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Flight Reliability

UA 3451 · United Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and UA 3451 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

83%
Arrive within 15 minutes
1 min early
Average arrival delay
1.6%
Cancelled
14 min early
Median arrival delay

Based on 373 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon81%(59 flights)
  • Tue89%(45 flights)
  • Wed88%(51 flights)
  • Thu84%(57 flights)
  • Fri81%(58 flights)
  • Sat79%(43 flights)
  • Sun82%(54 flights)
On-time by departure window
  • 6–9 AM93%(58 flights)
  • 9 AM–12 PM81%(90 flights)
  • 12–3 PM86%(194 flights)
  • 3–6 PM—(5 flights)
  • 6–9 PM55%(20 flights)
On-time trend by month
97%
May

Jun 87% → May 97% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202587%30
July 202574%23
August 202588%33
September 202590%29
October 202562%21
November 202586%28
December 202578%27
January 202683%30
February 202679%28
March 202667%30
April 202690%31
May 202697%57
Departures on time
86%
Diverted
0%
Flights flown
367
Months covered
12

Keep nerding

Based on 373 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.