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Flight Reliability

UA 1247 · United Airlines

Denver → Portland (DEN–PDX)100% of its flights flew this route. The rest (HDN–DEN) are included in these numbers.

95
Nerd Approved
WanderNerd Reliability Score
88%
Arrive within 15 minutes
3 min early
Average arrival delay
0%
Cancelled
11 min early
Median arrival delay

Based on 364 historical flights. Data through May 2026.

What the data says

Skip Tuesday if you can.

UA 1247 arrived on time 92% of the time on Saturdays. On Tuesdays: 81%.

Better than the DEN–PDX route average.

UA 1247 arrived on time 88% of the time, versus 75% across the DEN–PDX route.

Better than the United Airlines network average.

UA 1247 arrived on time 88% of the time, versus 79% across the United Airlines network.

It basically never cancels.

Out of 364 scheduled flights, only 0.0% were cancelled.

The breakdown

On-time by weekday
  • Mon88%(51 flights)
  • Tue81%(52 flights)
  • Wed88%(51 flights)
  • Thu90%(52 flights)
  • Fri90%(52 flights)
  • Sat92%(52 flights)
  • Sun89%(53 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 202597%31
August 202597%31
September 202590%30
October 202590%31
November 202587%30
December 202573%30
January 202687%31
February 202696%27
March 202674%31
April 202687%30
May 202697%31
Departures on time
92%
Diverted
0.3%
Flights flown
363
Months covered
12

Same route, other flights

Keep nerding

Based on 364 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.