OnTimeStats

Historical on-time performance

Miami to Kansas City

1,251 miData through May 2026Source: US DOT · BTS

Flights on MIA–MCI arrive on time 67% of the time over the last 12 months.

On-time rate67%arrived within 15 min
p90 delay75 min1 in 10 flights is worse (tail risk)
Cancelled1.6%of scheduled flights

based on 485 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

Not enough comparable data to name a most-on-time carrier — low-data carriers aren't ranked.

  • Southwest Airlines
    On-time76%
    Medianon time
    p90120 min
    Cancel0.0%
    Flights33
  • American Airlines
    On-time66%
    Medianon time
    p9075 min
    Cancel1.8%
    Flights452

Why flights run late

Delay causes

  • Airline42%
  • Weather1%
  • Air traffic (NAS)7%
  • Late aircraft48%
  • Security1%

Most delay minutes here are attributed to Late aircraft.

When flights don't go

Why flights were cancelled

  • Airline0%
  • Weather75%
  • Air traffic (NAS)25%
  • Security0%

Most cancellations here are attributed to Weather. Shares are among 8 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 MIA → MCI

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 64% to 72% on time.

  • Afternoons72% on time · p90 50 min · 268 flights
  • Evenings65% on time · p90 65 min · 165 flights · limited
  • Middays64% on time · p90 50 min · 103 flights · limited
  • Overnights64% on time · p90 70 min · 1,092 flights

Best day of week

On-time rates are fairly even by day on this route — ranging from 60% to 73% on time.

  • Wednesdays73% on time · p90 65 min · 213 flights
  • Fridays73% on time · p90 50 min · 249 flights
  • Tuesdays71% on time · p90 55 min · 225 flights
  • Saturdays65% on time · p90 60 min · 279 flights
  • Thursdays65% on time · p90 65 min · 248 flights
  • Sundays62% on time · p90 70 min · 256 flights
  • Mondays60% on time · p90 60 min · 252 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.