OnTimeStats

Historical on-time performance

Key West to Atlanta

646 miData through May 2026Source: US DOT · BTS

Flights on EYW–ATL arrive on time 84% of the time over the last 12 months.

On-time rate84%arrived within 15 min
p90 delay30 min1 in 10 flights is worse (tail risk)
Cancelled1.4%of scheduled flights

based on 1,456 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

  • Delta Air Lines
    On-time84%
    Medianon time
    p9030 min
    Cancel1.4%
    Flights1,456

Why flights run late

Delay causes

  • Airline33%
  • Weather2%
  • Air traffic (NAS)17%
  • Late aircraft48%
  • Security0%

Most delay minutes here are attributed to Late aircraft.

When flights don't go

Why flights were cancelled

  • Airline45%
  • Weather55%
  • Air traffic (NAS)0%
  • Security0%

Most cancellations here are attributed to Weather. Shares are among 20 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 EYW → ATL

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 79% to 86% on time.

  • Mornings86% on time · p90 20 min · 1,091 flights
  • Middays83% on time · p90 25 min · 1,357 flights
  • Evenings79% on time · p90 40 min · 1,081 flights
  • Afternoons79% on time · p90 35 min · 858 flights

Best day of week

On-time rates are fairly even by day on this route — ranging from 75% to 85% on time.

  • Thursdays85% on time · p90 25 min · 623 flights
  • Tuesdays85% on time · p90 20 min · 624 flights
  • Wednesdays84% on time · p90 25 min · 623 flights
  • Fridays82% on time · p90 35 min · 625 flights
  • Saturdays81% on time · p90 30 min · 640 flights
  • Mondays80% on time · p90 40 min · 626 flights
  • Sundays75% on time · p90 50 min · 626 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.