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Flight Reliability

UA 2181 · United Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and UA 2181 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

69%
Arrive within 15 minutes
21 min
Average arrival delay
2.2%
Cancelled
1 min early
Median arrival delay

Based on 583 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon71%(80 flights)
  • Tue75%(77 flights)
  • Wed75%(77 flights)
  • Thu64%(85 flights)
  • Fri68%(87 flights)
  • Sat75%(68 flights)
  • Sun59%(87 flights)
On-time by departure window
  • 6–9 AM90%(93 flights)
  • 9 AM–12 PM87%(82 flights)
  • 12–3 PM65%(235 flights)
  • 3–6 PM67%(15 flights)
  • 6–9 PM52%(136 flights)
On-time trend by month
84%
May

Jun 59% → May 84% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202559%64
July 202566%80
August 202570%59
September 202583%35
October 202554%56
November 202550%58
December 202570%47
January 202688%17
February 202687%23
March 202669%32
April 202688%59
May 202684%31
Departures on time
71%
Diverted
1.5%
Flights flown
561
Months covered
12

Keep nerding

Based on 583 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.