OnTimeStats

Historical on-time performance

Memphis to Houston

469 miData through May 2026Source: US DOT · BTS

Flights on MEM–IAH arrive on time 77% of the time over the last 12 months.

On-time rate77%arrived within 15 min
p90 delay45 min1 in 10 flights is worse (tail risk)
Cancelled1.1%of scheduled flights

based on 987 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

  • United Airlinesbest
    On-time83%
    Medianon time
    p9020 min
    Cancel2.0%
    Flights248
  • SkyWest Airlines
    On-time76%
    Medianon time
    p9050 min
    Cancel0.8%
    Flights739

Why flights run late

Delay causes

  • Airline29%
  • Weather13%
  • Air traffic (NAS)31%
  • Late aircraft27%
  • Security0%

Most delay minutes here are attributed to Air traffic (NAS).

When flights don't go

Why flights were cancelled

  • Airline0%
  • Weather100%
  • Air traffic (NAS)0%
  • Security0%

Most cancellations here are attributed to Weather. Shares are among 11 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 MEM → IAH

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 71% to 81% on time.

  • Mornings81% on time · p90 25 min · 1,181 flights
  • Middays81% on time · p90 40 min · 420 flights
  • Evenings73% on time · p90 35 min · 118 flights · limited
  • Afternoons71% on time · p90 60 min · 448 flights

Best day of week

On-time rates are fairly even by day on this route — ranging from 73% to 84% on time.

  • Tuesdays84% on time · p90 20 min · 295 flights
  • Mondays80% on time · p90 35 min · 326 flights
  • Thursdays79% on time · p90 40 min · 317 flights
  • Saturdays78% on time · p90 50 min · 300 flights
  • Wednesdays78% on time · p90 35 min · 304 flights
  • Sundays77% on time · p90 35 min · 315 flights
  • Fridays73% on time · p90 50 min · 310 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.