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Flight Reliability

UA 1311 · United Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and UA 1311 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

90%
Arrive within 15 minutes
5 min early
Average arrival delay
0.6%
Cancelled
11 min early
Median arrival delay

Based on 472 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon87%(67 flights)
  • Tue93%(69 flights)
  • Wed91%(70 flights)
  • Thu94%(68 flights)
  • Fri88%(68 flights)
  • Sat85%(58 flights)
  • Sun88%(69 flights)
On-time by departure window
  • 6–9 AM91%(321 flights)
  • 9 AM–12 PM—(3 flights)
  • 12–3 PM84%(121 flights)
  • 9 PM–12 AM92%(24 flights)
On-time trend by month
89%
May

Jun 97% → May 89% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202597%30
July 202583%30
August 202590%29
September 202592%26
October 202589%26
November 202563%30
December 202596%47
January 202686%56
February 202690%39
March 202694%34
April 202698%60
May 202689%62
Departures on time
88%
Diverted
0%
Flights flown
469
Months covered
12

Keep nerding

Based on 472 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.