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Flight Reliability

UA 4347 · United Airlines

Houston → JAN (IAH–JAN)

91
Nerd Approved
WanderNerd Reliability Score
88%
Arrive within 15 minutes
3 min early
Average arrival delay
0.9%
Cancelled
14 min early
Median arrival delay

Based on 340 historical flights. Data through May 2026.

What the data says

Saturdays have been rough.

UA 4347 arrived on time 98% of the time on Thursdays and just 80% on Saturdays. That gap is worth planning around.

A bit ahead of the IAH–JAN route.

UA 4347 arrived on time 88% of the time, versus 81% across the IAH–JAN route.

Better than the United Airlines network average.

UA 4347 arrived on time 88% of the time, versus 79% across the United Airlines network.

Recent months have been rougher.

UA 4347 arrived on time 85% of the time over the last three months in the data, compared with 93% in the three months before that.

The breakdown

On-time by weekday
  • Mon86%(51 flights)
  • Tue91%(46 flights)
  • Wed86%(49 flights)
  • Thu98%(50 flights)
  • Fri83%(52 flights)
  • Sat80%(39 flights)
  • Sun90%(49 flights)
On-time trend by month
86%
May

Jun 83% → May 86% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202583%29
July 202581%31
August 202594%31
September 202593%29
October 202592%25
November 202581%26
December 202582%27
January 202697%30
February 2026100%21
March 202683%29
April 202687%30
May 202686%28
Departures on time
87%
Diverted
0.3%
Flights flown
336
Months covered
12

Same route, other flights

Keep nerding

Based on 340 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.