OnTimeStats

Historical on-time performance

LASSEA

Las Vegas to Seattle

866 miData through Dec 2025Source: US DOT · BTS

Flights on LAS–SEA arrive on time 80% of the time over the last 12 months.

On-time rate80%arrived within 15 min
Median delayon timetypical arrival
p90 delay35 min1 in 10 flights is worsetail risk
Cancelled0.8%of scheduled flights

based on 5,614 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-time87%
    Medianon time
    p9020 min
    Cancel0.3%
    Flights1,724
  • Alaska Airlines
    On-time77%
    Medianon time
    p9035 min
    Cancel1.2%
    Flights2,652
  • Spirit Airlines
    On-time87%
    Medianon time
    p9020 min
    Cancel0.0%
    Flights265
  • Southwest Airlines
    On-time72%
    Medianon time
    p9040 min
    Cancel0.5%
    Flights973

Why flights run late

Delay causes

  • Airline34%
  • Weather2%
  • Air traffic (NAS)18%
  • Late aircraft46%
  • 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.