OnTimeStats

Historical on-time performance

JFKSJU

New York to San Juan

1,597 miData through Dec 2025Source: US DOT · BTS

Flights on JFK–SJU arrive on time 71% of the time over the last 12 months.

On-time rate71%arrived within 15 min
Median delayon timetypical arrival
p90 delay55 min1 in 10 flights is worsetail risk
Cancelled1.1%of scheduled flights

based on 3,959 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

  • Delta Air Linesbest
    On-time78%
    Medianon time
    p9035 min
    Cancel0.7%
    Flights1,102
  • JetBlue Airways
    On-time71%
    Medianon time
    p9060 min
    Cancel1.2%
    Flights2,294
  • Frontier Airlines
    On-time55%
    Median5 min
    p9075 min
    Cancel1.8%
    Flights563

Why flights run late

Delay causes

  • Airline39%
  • Weather3%
  • Air traffic (NAS)29%
  • Late aircraft29%
  • Security0%

Most delay minutes here are attributed to Airline.

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.