OnTimeStats

Historical on-time performance

New York to Chicago

725 miData through Dec 2025Source: US DOT · BTS

Flights on LGA–MDW arrive on time 72% of the time over the last 12 months.

On-time rate72%arrived within 15 min
p90 delay55 min1 in 10 flights is worse (tail risk)
Cancelled2.8%of scheduled flights

based on 2,354 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

  • Southwest Airlines
    On-time72%
    Medianon time
    p9055 min
    Cancel2.8%
    Flights2,354

Why flights run late

Delay causes

  • Airline19%
  • Weather6%
  • Air traffic (NAS)25%
  • Late aircraft51%
  • 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 LGA → MDW

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 — 88% on time.

  • Mornings88% on time · p90 15 min · 1,993 flights
  • Middays80% on time · p90 25 min · 1,122 flights
  • Afternoons71% on time · p90 50 min · 1,887 flights
  • Evenings65% on time · p90 75 min · 1,401 flights
  • Overnights62% on time · p90 70 min · 974 flights

Best day of week

On-time rates are fairly even by day on this route — ranging from 73% to 79% on time.

  • Saturdays79% on time · p90 35 min · 609 flights
  • Tuesdays76% on time · p90 40 min · 1,177 flights
  • Wednesdays76% on time · p90 40 min · 1,178 flights
  • Thursdays74% on time · p90 40 min · 1,146 flights
  • Mondays74% on time · p90 55 min · 1,159 flights
  • Fridays73% on time · p90 55 min · 1,152 flights
  • Sundays73% on time · p90 55 min · 956 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.