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Flight Reliability

UA 2156 · United Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and UA 2156 moved between routes during this period. Numbers below combine all of them, so treat them as background, not a verdict. For a cleaner answer, check the route you are actually flying.

Combined across all its routes

83%
Arrive within 15 minutes
2 min
Average arrival delay
0.4%
Cancelled
10 min early
Median arrival delay

Based on 478 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon77%(70 flights)
  • Tue89%(65 flights)
  • Wed91%(68 flights)
  • Thu76%(72 flights)
  • Fri81%(72 flights)
  • Sat88%(58 flights)
  • Sun80%(71 flights)
On-time by departure window
  • 9 AM–12 PM88%(202 flights)
  • 12–3 PM91%(217 flights)
  • 3–6 PM50%(12 flights)
  • 6–9 PM29%(45 flights)
On-time trend by month
91%
May

Aug 59% → May 91% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
August 202559%22
September 202571%35
October 202561%54
November 202597%60
December 202576%46
January 202678%60
February 202692%39
March 202693%55
April 202693%60
May 202691%45
Departures on time
83%
Diverted
0%
Flights flown
476
Months covered
10

Keep nerding

Based on 478 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.