OnTimeStats

Historical on-time performance

Chicago to Jacksonville

864 miData through May 2026Source: US DOT · BTS

Flights on ORD–JAX arrive on time 71% of the time over the last 12 months.

On-time rate71%arrived within 15 min
p90 delay65 min1 in 10 flights is worse (tail risk)
Cancelled1.2%of scheduled flights

based on 1,747 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.

  • Republic Airways
    On-time77%
    Medianon time
    p9050 min
    Cancel2.6%
    Flights273
  • SkyWest Airlines
    On-time75%
    Medianon time
    p9090 min
    Cancel0.0%
    Flights36
  • United Airlines
    On-time73%
    Medianon time
    p9060 min
    Cancel0.4%
    Flights892
  • Envoy Air
    On-time68%
    Medianon time
    p9060 min
    Cancel0.0%
    Flights151
  • American Airlines
    On-time62%
    Medianon time
    p90105 min
    Cancel2.5%
    Flights395

Why flights run late

Delay causes

  • Airline22%
  • Weather5%
  • Air traffic (NAS)16%
  • Late aircraft58%
  • Security0%

Most delay minutes here are attributed to Late aircraft.

When flights don't go

Why flights were cancelled

  • Airline14%
  • Weather57%
  • Air traffic (NAS)29%
  • Security0%

Most cancellations here are attributed to Weather. Shares are among 21 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 → JAX

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

Best time of day

On-time rates are fairly even by time of day on this route — ranging from 67% to 84% on time.

  • Mornings84% on time · p90 25 min · 1,685 flights
  • Afternoons81% on time · p90 35 min · 507 flights
  • Middays78% on time · p90 50 min · 958 flights
  • Evenings67% on time · p90 75 min · 1,956 flights

Best day of week

On-time rates are fairly even by day on this route — ranging from 71% to 80% on time.

  • Tuesdays80% on time · p90 40 min · 679 flights
  • Wednesdays78% on time · p90 35 min · 687 flights
  • Thursdays78% on time · p90 45 min · 777 flights
  • Saturdays77% on time · p90 45 min · 711 flights
  • Mondays75% on time · p90 55 min · 775 flights
  • Sundays73% on time · p90 60 min · 783 flights
  • Fridays71% on time · p90 55 min · 773 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.