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Flight Reliability

UA 4037 · United Airlines

Houston → Kansas City (IAH–MCI)82% of its flights flew this route. The rest (IAH–TYS, IAH–BNA) are included in these numbers.

92
Nerd Approved
WanderNerd Reliability Score
89%
Arrive within 15 minutes
5 min early
Average arrival delay
1.2%
Cancelled
12 min early
Median arrival delay

Based on 162 historical flights. Data through May 2026.

What the data says

The 9 AM–12 PM departure wins.

UA 4037 departing between 9 AM–12 PM arrived on time 90% of the time, versus 82% between 6–9 AM.

Skip Tuesday if you can.

UA 4037 arrived on time 93% of the time on Wednesdays. On Tuesdays: 82%.

A bit ahead of the IAH–MCI route.

UA 4037 arrived on time 89% of the time, versus 83% across the IAH–MCI route.

Better than the United Airlines network average.

UA 4037 arrived on time 89% of the time, versus 79% across the United Airlines network.

The breakdown

On-time by weekday
  • Mon88%(24 flights)
  • Tue82%(27 flights)
  • Wed93%(27 flights)
  • Thu92%(25 flights)
  • Fri88%(25 flights)
  • Sat92%(12 flights)
  • Sun90%(20 flights)
On-time by departure window
  • 6–9 AM82%(11 flights)
  • 9 AM–12 PM90%(135 flights)
  • 12–3 PM—(8 flights)
  • 3–6 PM—(6 flights)
On-time trend by month
83%
May

Oct 67% → May 83% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
October 202567%12
November 2025100%20
December 202577%17
January 202684%25
February 2026100%28
March 202685%20
April 202696%25
May 202683%12
Departures on time
90%
Diverted
0%
Flights flown
160
Months covered
9

Same route, other flights

Keep nerding

Based on 162 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.