Skip to content
WanderNerd
Check a flight

Flight Reliability

UA 6236 · United Airlines

Charlotte → Houston (CLT–IAH)82% of its flights flew this route. The rest (SBN–IAD, PHL–IAD) are included in these numbers.

92
Nerd Approved
WanderNerd Reliability Score
90%
Arrive within 15 minutes
7 min early
Average arrival delay
1.0%
Cancelled
12 min early
Median arrival delay

Based on 195 historical flights. Data through May 2026.

What the data says

Saturdays have been rough.

UA 6236 arrived on time 100% of the time on Mondays and just 81% on Saturdays. That gap is worth planning around.

Better than the CLT–IAH route average.

UA 6236 arrived on time 90% of the time, versus 79% across the CLT–IAH route.

Better than the United Airlines network average.

UA 6236 arrived on time 90% of the time, versus 79% across the United Airlines network.

Slipping a little lately.

UA 6236 arrived on time 89% of the time over the last three months in the data, compared with 94% in the three months before that.

The breakdown

On-time by weekday
  • Mon100%(28 flights)
  • Tue96%(27 flights)
  • Wed82%(28 flights)
  • Thu85%(27 flights)
  • Fri87%(31 flights)
  • Sat81%(21 flights)
  • Sun93%(30 flights)
On-time by departure window
  • 9 AM–12 PM89%(189 flights)
  • 3–6 PM—(2 flights)
  • 9 PM–12 AM—(1 flights)
On-time trend by month
79%
May

Aug 95% → May 79% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
August 202595%20
November 202593%30
December 202590%29
February 2026100%14
March 2026100%21
April 202689%26
May 202679%28
Departures on time
87%
Diverted
0.5%
Flights flown
192
Months covered
12

Same route, other flights

Keep nerding

Based on 195 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.