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Flight Reliability

UA 403 · United Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and UA 403 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

57%
Arrive within 15 minutes
30 min
Average arrival delay
0.8%
Cancelled
11 min
Median arrival delay

Based on 516 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon55%(75 flights)
  • Tue61%(69 flights)
  • Wed65%(72 flights)
  • Thu65%(71 flights)
  • Fri59%(76 flights)
  • Sat53%(68 flights)
  • Sun45%(78 flights)
On-time by departure window
  • 6–9 AM77%(22 flights)
  • 9 AM–12 PM71%(133 flights)
  • 3–6 PM51%(248 flights)
  • 6–9 PM46%(50 flights)
  • 9 PM–12 AM55%(56 flights)
On-time trend by month
55%
May

Jun 57% → May 55% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202557%60
July 202539%31
August 202560%40
September 202571%28
October 202562%42
November 202548%87
December 202556%43
January 202663%35
February 202664%28
March 202669%29
April 202663%30
May 202655%56
Departures on time
72%
Diverted
0.6%
Flights flown
509
Months covered
12

Keep nerding

Based on 516 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.