Historical on-time performance
San Juan to Philadelphia
1,576 miData through May 2026Source: US DOT · BTS
Flights on SJU–PHL arrive on time 66% of the time over the last 12 months.
On-time rate66%arrived within 15 min
p90 delay60 min1 in 10 flights is worse (tail risk)
Cancelled3.0%of scheduled flights
based on 1,677 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- JetBlue AirwaysOn-time93%Medianon timep90on timeCancel0.0%Flights61
- American AirlinesbestOn-time76%Medianon timep9035 minCancel2.8%Flights648
- Spirit AirlinesOn-time70%Medianon timep9055 minCancel3.3%Flights122
- Frontier AirlinesOn-time56%Median5 minp9080 minCancel3.4%Flights846
Why flights run late
Delay causes
- Airline45%
- Weather0%
- Air traffic (NAS)10%
- Late aircraft45%
- Security0%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline25%
- Weather67%
- Air traffic (NAS)8%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 51 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 SJU → 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 — 83% on time.
- Mornings83% on time · p90 25 min · 1,072 flights
- Evenings64% on time · p90 95 min · 256 flights
- Afternoons63% on time · p90 75 min · 739 flights
- Middays62% on time · p90 70 min · 1,067 flights
- Early mornings58% on time · p90 80 min · 1,168 flights
- Overnights48% on time · p90 95 min · 568 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 62% to 67% on time.
- Saturdays67% on time · p90 75 min · 711 flights
- Fridays65% on time · p90 70 min · 754 flights
- Tuesdays65% on time · p90 60 min · 619 flights
- Thursdays65% on time · p90 65 min · 707 flights
- Sundays63% on time · p90 70 min · 727 flights
- Wednesdays63% on time · p90 70 min · 616 flights
- Mondays62% on time · p90 80 min · 736 flights
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