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Flight Reliability

UA 1183 · United Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and UA 1183 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
3 min
Average arrival delay
0.8%
Cancelled
7 min early
Median arrival delay

Based on 486 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon81%(68 flights)
  • Tue91%(67 flights)
  • Wed81%(69 flights)
  • Thu84%(70 flights)
  • Fri80%(71 flights)
  • Sat79%(65 flights)
  • Sun79%(72 flights)
On-time by departure window
  • 6–9 AM100%(37 flights)
  • 9 AM–12 PM91%(126 flights)
  • 12–3 PM90%(77 flights)
  • 3–6 PM75%(87 flights)
  • 6–9 PM73%(147 flights)
  • 9 PM–12 AM—(8 flights)
On-time trend by month
69%
May

Jun 70% → May 69% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202570%30
July 202543%30
August 202581%31
September 202587%30
October 202589%37
November 202597%60
December 202584%45
January 202683%36
February 202685%60
March 202691%34
April 202697%31
May 202669%58
Departures on time
80%
Diverted
0%
Flights flown
482
Months covered
12

Keep nerding

Based on 486 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.