OnTimeStats

Historical on-time performance

DCASAT

Washington to San Antonio

1,380 miData through Dec 2025Source: US DOT · BTS

Flights on DCA–SAT arrive on time 52% of the time over the last 12 months.

On-time rate52%arrived within 15 min
Median delay5 mintypical arrival
p90 delay120 min1 in 10 flights is worsetail risk
Cancelled1.5%of scheduled flights

based on 274 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

  • American Airlinesbest
    On-time52%
    Median5 min
    p90120 min
    Cancel1.5%
    Flights274

Why flights run late

Delay causes

  • Airline19%
  • Weather3%
  • Air traffic (NAS)9%
  • Late aircraft70%
  • Security0%

Most delay minutes here are attributed to Late aircraft.

Over time

On-time trend

By season

On-time rate by month

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Related pages

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.