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Flight Reliability

UA 4242 · United Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and UA 4242 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
8 min
Average arrival delay
1.9%
Cancelled
8 min early
Median arrival delay

Based on 314 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon74%(42 flights)
  • Tue83%(42 flights)
  • Wed86%(50 flights)
  • Thu92%(37 flights)
  • Fri80%(40 flights)
  • Sat83%(48 flights)
  • Sun81%(48 flights)
On-time by departure window
  • 6–9 AM80%(20 flights)
  • 9 AM–12 PM89%(47 flights)
  • 12–3 PM87%(96 flights)
  • 3–6 PM84%(82 flights)
  • 6–9 PM71%(62 flights)
On-time trend by month
87%
May

Jun 54% → May 87% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202554%26
July 202577%13
August 202581%21
September 2025100%29
October 202584%31
November 202578%27
December 202582%17
January 202692%24
February 202693%27
March 202681%31
April 202680%30
May 202687%31
Departures on time
83%
Diverted
0.3%
Flights flown
307
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.