OnTimeStats

Historical on-time performance

San Francisco to Raleigh-durham

2,400 miData through Dec 2025Source: US DOT · BTS

Flights on SFO–RDU arrive on time 90% of the time over the last 12 months.

On-time rate90%arrived within 15 min
p90 delay10 min1 in 10 flights is worse (tail risk)
Cancelled0.0%of scheduled flights

based on 880 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

  • United Airlines
    On-time90%
    Medianon time
    p9010 min
    Cancel0.0%
    Flights880

Why flights run late

Delay causes

  • Airline37%
  • Weather2%
  • Air traffic (NAS)12%
  • Late aircraft48%
  • 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 SFO → RDU

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 83% to 91% on time.

  • Middays91% on time · p90 10 min · 137 flights · limited
  • Mornings89% on time · p90 15 min · 1,092 flights
  • Overnights83% on time · p90 25 min · 964 flights

Best day of week

On-time rates are fairly even by day on this route — ranging from 83% to 89% on time.

  • Tuesdays89% on time · p90 15 min · 272 flights
  • Mondays88% on time · p90 15 min · 334 flights
  • Thursdays88% on time · p90 15 min · 335 flights
  • Wednesdays86% on time · p90 15 min · 302 flights
  • Fridays85% on time · p90 20 min · 325 flights
  • Sundays85% on time · p90 25 min · 336 flights
  • Saturdays83% on time · p90 25 min · 290 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.