffic (NAS)29%
- Late aircraft35%
- Security0%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline32%
- Weather67%
- Air traffic (NAS)2%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 63 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 LAX → BOS
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 — 83% on time.
- Mornings83% on time · p90 30 min · 4,806 flights
- Overnights81% on time · p90 30 min · 4,282 flights
- Afternoons77% on time · p90 50 min · 1,635 flights
- Middays72% on time · p90 65 min · 3,067 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 75% to 83% on time.
- Tuesdays83% on time · p90 30 min · 1,883 flights
- Saturdays82% on time · p90 30 min · 1,723 flights
- Wednesdays80% on time · p90 35 min · 1,936 flights
- Mondays79% on time · p90 40 min · 2,064 flights
- Fridays78% on time · p90 45 min · 2,089 flights
- Thursdays78% on time · p90 45 min · 2,059 flights
- Sundays75% on time · p90 50 min · 2,063 flights
Keep exploring