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Flight Reliability

UA 303 · United Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and UA 303 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

73%
Arrive within 15 minutes
14 min
Average arrival delay
1.4%
Cancelled
1 min
Median arrival delay

Based on 493 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon73%(69 flights)
  • Tue79%(70 flights)
  • Wed79%(70 flights)
  • Thu76%(70 flights)
  • Fri67%(69 flights)
  • Sat71%(69 flights)
  • Sun70%(69 flights)
On-time by departure window
  • 6–9 AM81%(110 flights)
  • 9 AM–12 PM76%(50 flights)
  • 12–3 PM75%(47 flights)
  • 3–6 PM76%(137 flights)
  • 6–9 PM64%(141 flights)
  • 9 PM–12 AM—(1 flights)
On-time trend by month
64%
May

Jun 80% → May 64% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202580%55
July 202574%31
August 202568%31
September 202572%36
October 202564%56
November 202580%30
December 202570%30
January 202680%56
February 202692%39
March 202660%52
April 202679%28
May 202664%42
Departures on time
79%
Diverted
0%
Flights flown
486
Months covered
12

Keep nerding

Based on 493 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.