Historical on-time performance
San Antonio to Philadelphia
1,496 miData through May 2026Source: US DOT · BTS
Flights on SAT–PHL arrive on time 78% of the time over the last 12 months.
On-time rate78%arrived within 15 min
p90 delay35 min1 in 10 flights is worse (tail risk)
Cancelled3.0%of scheduled flights
based on 132 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- American AirlinesOn-time78%Medianon timep9035 minCancel3.0%Flights132
Why flights run late
Delay causes
- Airline56%
- Weather2%
- Air traffic (NAS)15%
- Late aircraft27%
- Security0%
Most delay minutes here are attributed to Airline.
When flights don't go
Why flights were cancelled
- Airline0%
- Weather75%
- Air traffic (NAS)25%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 4 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 → PHL
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 — 87% on time.
- Mornings87% on time · p90 15 min · 140 flights · limited
- Middays63% on time · p90 70 min · 221 flights
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