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Flight Reliability

UA 6148 · United Airlines

Houston → Raleigh–Durham (IAH–RDU)88% of its flights flew this route. The rest (CRP–IAH, IAH–TUL) are included in these numbers.

93
Nerd Approved
WanderNerd Reliability Score
91%
Arrive within 15 minutes
6 min early
Average arrival delay
1.6%
Cancelled
10 min early
Median arrival delay

Based on 318 historical flights. Data through May 2026.

What the data says

The 3–6 AM departure wins.

UA 6148 departing between 3–6 AM arrived on time 100% of the time, versus 82% between 9 AM–12 PM.

Friday is doing you no favors.

UA 6148 arrived on time 98% of the time on Wednesdays. On Fridays: 85%.

A bit ahead of the IAH–RDU route.

UA 6148 arrived on time 91% of the time, versus 85% across the IAH–RDU route.

Better than the United Airlines network average.

UA 6148 arrived on time 91% of the time, versus 79% across the United Airlines network.

The breakdown

On-time by weekday
  • Mon92%(48 flights)
  • Tue95%(42 flights)
  • Wed98%(42 flights)
  • Thu90%(49 flights)
  • Fri85%(48 flights)
  • Sat92%(36 flights)
  • Sun90%(48 flights)
On-time by departure window
  • 3–6 AM100%(31 flights)
  • 6–9 AM91%(260 flights)
  • 9 AM–12 PM82%(22 flights)
On-time trend by month
89%
May

Jun 90% → May 89% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202590%29
July 202594%31
August 202593%29
September 202592%26
October 2025100%31
November 202589%28
December 202579%29
January 202692%24
February 202691%22
April 202693%30
May 202689%26
Departures on time
90%
Diverted
0%
Flights flown
313
Months covered
12

Same route, other flights

Keep nerding

Based on 318 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.