OnTimeStats

Historical on-time performance

New York to Chicago

733 miData through May 2026Source: US DOT · BTS

Flights on LGA–ORD arrive on time 64% of the time over the last 12 months.

On-time rate64%arrived within 15 min
p90 delay90 min1 in 10 flights is worse (tail risk)
Cancelled4.8%of scheduled flights

based on 11,451 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.

  • Delta Air Lines
    On-time65%
    Medianon time
    p90100 min
    Cancel4.3%
    Flights2,289
  • United Airlines
    On-time64%
    Medianon time
    p9090 min
    Cancel3.5%
    Flights4,658
  • American Airlines
    On-time64%
    Medianon time
    p9090 min
    Cancel4.3%
    Flights2,935
  • Republic Airways
    On-time61%
    Medianon time
    p9060 min
    Cancel9.8%
    Flights1,237
  • Spirit Airlines
    On-time54%
    Median5 min
    p90130 min
    Cancel8.3%
    Flights288
  • SkyWest Airlines
    On-time36%
    Median15 min
    p90120 min
    Cancel25.0%
    Flights44

Why flights run late

Delay causes

  • Airline21%
  • Weather4%
  • Air traffic (NAS)35%
  • Late aircraft40%
  • Security0%

Most delay minutes here are attributed to Late aircraft.

When flights don't go

Why flights were cancelled

  • Airline21%
  • Weather62%
  • Air traffic (NAS)17%
  • Security0%

Most cancellations here are attributed to Weather. Shares are among 544 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 LGA → ORD

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 — 84% on time.

  • Mornings84% on time · p90 20 min · 10,058 flights
  • Middays79% on time · p90 40 min · 6,036 flights
  • Afternoons68% on time · p90 85 min · 6,669 flights
  • Overnights67% on time · p90 90 min · 3,473 flights
  • Evenings58% on time · p90 110 min · 6,501 flights

Best day of week

Saturdays are the most reliable day to fly this route — 78% on time.

  • Saturdays78% on time · p90 45 min · 3,121 flights
  • Tuesdays74% on time · p90 60 min · 5,001 flights
  • Thursdays74% on time · p90 65 min · 4,963 flights
  • Wednesdays73% on time · p90 70 min · 4,991 flights
  • Fridays72% on time · p90 65 min · 5,009 flights
  • Mondays71% on time · p90 75 min · 5,016 flights
  • Sundays68% on time · p90 75 min · 4,636 flights

Keep exploring

Related pages

Delay predictorfor this route→LGA airportNew York→ORD airportChicago→United Airlinesairline profile→American Airlinesairline profile→Delta Air Linesairline profile→Seasonal delay patternsguide→

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.