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Flight Reliability

UA 3403 · United Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and UA 3403 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

80%
Arrive within 15 minutes
10 min
Average arrival delay
6.1%
Cancelled
13 min early
Median arrival delay

Based on 377 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon86%(50 flights)
  • Tue80%(49 flights)
  • Wed74%(49 flights)
  • Thu72%(53 flights)
  • Fri84%(55 flights)
  • Sat85%(53 flights)
  • Sun78%(45 flights)
On-time by departure window
  • 6–9 AM—(4 flights)
  • 9 AM–12 PM—(8 flights)
  • 3–6 PM66%(64 flights)
  • 6–9 PM83%(278 flights)
On-time trend by month
87%
May

Jun 73% → May 87% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202573%15
July 202546%24
August 202565%34
September 202583%30
October 202583%30
November 202585%27
December 202572%29
January 202690%41
February 202697%32
March 202671%31
April 202690%30
May 202687%31
Departures on time
81%
Diverted
0%
Flights flown
354
Months covered
12

Keep nerding

Based on 377 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.