OnTimeStats

Historical on-time performance

Chicago to Springfield

438 miData through Dec 2025Source: US DOT · BTS

Flights on ORD–SGF arrive on time 73% of the time over the last 12 months.

On-time rate73%arrived within 15 min
p90 delay60 min1 in 10 flights is worse (tail risk)
Cancelled1.4%of scheduled flights

based on 1,465 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

Too close to call — no single carrier is clearly more on-time here.

  • Envoy Air
    On-time73%
    Medianon time
    p9050 min
    Cancel0.9%
    Flights874
  • SkyWest Airlines
    On-time72%
    Medianon time
    p9070 min
    Cancel2.0%
    Flights591

Why flights run late

Delay causes

  • Airline28%
  • Weather10%
  • Air traffic (NAS)20%
  • Late aircraft41%
  • 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 ORD → SGF

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 — 81% on time.

  • Mornings81% on time · p90 25 min · 1,119 flights
  • Middays77% on time · p90 45 min · 1,226 flights
  • Afternoons74% on time · p90 55 min · 656 flights
  • Evenings69% on time · p90 65 min · 1,268 flights
  • Overnights63% on time · p90 70 min · 489 flights

Best day of week

On-time rates are fairly even by day on this route — ranging from 68% to 78% on time.

  • Saturdays78% on time · p90 35 min · 610 flights
  • Tuesdays77% on time · p90 40 min · 649 flights
  • Wednesdays76% on time · p90 45 min · 670 flights
  • Mondays76% on time · p90 60 min · 717 flights
  • Fridays73% on time · p90 55 min · 717 flights
  • Thursdays72% on time · p90 45 min · 713 flights
  • Sundays68% on time · p90 65 min · 682 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.