OnTimeStats

Historical on-time performance

TYSORD

Knoxville to Chicago

475 miData through Dec 2025Source: US DOT · BTS

Flights on TYS–ORD arrive on time 67% of the time over the last 12 months.

On-time rate67%arrived within 15 min
Median delayon timetypical arrival
p90 delay85 min1 in 10 flights is worsetail risk
Cancelled2.8%of scheduled flights

based on 1,698 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

  • Republic Airways
    On-time80%
    Medianon time
    p9055 min
    Cancel1.4%
    Flights146
  • SkyWest Airlines
    On-time68%
    Medianon time
    p9075 min
    Cancel1.6%
    Flights689
  • United Airlinesbest
    On-time91%
    Medianon time
    p905 min
    Cancel2.8%
    Flights217
  • Envoy Air
    On-time68%
    Medianon time
    p9055 min
    Cancel0.0%
    Flights65
  • PSA Airlines
    On-time52%
    Median5 min
    p90160 min
    Cancel5.0%
    Flights581

Why flights run late

Delay causes

  • Airline33%
  • Weather10%
  • Air traffic (NAS)17%
  • Late aircraft40%
  • Security0%

Most delay minutes here are attributed to Late aircraft.

Over time

On-time trend

By season

On-time rate by month

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Keep exploring

Related pages

Delay predictorfor this route→TYS airportKnoxville→ORD airportChicago→Republic Airways on this routecarrier detail→Republic Airwaysairline profile→

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.