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Flight Reliability

UA 4302 · United Airlines

Knoxville → Houston (TYS–IAH)96% of its flights flew this route. The rest (IAD–BTV, BTV–IAD) are included in these numbers.

83
Pretty Reliable
WanderNerd Reliability Score
87%
Arrive within 15 minutes
3 min early
Average arrival delay
1.4%
Cancelled
19 min early
Median arrival delay

Based on 345 historical flights. Data through May 2026.

What the data says

Mornings have a slight edge.

Departures between 9 AM–12 PM arrived on time 88% of the time, against 85% between 12–3 PM.

Friday is doing you no favors.

UA 4302 arrived on time 92% of the time on Tuesdays. On Fridays: 81%.

A bit ahead of the TYS–IAH route.

UA 4302 arrived on time 87% of the time, versus 82% across the TYS–IAH route.

Better than the United Airlines network average.

UA 4302 arrived on time 87% of the time, versus 79% across the United Airlines network.

The breakdown

On-time by weekday
  • Mon83%(47 flights)
  • Tue92%(48 flights)
  • Wed89%(47 flights)
  • Thu90%(48 flights)
  • Fri81%(48 flights)
  • Sat88%(50 flights)
  • Sun83%(47 flights)
On-time by departure window
  • 9 AM–12 PM88%(180 flights)
  • 12–3 PM85%(143 flights)
  • 3–6 PM—(9 flights)
  • 6–9 PM—(3 flights)
On-time trend by month
92%
May

Jun 75% → May 92% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202575%28
July 202580%30
August 202581%31
September 202593%29
October 202594%31
November 202590%30
December 202584%31
January 202686%28
February 202693%28
March 202686%28
April 202690%29
May 202692%12
Departures on time
89%
Diverted
1.4%
Flights flown
335
Months covered
12

Same route, other flights

Keep nerding

Based on 345 historical flights, because apparently we checked. Historical flight data: U.S. Bureau of Transportation Statistics, June 2025 – May 2026. Data through May 2026. How we calculate this.