OnTimeStats

Historical on-time performance

Philadelphia to Houston

1,324 miData through Dec 2025Source: US DOT · BTS

Flights on PHL–IAH arrive on time 76% of the time over the last 12 months.

On-time rate76%arrived within 15 min
p90 delay55 min1 in 10 flights is worse (tail risk)
Cancelled1.7%of scheduled flights

based on 1,476 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

Too close to call — no single carrier is clearly more on-time here.

  • United Airlines
    On-time86%
    Medianon time
    p9020 min
    Cancel0.6%
    Flights825
  • PSA Airlines
    On-time76%
    Medianon time
    p9065 min
    Cancel1.5%
    Flights67
  • American Airlines
    On-time63%
    Medianon time
    p9085 min
    Cancel3.1%
    Flights554
  • Spirit Airlines
    On-time53%
    Median5 min
    p90125 min
    Cancel6.7%
    Flights30

Why flights run late

Delay causes

  • Airline29%
  • Weather4%
  • Air traffic (NAS)25%
  • Late aircraft42%
  • 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 PHL → IAH

All airlines · rolling 36 months (2023-01 .. 2025-12).

Best time of day

Mornings are the most reliable time of day to fly this route — 84% on time.

  • Mornings84% on time · p90 20 min · 1,960 flights
  • Middays80% on time · p90 45 min · 1,093 flights
  • Afternoons69% on time · p90 110 min · 217 flights
  • Evenings69% on time · p90 75 min · 2,114 flights
  • Overnights66% on time · p90 85 min · 124 flights · limited

Best day of week

On-time rates are fairly even by day on this route — ranging from 74% to 80% on time.

  • Tuesdays80% on time · p90 40 min · 728 flights
  • Wednesdays80% on time · p90 40 min · 758 flights
  • Saturdays78% on time · p90 45 min · 646 flights
  • Fridays75% on time · p90 55 min · 853 flights
  • Sundays74% on time · p90 55 min · 817 flights
  • Thursdays74% on time · p90 55 min · 847 flights
  • Mondays74% on time · p90 60 min · 859 flights
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Keep exploring

Related pages

Delay predictorfor this route→PHL airportPhiladelphia→IAH airportHouston→Mesa Airlines on this routecarrier detail→Mesa Airlinesairline profile→

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.