Skip to content
WanderNerd
Check a flight

Flight Reliability

UA 2100 · United Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and UA 2100 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

86%
Arrive within 15 minutes
4 min
Average arrival delay
1.1%
Cancelled
8 min early
Median arrival delay

Based on 630 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon85%(89 flights)
  • Tue88%(88 flights)
  • Wed82%(89 flights)
  • Thu96%(90 flights)
  • Fri84%(88 flights)
  • Sat81%(85 flights)
  • Sun82%(91 flights)
On-time by departure window
  • 6–9 AM84%(248 flights)
  • 9 AM–12 PM85%(221 flights)
  • 12–3 PM87%(53 flights)
  • 3–6 PM92%(79 flights)
  • 9 PM–12 AM79%(19 flights)
On-time trend by month
80%
May

Jun 86% → May 80% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202586%64
July 202587%90
August 202588%80
September 202595%59
October 202576%62
November 202579%58
December 202583%47
January 202687%30
February 202684%25
March 202688%50
April 202693%30
May 202680%25
Departures on time
87%
Diverted
0.5%
Flights flown
620
Months covered
12

Keep nerding

Based on 630 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.