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Flight Reliability

UA 1537 · United Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and UA 1537 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

87%
Arrive within 15 minutes
2 min early
Average arrival delay
0.6%
Cancelled
9 min early
Median arrival delay

Based on 498 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon87%(69 flights)
  • Tue94%(72 flights)
  • Wed89%(70 flights)
  • Thu86%(71 flights)
  • Fri87%(71 flights)
  • Sat82%(66 flights)
  • Sun85%(73 flights)
On-time by departure window
  • 6–9 AM93%(43 flights)
  • 9 AM–12 PM91%(173 flights)
  • 12–3 PM86%(246 flights)
  • 6–9 PM70%(30 flights)
On-time trend by month
88%
May

Jun 85% → May 88% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202585%34
July 202592%62
August 202591%44
September 202594%53
October 202594%31
November 202593%30
December 202578%27
January 202680%56
February 202686%56
March 202687%31
April 202671%28
May 202688%40
Departures on time
87%
Diverted
0.6%
Flights flown
492
Months covered
12

Keep nerding

Based on 498 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.