OnTimeStats

Historical on-time performance

Seattle to San Diego

1,050 miData through Dec 2025Source: US DOT · BTS

Flights on SEA–SAN arrive on time 76% of the time over the last 12 months.

On-time rate76%arrived within 15 min
Median delayon timetypical arrival
p90 delay35 min1 in 10 flights is worsetail risk
Cancelled1.2%of scheduled flights

based on 4,492 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-time82%
    Medianon time
    p9030 min
    Cancel0.4%
    Flights1,689
  • Alaska Airlines
    On-time72%
    Medianon time
    p9035 min
    Cancel1.6%
    Flights2,803

Why flights run late

Delay causes

  • Airline37%
  • Weather2%
  • Air traffic (NAS)31%
  • Late aircraft29%
  • Security0%

Most delay minutes here are attributed to Airline.

Over time

On-time trend

By season

On-time rate by month

Advertisement

Keep exploring

Related pages

Delay predictorfor this route→SEA airportSeattle→SAN airportSan Diego→SkyWest Airlines on this routecarrier detail→SkyWest Airlinesairline profile→

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.