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Flight Reliability

UA 4854 · United Airlines

Knoxville → Houston (TYS–IAH)97% of its flights flew this route. The rest (IAD–SYR) are included in these numbers.

69
Usually Fine
WanderNerd Reliability Score
73%
Arrive within 15 minutes
18 min
Average arrival delay
1.2%
Cancelled
7 min early
Median arrival delay

Based on 334 historical flights. Data through May 2026.

What the data says

The late departure is the smart one here.

UA 4854 departing between 9 PM–12 AM arrived on time 82% of the time, versus 73% between 3–6 PM.

Tuesday is the weak spot.

UA 4854 arrived on time 79% of the time on Sundays. On Tuesdays: 68%.

Lagging the TYS–IAH route.

UA 4854 arrived on time 73% of the time, versus 82% across the TYS–IAH route.

A bit behind the United Airlines network.

UA 4854 arrived on time 73% of the time, versus 79% across the United Airlines network.

The breakdown

On-time by weekday
  • Mon75%(51 flights)
  • Tue68%(47 flights)
  • Wed76%(49 flights)
  • Thu71%(51 flights)
  • Fri69%(51 flights)
  • Sat77%(35 flights)
  • Sun79%(43 flights)
On-time by departure window
  • 3–6 PM73%(316 flights)
  • 9 PM–12 AM82%(11 flights)
On-time trend by month
71%
May

Jun 46% → May 71% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202546%28
July 202555%22
August 202568%22
September 202581%26
October 202567%30
November 202572%29
December 202578%27
January 202685%26
February 202692%26
March 202677%30
April 202683%30
May 202671%31
Departures on time
80%
Diverted
0.9%
Flights flown
327
Months covered
12

Same route, other flights

Keep nerding

Based on 334 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.