OnTimeStats

Historical on-time performance

Tucson to Chicago

1,437 miData through May 2026Source: US DOT · BTS

Flights on TUS–ORD arrive on time 72% of the time over the last 12 months.

On-time rate72%arrived within 15 min
p90 delay60 min1 in 10 flights is worse (tail risk)
Cancelled1.8%of scheduled flights

based on 844 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.

  • SkyWest Airlines
    On-time75%
    Medianon time
    p9035 min
    Cancel1.6%
    Flights449
  • American Airlines
    On-time69%
    Medianon time
    p9085 min
    Cancel2.0%
    Flights395

Why flights run late

Delay causes

  • Airline37%
  • Weather4%
  • Air traffic (NAS)21%
  • Late aircraft37%
  • Security0%

Most delay minutes here are attributed to Airline.

When flights don't go

Why flights were cancelled

  • Airline0%
  • Weather93%
  • Air traffic (NAS)7%
  • Security0%

Most cancellations here are attributed to Weather. Shares are among 15 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 TUS → 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 — 89% on time.

  • Mornings89% on time · p90 10 min · 1,063 flights
  • Middays76% on time · p90 50 min · 1,694 flights
  • Afternoons73% on time · p90 90 min · 133 flights · limited

Best day of week

On-time rates are fairly even by day on this route — ranging from 78% to 85% on time.

  • Saturdays85% on time · p90 25 min · 416 flights
  • Thursdays82% on time · p90 30 min · 433 flights
  • Fridays81% on time · p90 30 min · 443 flights
  • Tuesdays81% on time · p90 45 min · 392 flights
  • Sundays81% on time · p90 30 min · 447 flights
  • Wednesdays80% on time · p90 60 min · 402 flights
  • Mondays78% on time · p90 55 min · 423 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.