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Flight Reliability

UA 2159 · United Airlines

Denver → Kansas City (DEN–MCI)89% of its flights flew this route. The rest (MCI–IAH, LAX–IAD) are included in these numbers.

95
Nerd Approved
WanderNerd Reliability Score
87%
Arrive within 15 minutes
1 min
Average arrival delay
0%
Cancelled
5 min early
Median arrival delay

Based on 384 historical flights. Data through May 2026.

What the data says

The late departure is the smart one here.

UA 2159 departing between 9 PM–12 AM arrived on time 90% of the time, versus 75% between 12–3 PM.

Saturday is the weak spot.

UA 2159 arrived on time 93% of the time on Wednesdays. On Saturdays: 84%.

Better than the DEN–MCI route average.

UA 2159 arrived on time 87% of the time, versus 76% across the DEN–MCI route.

Better than the United Airlines network average.

UA 2159 arrived on time 87% of the time, versus 79% across the United Airlines network.

The breakdown

On-time by weekday
  • Mon87%(55 flights)
  • Tue86%(55 flights)
  • Wed93%(54 flights)
  • Thu86%(55 flights)
  • Fri84%(55 flights)
  • Sat84%(55 flights)
  • Sun91%(55 flights)
On-time by departure window
  • 6–9 AM—(1 flights)
  • 9 AM–12 PM88%(344 flights)
  • 12–3 PM75%(20 flights)
  • 9 PM–12 AM90%(19 flights)
On-time trend by month
84%
May

Jun 77% → May 84% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202577%30
July 202597%31
August 202590%31
September 202593%30
October 202574%31
November 202597%30
December 202590%31
January 202681%31
February 202693%27
March 202681%31
April 202690%31
May 202684%50
Departures on time
88%
Diverted
0%
Flights flown
384
Months covered
12

Same route, other flights

Keep nerding

Based on 384 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.