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Flight Reliability

UA 5039 · United Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and UA 5039 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

76%
Arrive within 15 minutes
14 min
Average arrival delay
0.9%
Cancelled
5 min early
Median arrival delay

Based on 432 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon76%(72 flights)
  • Tue78%(32 flights)
  • Wed83%(48 flights)
  • Thu77%(70 flights)
  • Fri75%(69 flights)
  • Sat71%(61 flights)
  • Sun72%(72 flights)
On-time by departure window
  • 6–9 AM86%(22 flights)
  • 9 AM–12 PM85%(20 flights)
  • 12–3 PM78%(190 flights)
  • 3–6 PM66%(110 flights)
  • 6–9 PM79%(82 flights)
On-time trend by month
74%
May

Jun 86% → May 74% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202586%71
July 202566%61
August 202568%37
September 202592%26
October 202589%47
November 202581%21
December 202544%25
January 202661%23
February 202680%25
March 202675%24
April 202680%30
May 202674%34
Departures on time
80%
Diverted
0.9%
Flights flown
424
Months covered
12

Keep nerding

Based on 432 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.