OnTimeStats

Historical on-time performance

Chicago to West Palm Beach

1,144 miData through Dec 2025Source: US DOT · BTS

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

On-time rate73%arrived within 15 min
p90 delay65 min1 in 10 flights is worse (tail risk)
Cancelled1.1%of scheduled flights

based on 1,159 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

  • American Airlines
    On-time69%
    Medianon time
    p9075 min
    Cancel1.8%
    Flights740
  • United Airlinesbest
    On-time80%
    Medianon time
    p9050 min
    Cancel0.0%
    Flights419

Why flights run late

Delay causes

  • Airline23%
  • Weather3%
  • Air traffic (NAS)27%
  • Late aircraft46%
  • 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 ORD → PBI

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 — 79% on time.

  • Mornings79% on time · p90 35 min · 951 flights
  • Middays73% on time · p90 70 min · 1,646 flights
  • Evenings70% on time · p90 75 min · 211 flights
  • Afternoons66% on time · p90 70 min · 70 flights · limited

Best day of week

Tuesdays are the most reliable day to fly this route — 86% on time.

  • Tuesdays86% on time · p90 35 min · 373 flights
  • Wednesdays76% on time · p90 55 min · 389 flights
  • Mondays76% on time · p90 50 min · 431 flights
  • Fridays75% on time · p90 65 min · 434 flights
  • Saturdays73% on time · p90 70 min · 406 flights
  • Thursdays73% on time · p90 55 min · 417 flights
  • Sundays67% on time · p90 75 min · 429 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.