OnTimeStats

Historical on-time performance

Seattle to Tampa

2,520 miData through May 2026Source: US DOT · BTS

Flights on SEA–TPA arrive on time 74% of the time over the last 12 months.

On-time rate74%arrived within 15 min
p90 delay35 min1 in 10 flights is worse (tail risk)
Cancelled0.7%of scheduled flights

based on 919 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

Too close to call — no single carrier is clearly more on-time here.

  • Alaska Airlines
    On-time75%
    Medianon time
    p9035 min
    Cancel0.7%
    Flights613
  • Delta Air Lines
    On-time71%
    Medianon time
    p9040 min
    Cancel0.7%
    Flights306

Why flights run late

Delay causes

  • Airline45%
  • Weather6%
  • Air traffic (NAS)22%
  • Late aircraft27%
  • Security0%

Most delay minutes here are attributed to Airline.

When flights don't go

Why flights were cancelled

  • Airline83%
  • Weather17%
  • Air traffic (NAS)0%
  • Security0%

Most cancellations here are attributed to Airline. Shares are among 6 cancellations with a reported cause (BTS reports causes from June 2003).

Over time

On-time trend

By season

On-time rate by month

When to fly

Best time to fly SEA → TPA

All airlines · rolling 36 months (2023-06 .. 2026-05).

Best time of day

On-time rates are fairly even by time of day on this route — ranging from 75% to 75% on time.

  • Mornings75% on time · p90 35 min · 1,208 flights
  • Middays75% on time · p90 35 min · 894 flights
  • Overnights75% on time · p90 35 min · 899 flights

Best day of week

On-time rates are fairly even by day on this route — ranging from 72% to 78% on time.

  • Tuesdays78% on time · p90 30 min · 420 flights
  • Saturdays77% on time · p90 35 min · 430 flights
  • Mondays76% on time · p90 35 min · 448 flights
  • Wednesdays76% on time · p90 30 min · 430 flights
  • Fridays75% on time · p90 35 min · 451 flights
  • Thursdays74% on time · p90 35 min · 446 flights
  • Sundays72% on time · p90 45 min · 452 flights

Keep exploring

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.