OnTimeStats

Historical on-time performance

Boston to Phoenix

2,300 miData through Dec 2025Source: US DOT · BTS

Flights on BOS–PHX arrive on time 76% of the time over the last 12 months.

On-time rate76%arrived within 15 min
p90 delay40 min1 in 10 flights is worse (tail risk)
Cancelled0.5%of scheduled flights

based on 1,982 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

  • American Airlinesbest
    On-time81%
    Medianon time
    p9035 min
    Cancel0.5%
    Flights1,330
  • Delta Air Lines
    On-time62%
    Medianon time
    p9050 min
    Cancel0.9%
    Flights322
  • JetBlue Airways
    On-time71%
    Medianon time
    p9055 min
    Cancel0.0%
    Flights330

Why flights run late

Delay causes

  • Airline40%
  • Weather4%
  • Air traffic (NAS)21%
  • Late aircraft35%
  • Security0%

Most delay minutes here are attributed to Airline.

Over time

On-time trend

By season

On-time rate by month

When to fly

Best time to fly BOS → PHX

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 — 86% on time.

  • Mornings86% on time · p90 20 min · 2,307 flights
  • Middays83% on time · p90 25 min · 1,121 flights
  • Afternoons71% on time · p90 60 min · 657 flights
  • Evenings67% on time · p90 75 min · 1,903 flights
  • Overnights56% on time · p90 90 min · 152 flights · limited

Best day of week

On-time rates are fairly even by day on this route — ranging from 73% to 80% on time.

  • Tuesdays80% on time · p90 40 min · 830 flights
  • Saturdays80% on time · p90 30 min · 873 flights
  • Wednesdays79% on time · p90 40 min · 844 flights
  • Mondays78% on time · p90 45 min · 895 flights
  • Thursdays77% on time · p90 45 min · 896 flights
  • Fridays74% on time · p90 55 min · 891 flights
  • Sundays73% on time · p90 55 min · 912 flights
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Keep exploring

Related pages

Delay predictorfor this route→BOS airportBoston→PHX airportPhoenix→American Airlines on this routecarrier detail→American 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.