OnTimeStats

Historical on-time performance

New York to Anchorage

3,386 miData through Dec 2025Source: US DOT · BTS

Flights on JFK–ANC arrive on time 52% of the time over the last 12 months.

On-time rate52%arrived within 15 min
p90 delay45 min1 in 10 flights is worse (tail risk)
Cancelled6.5%of scheduled flights

based on 31 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

  • Alaska Airlines
    On-time52%
    Median5 min
    p9045 min
    Cancel6.5%
    Flights31

Why flights run late

Delay causes

  • Airline8%
  • Weather0%
  • Air traffic (NAS)54%
  • Late aircraft31%
  • Security7%

Most delay minutes here are attributed to Air traffic (NAS).

Over time

On-time trend

By season

On-time rate by month

The seasonal pattern appears once multiple months of the year are loaded.

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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.