OnTimeStats

Historical on-time performance

Houston to Springfield

513 miData through Dec 2025Source: US DOT · BTS

Flights on IAH–SGF arrive on time 70% of the time over the last 12 months.

On-time rate70%arrived within 15 min
p90 delay80 min1 in 10 flights is worse (tail risk)
Cancelled2.4%of scheduled flights

based on 500 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

  • SkyWest Airlines
    On-time70%
    Medianon time
    p9080 min
    Cancel2.4%
    Flights500

Why flights run late

Delay causes

  • Airline32%
  • Weather9%
  • Air traffic (NAS)11%
  • Late aircraft47%
  • Security1%

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 IAH → SGF

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

Best time of day

On-time rates are fairly even by time of day on this route — ranging from 68% to 74% on time.

  • Overnights74% on time · p90 45 min · 280 flights
  • Middays71% on time · p90 60 min · 230 flights
  • Afternoons69% on time · p90 105 min · 189 flights · limited
  • Evenings68% on time · p90 90 min · 69 flights · limited

Best day of week

On-time rates are fairly even by day on this route — ranging from 65% to 80% on time.

  • Saturdays80% on time · p90 40 min · 99 flights · limited
  • Tuesdays78% on time · p90 30 min · 103 flights · limited
  • Thursdays72% on time · p90 60 min · 115 flights · limited
  • Sundays70% on time · p90 90 min · 115 flights · limited
  • Fridays69% on time · p90 110 min · 114 flights · limited
  • Wednesdays66% on time · p90 80 min · 106 flights · limited
  • Mondays65% on time · p90 135 min · 116 flights · limited
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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.