OnTimeStats

Historical on-time performance

Los Angeles to Philadelphia

2,401 miData through Dec 2025Source: US DOT · BTS

Flights on LAX–PHL 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)
Cancelled1.0%of scheduled flights

based on 2,256 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

  • American Airlines
    On-time79%
    Medianon time
    p9035 min
    Cancel1.0%
    Flights2,256

Why flights run late

Delay causes

  • Airline40%
  • Weather0%
  • Air traffic (NAS)15%
  • Late aircraft45%
  • Security0%

Most delay minutes here are attributed to Late aircraft.

Over time

On-time trend

By season

On-time rate by month

When to fly

Best time to fly LAX → PHL

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 71% to 85% on time.

  • Early mornings85% on time · p90 20 min · 462 flights
  • Mornings84% on time · p90 25 min · 2,807 flights
  • Overnights80% on time · p90 30 min · 1,655 flights
  • Afternoons76% on time · p90 65 min · 1,279 flights
  • Middays71% on time · p90 40 min · 1,374 flights

Best day of week

On-time rates are fairly even by day on this route — ranging from 77% to 82% on time.

  • Tuesdays82% on time · p90 30 min · 1,056 flights
  • Wednesdays81% on time · p90 30 min · 1,056 flights
  • Saturdays80% on time · p90 30 min · 1,073 flights
  • Fridays80% on time · p90 35 min · 1,111 flights
  • Mondays80% on time · p90 30 min · 1,100 flights
  • Thursdays78% on time · p90 30 min · 1,089 flights
  • Sundays77% on time · p90 35 min · 1,092 flights
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Methodology

A flight is on time when it arrives within 15 minutes of schedule — the US DOT / BTS standard. Median and p90(the “1-in-10 bad day”) are read from the full arrival-delay distribution, never averaged across periods.

Figures cover a carrier’s own BTS-coded flights. Cells below ~200 flights are flagged as limited data. All numbers are pre-computed from public BTS On-Time Performance data.