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Flight Reliability

UA 4887 · United Airlines

Houston → Knoxville (IAH–TYS)90% of its flights flew this route. The rest (CRP–IAH) are included in these numbers.

91
Nerd Approved
WanderNerd Reliability Score
87%
Arrive within 15 minutes
2 min early
Average arrival delay
0.6%
Cancelled
11 min early
Median arrival delay

Based on 350 historical flights. Data through May 2026.

What the data says

Friday is doing you no favors.

UA 4887 arrived on time 96% of the time on Wednesdays and just 80% on Fridays. That gap is worth planning around.

A bit ahead of the IAH–TYS route.

UA 4887 arrived on time 87% of the time, versus 81% across the IAH–TYS route.

Better than the United Airlines network average.

UA 4887 arrived on time 87% of the time, versus 79% across the United Airlines network.

Ticking up lately.

UA 4887 arrived on time 90% of the time over the last three months in the data, compared with 85% in the three months before that.

The breakdown

On-time by weekday
  • Mon86%(50 flights)
  • Tue90%(50 flights)
  • Wed96%(49 flights)
  • Thu90%(49 flights)
  • Fri80%(50 flights)
  • Sat82%(50 flights)
  • Sun84%(49 flights)
On-time by departure window
  • 6–9 AM85%(54 flights)
  • 9 AM–12 PM87%(293 flights)
On-time trend by month
85%
May

Jun 87% → May 85% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202587%30
July 202584%31
August 202584%31
September 202593%30
October 202587%30
November 202580%30
December 202581%31
January 202687%30
February 202689%26
March 202693%29
April 202693%29
May 202685%20
Departures on time
87%
Diverted
0.3%
Flights flown
347
Months covered
12

Same route, other flights

Keep nerding

Based on 350 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.