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Flight Reliability

UA 1227 · United Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and UA 1227 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

84%
Arrive within 15 minutes
7 min
Average arrival delay
1.8%
Cancelled
10 min early
Median arrival delay

Based on 710 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon78%(98 flights)
  • Tue88%(101 flights)
  • Wed87%(97 flights)
  • Thu83%(99 flights)
  • Fri87%(100 flights)
  • Sat85%(96 flights)
  • Sun80%(103 flights)
On-time by departure window
  • 6–9 AM92%(117 flights)
  • 9 AM–12 PM91%(152 flights)
  • 12–3 PM77%(317 flights)
  • 6–9 PM84%(108 flights)
On-time trend by month
86%
May

Jun 88% → May 86% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202588%88
July 202588%91
August 202582%62
September 202589%36
October 202585%61
November 202582%55
December 202573%48
January 202670%30
February 202670%43
March 202688%60
April 202691%58
May 202686%62
Departures on time
85%
Diverted
0.4%
Flights flown
694
Months covered
12

Keep nerding

Based on 710 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.