Historical on-time performance
Chicago to Knoxville
475 miData through Dec 2025Source: US DOT · BTS
Flights on ORD–TYS arrive on time 66% of the time over the last 12 months.
On-time rate66%arrived within 15 min
p90 delay85 min1 in 10 flights is worse (tail risk)
Cancelled2.7%of scheduled flights
based on 1,699 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 AirwaysOn-time81%Medianon timep9025 minCancel1.4%Flights147
- SkyWest AirlinesOn-time74%Medianon timep9050 minCancel1.5%Flights689
- Envoy AirOn-time68%Medianon timep9030 minCancel0.0%Flights65
- United AirlinesOn-time57%Medianon timep90105 minCancel2.8%Flights217
- PSA AirlinesOn-time56%Medianon timep90155 minCancel4.8%Flights581
Why flights run late
Delay causes
- Airline25%
- Weather9%
- Air traffic (NAS)12%
- Late aircraft55%
- Security0%
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 → TYS
All airlines · rolling 36 months (2023-01 .. 2025-12).
Best time of day
On-time rates are fairly even by time of day on this route — ranging from 64% to 79% on time.
- Mornings79% on time · p90 35 min · 1,396 flights
- Middays77% on time · p90 50 min · 1,326 flights
- Afternoons70% on time · p90 55 min · 966 flights
- Overnights67% on time · p90 60 min · 308 flights
- Evenings64% on time · p90 100 min · 1,262 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 69% to 78% on time.
- Tuesdays78% on time · p90 45 min · 731 flights
- Mondays75% on time · p90 55 min · 769 flights
- Saturdays75% on time · p90 55 min · 734 flights
- Wednesdays74% on time · p90 65 min · 746 flights
- Fridays70% on time · p90 60 min · 763 flights
- Sundays69% on time · p90 65 min · 755 flights
- Thursdays69% on time · p90 65 min · 760 flights
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