Historical on-time performance
Washington to Knoxville
437 miData through Dec 2025Source: US DOT · BTS
Flights on DCA–TYS arrive on time 60% of the time over the last 12 months.
On-time rate60%arrived within 15 min
p90 delay100 min1 in 10 flights is worse (tail risk)
Cancelled5.3%of scheduled flights
based on 942 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Republic AirwaysbestOn-time80%Medianon timep9040 minCancel0.0%Flights30
- PSA AirlinesOn-time59%Medianon timep90100 minCancel5.5%Flights912
Why flights run late
Delay causes
- Airline21%
- Weather9%
- Air traffic (NAS)15%
- 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 DCA → 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 56% to 85% on time.
- Mornings85% on time · p90 25 min · 1,013 flights
- Middays83% on time · p90 30 min · 378 flights
- Evenings67% on time · p90 80 min · 929 flights
- Afternoons66% on time · p90 75 min · 654 flights
- Overnights56% on time · p90 115 min · 246 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 69% to 79% on time.
- Saturdays79% on time · p90 45 min · 347 flights
- Tuesdays76% on time · p90 55 min · 490 flights
- Wednesdays74% on time · p90 50 min · 491 flights
- Mondays74% on time · p90 65 min · 491 flights
- Thursdays73% on time · p90 65 min · 478 flights
- Fridays71% on time · p90 70 min · 484 flights
- Sundays69% on time · p90 80 min · 439 flights
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