OnTimeStats

Historical on-time performance

Chicago to Springfield

438 miData through May 2026Source: 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)
Cancelled1.5%of scheduled flights

based on 1,366 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-time74%
    Medianon time
    p9050 min
    Cancel1.4%
    Flights1,084
  • SkyWest Airlines
    On-time69%
    Medianon time
    p9080 min
    Cancel1.8%
    Flights282

Why flights run late

Delay causes

  • Airline24%
  • Weather11%
  • Air traffic (NAS)19%
  • Late aircraft46%
  • Security0%

Most delay minutes here are attributed to Late aircraft.

When flights don't go

Why flights were cancelled

  • Airline0%
  • Weather70%
  • Air traffic (NAS)30%
  • Security0%

Most cancellations here are attributed to Weather. Shares are among 20 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 ORD → SGF

All airlines · rolling 36 months (2023-06 .. 2026-05).

Best time of day

Mornings are the most reliable time of day to fly this route — 79% on time.

  • Mornings79% on time · p90 35 min · 1,074 flights
  • Middays76% on time · p90 50 min · 1,102 flights
  • Afternoons74% on time · p90 55 min · 741 flights
  • Evenings69% on time · p90 65 min · 1,235 flights
  • Overnights65% on time · p90 70 min · 541 flights

Best day of week

On-time rates are fairly even by day on this route — ranging from 69% to 77% on time.

  • Saturdays77% on time · p90 35 min · 601 flights
  • Tuesdays76% on time · p90 40 min · 625 flights
  • Wednesdays74% on time · p90 50 min · 667 flights
  • Mondays74% on time · p90 65 min · 706 flights
  • Thursdays72% on time · p90 45 min · 705 flights
  • Fridays72% on time · p90 55 min · 711 flights
  • Sundays69% on time · p90 70 min · 678 flights

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.