OnTimeStats

Historical on-time performance

Tampa to Washington

810 miData through Dec 2025Source: US DOT · BTS

Flights on TPA–IAD arrive on time 81% of the time over the last 12 months.

On-time rate81%arrived within 15 min
p90 delay40 min1 in 10 flights is worse (tail risk)
Cancelled0.4%of scheduled flights

based on 1,339 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.

  • United Airlines
    On-time81%
    Medianon time
    p9040 min
    Cancel0.5%
    Flights1,308
  • Frontier Airlines
    On-time71%
    Median5 min
    p9035 min
    Cancel0.0%
    Flights31

Why flights run late

Delay causes

  • Airline25%
  • Weather11%
  • Air traffic (NAS)27%
  • Late aircraft37%
  • Security0%

Most delay minutes here are attributed to Late aircraft.

Over time

On-time trend

By season

On-time rate by month

When to fly

Best time to fly TPA → IAD

All airlines · rolling 36 months (2023-01 .. 2025-12).

Best time of day

Mornings are the most reliable time of day to fly this route — 89% on time.

  • Mornings89% on time · p90 10 min · 1,229 flights
  • Middays83% on time · p90 30 min · 1,036 flights
  • Evenings74% on time · p90 65 min · 1,141 flights
  • Afternoons69% on time · p90 70 min · 347 flights

Best day of week

On-time rates are fairly even by day on this route — ranging from 76% to 86% on time.

  • Tuesdays86% on time · p90 25 min · 508 flights
  • Fridays82% on time · p90 40 min · 546 flights
  • Wednesdays81% on time · p90 35 min · 508 flights
  • Mondays81% on time · p90 35 min · 554 flights
  • Saturdays81% on time · p90 35 min · 527 flights
  • Thursdays80% on time · p90 35 min · 554 flights
  • Sundays76% on time · p90 50 min · 556 flights
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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.