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Flight Reliability

UA 4428 · United Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and UA 4428 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

67%
Arrive within 15 minutes
34 min
Average arrival delay
3.9%
Cancelled
1 min early
Median arrival delay

Based on 335 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon75%(48 flights)
  • Tue67%(49 flights)
  • Wed65%(48 flights)
  • Thu69%(42 flights)
  • Fri63%(46 flights)
  • Sat70%(43 flights)
  • Sun63%(46 flights)
On-time by departure window
  • 6–9 AM—(2 flights)
  • 9 AM–12 PM73%(160 flights)
  • 12–3 PM65%(54 flights)
  • 3–6 PM78%(23 flights)
  • 6–9 PM54%(83 flights)
On-time trend by month
81%
May

Jun 63% → May 81% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202563%27
July 202535%23
August 202582%22
September 202560%30
October 202580%10
November 202576%29
December 202550%30
January 202666%29
February 202682%28
March 202669%32
April 202671%31
May 202681%31
Departures on time
70%
Diverted
0%
Flights flown
322
Months covered
12

Keep nerding

Based on 335 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.