OnTimeStats

Historical on-time performance

Atlanta to Houston

689 miData through Dec 2025Source: US DOT · BTS

Flights on ATL–IAH arrive on time 72% of the time over the last 12 months.

On-time rate72%arrived within 15 min
Median delayon timetypical arrival
p90 delay60 min1 in 10 flights is worsetail risk
Cancelled1.7%of scheduled flights

based on 4,515 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

  • United Airlinesbest
    On-time80%
    Medianon time
    p9035 min
    Cancel1.4%
    Flights951
  • Delta Air Lines
    On-time73%
    Medianon time
    p9045 min
    Cancel1.9%
    Flights2,404
  • Spirit Airlines
    On-time66%
    Medianon time
    p9075 min
    Cancel2.0%
    Flights555
  • Frontier Airlines
    On-time61%
    Medianon time
    p90120 min
    Cancel1.7%
    Flights605

Why flights run late

Delay causes

  • Airline35%
  • Weather5%
  • Air traffic (NAS)27%
  • Late aircraft32%
  • Security0%

Most delay minutes here are attributed to Airline.

Over time

On-time trend

By season

On-time rate by month

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Keep exploring

Related pages

Delay predictorfor this route→ATL airportAtlanta→IAH airportHouston→Mesa Airlines on this routecarrier detail→Mesa Airlinesairline profile→

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.