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Flight Reliability

UA 6231 · United Airlines

Richmond → Houston (RIC–IAH)91% of its flights flew this route. The rest (IAH–ELP) are included in these numbers.

80
Pretty Reliable
WanderNerd Reliability Score
77%
Arrive within 15 minutes
14 min
Average arrival delay
0.6%
Cancelled
6 min early
Median arrival delay

Based on 342 historical flights. Data through May 2026.

What the data says

The late departure is the smart one here.

UA 6231 departing between 9 PM–12 AM arrived on time 90% of the time, versus 75% between 3–6 PM.

Saturdays have been rough.

UA 6231 arrived on time 91% of the time on Tuesdays and just 64% on Saturdays. That gap is worth planning around.

A bit behind the RIC–IAH route.

UA 6231 arrived on time 77% of the time, versus 83% across the RIC–IAH route.

Slipping a little lately.

UA 6231 arrived on time 83% of the time over the last three months in the data, compared with 89% in the three months before that.

The breakdown

On-time by weekday
  • Mon67%(52 flights)
  • Tue91%(46 flights)
  • Wed85%(46 flights)
  • Thu80%(49 flights)
  • Fri75%(51 flights)
  • Sat64%(45 flights)
  • Sun75%(51 flights)
On-time by departure window
  • 3–6 PM75%(309 flights)
  • 9 PM–12 AM90%(31 flights)
On-time trend by month
87%
May

Jun 41% → May 87% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202541%29
July 202557%30
August 202559%29
September 202589%26
October 202590%31
November 202572%29
December 202590%29
January 202685%20
February 202692%25
March 202674%31
April 202687%30
May 202687%31
Departures on time
75%
Diverted
0%
Flights flown
340
Months covered
12

Same route, other flights

Keep nerding

Based on 342 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.