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Flight Reliability

UA 2403 · United Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and UA 2403 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

82%
Arrive within 15 minutes
0 min
Average arrival delay
0.3%
Cancelled
8 min early
Median arrival delay

Based on 355 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon74%(57 flights)
  • Tue90%(39 flights)
  • Wed94%(50 flights)
  • Thu77%(56 flights)
  • Fri78%(58 flights)
  • Sat83%(35 flights)
  • Sun85%(58 flights)
On-time by departure window
  • 9 AM–12 PM83%(116 flights)
  • 12–3 PM77%(51 flights)
  • 3–6 PM89%(70 flights)
  • 6–9 PM80%(116 flights)
On-time trend by month
91%
May

Jun 77% → May 91% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202577%30
July 202577%31
August 202584%31
September 202591%35
October 202581%48
November 202580%20
December 202574%31
January 202690%30
February 202691%23
March 202663%19
April 202677%22
May 202691%33
Departures on time
83%
Diverted
0.3%
Flights flown
353
Months covered
12

Keep nerding

Based on 355 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.