OnTimeStats

Historical on-time performance

Houston to Birmingham

562 miData through May 2026Source: US DOT · BTS

Flights on IAH–BHM arrive on time 58% of the time over the last 12 months.

On-time rate58%arrived within 15 min
p90 delay150 min1 in 10 flights is worse (tail risk)
Cancelled4.2%of scheduled flights

based on 48 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

  • SkyWest Airlines
    On-time58%
    Medianon time
    p90150 min
    Cancel4.2%
    Flights48

Why flights run late

Delay causes

  • Airline8%
  • Weather13%
  • Air traffic (NAS)13%
  • Late aircraft66%
  • Security0%

Most delay minutes here are attributed to Late aircraft.

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 2 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 IAH → BHM

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 65% to 78% on time.

  • Middays78% on time · p90 35 min · 169 flights · limited
  • Afternoons78% on time · p90 50 min · 266 flights
  • Evenings65% on time · p90 85 min · 247 flights

Best day of week

On-time rates are fairly even by day on this route — ranging from 61% to 80% on time.

  • Tuesdays80% on time · p90 30 min · 113 flights · limited
  • Saturdays80% on time · p90 30 min · 103 flights · limited
  • Sundays77% on time · p90 45 min · 115 flights · limited
  • Wednesdays72% on time · p90 55 min · 105 flights · limited
  • Fridays70% on time · p90 75 min · 108 flights · limited
  • Mondays61% on time · p90 100 min · 112 flights · limited

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.