OnTimeStats

Historical on-time performance

Raleigh-durham to Phoenix

1,891 miData through Dec 2025Source: US DOT · BTS

Flights on RDU–PHX arrive on time 85% of the time over the last 12 months.

On-time rate85%arrived within 15 min
p90 delay20 min1 in 10 flights is worse (tail risk)
Cancelled0.2%of scheduled flights

based on 537 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

  • Southwest Airlines
    On-time79%
    Medianon time
    p9030 min
    Cancel0.0%
    Flights187
  • American Airlinesbest
    On-time88%
    Medianon time
    p9015 min
    Cancel0.3%
    Flights350

Why flights run late

Delay causes

  • Airline42%
  • Weather0%
  • Air traffic (NAS)18%
  • Late aircraft40%
  • 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 RDU → PHX

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 73% to 85% on time.

  • Mornings85% on time · p90 20 min · 1,081 flights
  • Middays84% on time · p90 20 min · 185 flights · limited
  • Evenings74% on time · p90 35 min · 234 flights
  • Afternoons73% on time · p90 30 min · 133 flights · limited

Best day of week

On-time rates are fairly even by day on this route — ranging from 78% to 86% on time.

  • Mondays86% on time · p90 20 min · 221 flights
  • Tuesdays85% on time · p90 15 min · 205 flights
  • Fridays84% on time · p90 20 min · 223 flights
  • Thursdays81% on time · p90 20 min · 218 flights
  • Wednesdays80% on time · p90 30 min · 203 flights
  • Saturdays80% on time · p90 25 min · 295 flights
  • Sundays78% on time · p90 35 min · 270 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.