Skip to content
WanderNerd
Check a flight

Flight Reliability

UA 1321 · United Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and UA 1321 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

85%
Arrive within 15 minutes
1 min early
Average arrival delay
1.1%
Cancelled
11 min early
Median arrival delay

Based on 541 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon95%(78 flights)
  • Tue85%(74 flights)
  • Wed91%(75 flights)
  • Thu83%(76 flights)
  • Fri81%(77 flights)
  • Sat82%(76 flights)
  • Sun82%(79 flights)
On-time by departure window
  • 6–9 AM95%(205 flights)
  • 9 AM–12 PM86%(199 flights)
  • 12–3 PM70%(119 flights)
  • 3–6 PM67%(12 flights)
On-time trend by month
91%
May

Jun 91% → May 91% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202591%55
July 202583%30
August 202594%31
September 202585%33
October 202578%37
November 202585%60
December 202574%72
January 202660%10
February 202682%33
March 202690%60
April 202693%60
May 202691%54
Departures on time
87%
Diverted
0%
Flights flown
535
Months covered
12

Keep nerding

Based on 541 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.