Historical on-time performance
Chicago to Knoxville
475 miData through May 2026Source: US DOT · BTS
Flights on ORD–TYS arrive on time 62% of the time over the last 12 months.
On-time rate62%arrived within 15 min
p90 delay100 min1 in 10 flights is worse (tail risk)
Cancelled4.0%of scheduled flights
based on 1,893 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Envoy AirOn-time81%Medianon timep9020 minCancel0.0%Flights31
- Republic AirwaysOn-time77%Medianon timep9035 minCancel0.0%Flights61
- SkyWest AirlinesbestOn-time72%Medianon timep9055 minCancel2.1%Flights670
- United AirlinesOn-time58%Medianon timep90105 minCancel2.1%Flights237
- PSA AirlinesOn-time55%Medianon timep90160 minCancel6.4%Flights894
Why flights run late
Delay causes
- Airline23%
- Weather9%
- Air traffic (NAS)10%
- Late aircraft57%
- Security0%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline8%
- Weather79%
- Air traffic (NAS)13%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 76 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 → TYS
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 — 79% on time.
- Mornings79% on time · p90 40 min · 1,400 flights
- Middays75% on time · p90 55 min · 1,419 flights
- Afternoons70% on time · p90 55 min · 1,037 flights
- Overnights64% on time · p90 60 min · 261 flights
- Evenings61% on time · p90 100 min · 1,521 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 68% to 75% on time.
- Tuesdays75% on time · p90 55 min · 788 flights
- Saturdays74% on time · p90 55 min · 771 flights
- Wednesdays72% on time · p90 70 min · 799 flights
- Mondays70% on time · p90 75 min · 819 flights
- Sundays68% on time · p90 70 min · 813 flights
- Thursdays68% on time · p90 65 min · 824 flights
- Fridays68% on time · p90 70 min · 824 flights
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