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Flight Reliability

UA 6166 · United Airlines

Houston → Des Moines (IAH–DSM)

84
Pretty Reliable
WanderNerd Reliability Score
84%
Arrive within 15 minutes
1 min
Average arrival delay
1.4%
Cancelled
9 min early
Median arrival delay

Based on 364 historical flights. Data through May 2026.

What the data says

The 12–3 PM departure wins.

UA 6166 departing between 12–3 PM arrived on time 90% of the time, versus 81% between 9 AM–12 PM.

Friday comes out ahead.

A small edge: 87% on time on Fridays against 80% on Sundays.

A bit ahead of the IAH–DSM route.

UA 6166 arrived on time 84% of the time, versus 79% across the IAH–DSM route.

A bit ahead of the United Airlines network.

UA 6166 arrived on time 84% of the time, versus 79% across the United Airlines network.

The breakdown

On-time by weekday
  • Mon82%(50 flights)
  • Tue85%(52 flights)
  • Wed82%(50 flights)
  • Thu84%(51 flights)
  • Fri87%(52 flights)
  • Sat86%(51 flights)
  • Sun80%(51 flights)
On-time by departure window
  • 9 AM–12 PM81%(248 flights)
  • 12–3 PM90%(109 flights)
On-time trend by month
81%
May

Jun 67% → May 81% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202567%30
July 202587%31
August 202577%30
September 202587%30
October 202590%31
November 202582%28
December 202577%31
January 202697%29
February 202693%28
March 202676%29
April 202693%29
May 202681%31
Departures on time
87%
Diverted
0.5%
Flights flown
357
Months covered
12

Same route, other flights

Keep nerding

Based on 364 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.