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Flight Reliability

UA 642 · United Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and UA 642 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

83%
Arrive within 15 minutes
3 min
Average arrival delay
0.9%
Cancelled
11 min early
Median arrival delay

Based on 321 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon86%(49 flights)
  • Tue88%(41 flights)
  • Wed76%(41 flights)
  • Thu88%(50 flights)
  • Fri82%(49 flights)
  • Sat85%(39 flights)
  • Sun80%(49 flights)
On-time by departure window
  • 6–9 AM91%(33 flights)
  • 9 AM–12 PM—(8 flights)
  • 12–3 PM86%(140 flights)
  • 3–6 PM75%(24 flights)
  • 6–9 PM72%(82 flights)
  • 9 PM–12 AM100%(31 flights)
On-time trend by month
76%
May

Jun 53% → May 76% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202553%17
July 202594%17
August 202595%19
September 202596%27
October 2025100%31
November 202580%30
December 202587%31
January 202687%30
February 202677%26
March 202674%31
April 202677%30
May 202676%29
Departures on time
82%
Diverted
0%
Flights flown
318
Months covered
12

Keep nerding

Based on 321 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.