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Flight Reliability

UA 6331 · United Airlines

Norfolk → Houston (ORF–IAH)

95
Nerd Approved
WanderNerd Reliability Score
95%
Arrive within 15 minutes
17 min early
Average arrival delay
1.0%
Cancelled
22 min early
Median arrival delay

Based on 98 historical flights. Data through May 2026.

What the data says

Sunday scaries are real for this one.

UA 6331 arrived on time 100% of the time on Thursdays. On Sundays: 92%.

A bit ahead of the ORF–IAH route.

UA 6331 arrived on time 95% of the time, versus 91% across the ORF–IAH route.

Well ahead of the United Airlines network.

UA 6331 arrived on time 95% of the time, versus 79% across the United Airlines network.

The breakdown

On-time by weekday
  • Mon93%(14 flights)
  • Tue93%(14 flights)
  • Wed92%(13 flights)
  • Thu100%(14 flights)
  • Fri100%(14 flights)
  • Sat93%(14 flights)
  • Sun92%(13 flights)
On-time trend by month
95%
May

Feb 94% → May 95% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
February 202694%17
March 202697%29
April 202693%30
May 202695%20
Departures on time
97%
Diverted
1.0%
Flights flown
96
Months covered
4

Same route, other flights

Keep nerding

Based on 98 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.