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Flight Reliability

UA 5636 · United Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and UA 5636 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
1 min
Average arrival delay
2.5%
Cancelled
6 min early
Median arrival delay

Based on 314 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon83%(46 flights)
  • Tue98%(46 flights)
  • Wed85%(41 flights)
  • Thu88%(49 flights)
  • Fri82%(44 flights)
  • Sat91%(35 flights)
  • Sun84%(45 flights)
On-time by departure window
  • 6–9 AM96%(23 flights)
  • 9 AM–12 PM—(9 flights)
  • 3–6 PM66%(38 flights)
  • 6–9 PM90%(236 flights)
On-time trend by month
88%
May

Jun 87% → May 88% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202587%30
July 202587%30
August 202596%25
September 202594%18
October 202593%27
November 202586%22
December 202583%29
January 202696%22
February 202691%22
March 202662%26
April 202690%30
May 202688%25
Departures on time
89%
Diverted
0%
Flights flown
306
Months covered
12

Keep nerding

Based on 314 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.