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Flight Reliability

UA 3537 · United Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and UA 3537 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

89%
Arrive within 15 minutes
5 min early
Average arrival delay
2.8%
Cancelled
16 min early
Median arrival delay

Based on 351 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon94%(49 flights)
  • Tue87%(45 flights)
  • Wed87%(46 flights)
  • Thu86%(51 flights)
  • Fri92%(49 flights)
  • Sat92%(48 flights)
  • Sun88%(51 flights)
On-time by departure window
  • 6–9 AM96%(155 flights)
  • 12–3 PM89%(28 flights)
  • 3–6 PM76%(67 flights)
  • 6–9 PM90%(38 flights)
  • 9 PM–12 AM88%(51 flights)
On-time trend by month
88%
May

Jun 100% → May 88% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 2025100%18
August 2025100%13
September 2025100%29
October 202597%31
November 202589%28
December 202560%30
January 202693%29
February 2026100%25
March 202679%29
April 202690%59
May 202688%48
Departures on time
91%
Diverted
0.6%
Flights flown
339
Months covered
11

Keep nerding

Based on 351 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.