Historical on-time performance
Boston to San Diego
2,588 miData through Dec 2025Source: US DOT · BTS
Flights on BOS–SAN arrive on time 79% of the time over the last 12 months.
On-time rate79%arrived within 15 min
p90 delay35 min1 in 10 flights is worse (tail risk)
Cancelled0.7%of scheduled flights
based on 1,554 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- JetBlue AirwaysbestOn-time86%Medianon timep9020 minCancel0.5%Flights860
- Alaska AirlinesOn-time67%Medianon timep9045 minCancel1.3%Flights387
- Delta Air LinesOn-time71%Medianon timep9040 minCancel0.7%Flights307
Why flights run late
Delay causes
- Airline32%
- Weather3%
- Air traffic (NAS)34%
- Late aircraft31%
- Security0%
Most delay minutes here are attributed to Air traffic (NAS).
Over time
On-time trend
By season
On-time rate by month
When to fly
Best time to fly BOS → SAN
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 68% to 85% on time.
- Middays85% on time · p90 20 min · 145 flights · limited
- Mornings80% on time · p90 30 min · 1,467 flights
- Afternoons77% on time · p90 40 min · 1,611 flights
- Evenings68% on time · p90 50 min · 1,522 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 70% to 78% on time.
- Mondays78% on time · p90 35 min · 704 flights
- Tuesdays78% on time · p90 30 min · 678 flights
- Wednesdays77% on time · p90 35 min · 687 flights
- Sundays75% on time · p90 45 min · 702 flights
- Thursdays74% on time · p90 35 min · 691 flights
- Fridays74% on time · p90 45 min · 700 flights
- Saturdays70% on time · p90 50 min · 583 flights
Advertisement
Keep exploring