Historical on-time performance
San Antonio to Boston
Flights on SAT–BOS arrive on time 55% of the time over the last 12 months.
based on 242 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Delta Air LinesOn-time55%Median10 minp90110 minCancel1.2%Flights242
Why flights run late
Delay causes
- Airline9%
- Weather4%
- Air traffic (NAS)60%
- Late aircraft27%
- Security0%
Most delay minutes here are attributed to Air traffic (NAS).
When flights don't go
Why flights were cancelled
- Airline100%
- Weather0%
- Air traffic (NAS)0%
- Security0%
Most cancellations here are attributed to Airline. Shares are among 3 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 SAT → BOS
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 63% on time.
- Afternoons63% on time · p90 90 min · 407 flights
- Middays63% on time · p90 85 min · 549 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 56% to 67% on time.
- Saturdays67% on time · p90 75 min · 132 flights · limited
- Sundays66% on time · p90 75 min · 150 flights · limited
- Tuesdays66% on time · p90 70 min · 149 flights · limited
- Wednesdays66% on time · p90 115 min · 148 flights · limited
- Mondays62% on time · p90 80 min · 154 flights · limited
- Thursdays62% on time · p90 90 min · 151 flights · limited
- Fridays56% on time · p90 100 min · 151 flights · limited
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