OnTimeStats

Historical on-time performance

Houston to Baltimore

1,246 miData through Dec 2025Source: US DOT · BTS

Flights on HOU–BWI arrive on time 77% of the time over the last 12 months.

On-time rate77%arrived within 15 min
p90 delay35 min1 in 10 flights is worse (tail risk)
Cancelled1.8%of scheduled flights

based on 1,468 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

  • Southwest Airlines
    On-time77%
    Medianon time
    p9035 min
    Cancel1.8%
    Flights1,468

Why flights run late

Delay causes

  • Airline30%
  • Weather7%
  • Air traffic (NAS)17%
  • Late aircraft45%
  • Security0%

Most delay minutes here are attributed to Late aircraft.

Over time

On-time trend

By season

On-time rate by month

When to fly

Best time to fly HOU → BWI

All airlines · rolling 36 months (2023-01 .. 2025-12).

Best time of day

Mornings are the most reliable time of day to fly this route — 92% on time.

  • Mornings92% on time · p90 10 min · 1,515 flights
  • Middays82% on time · p90 25 min · 710 flights
  • Evenings71% on time · p90 45 min · 690 flights
  • Afternoons69% on time · p90 45 min · 591 flights
  • Overnights68% on time · p90 55 min · 690 flights

Best day of week

On-time rates are fairly even by day on this route — ranging from 77% to 85% on time.

  • Tuesdays85% on time · p90 20 min · 582 flights
  • Wednesdays83% on time · p90 20 min · 579 flights
  • Mondays79% on time · p90 30 min · 599 flights
  • Saturdays79% on time · p90 35 min · 561 flights
  • Thursdays78% on time · p90 25 min · 588 flights
  • Sundays77% on time · p90 30 min · 693 flights
  • Fridays77% on time · p90 35 min · 594 flights
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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.