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Flight Reliability

UA 2120 · United Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and UA 2120 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
0 min
Average arrival delay
0.6%
Cancelled
10 min early
Median arrival delay

Based on 657 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon89%(91 flights)
  • Tue85%(89 flights)
  • Wed89%(92 flights)
  • Thu83%(92 flights)
  • Fri79%(97 flights)
  • Sat83%(94 flights)
  • Sun87%(95 flights)
On-time by departure window
  • 6–9 AM100%(11 flights)
  • 9 AM–12 PM91%(298 flights)
  • 12–3 PM81%(305 flights)
  • 3–6 PM—(8 flights)
  • 6–9 PM75%(28 flights)
On-time trend by month
89%
May

Jun 84% → May 89% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202584%55
July 202594%31
August 202584%51
September 202589%36
October 202571%42
November 202581%80
December 202575%47
January 202685%60
February 202687%54
March 202692%62
April 202690%60
May 202689%72
Departures on time
86%
Diverted
0.5%
Flights flown
650
Months covered
12

Keep nerding

Based on 657 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.