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Flight Reliability

UA 1959 · United Airlines

Anchorage → Denver (ANC–DEN)99% of its flights flew this route. The rest (DEN–IND, IAD–ORD) are included in these numbers.

93
Nerd Approved
WanderNerd Reliability Score
87%
Arrive within 15 minutes
2 min early
Average arrival delay
0.6%
Cancelled
13 min early
Median arrival delay

Based on 351 historical flights. Data through May 2026.

What the data says

Sunday scaries are real for this one.

UA 1959 arrived on time 94% of the time on Tuesdays. On Sundays: 80%.

Better than the United Airlines network average.

UA 1959 arrived on time 87% of the time, versus 79% across the United Airlines network.

Ticking up lately.

UA 1959 arrived on time 88% of the time over the last three months in the data, compared with 84% in the three months before that.

The breakdown

On-time by weekday
  • Mon92%(51 flights)
  • Tue94%(47 flights)
  • Wed82%(49 flights)
  • Thu84%(51 flights)
  • Fri86%(51 flights)
  • Sat92%(49 flights)
  • Sun80%(51 flights)
On-time by departure window
  • 3–6 AM—(9 flights)
  • 12–3 PM—(3 flights)
  • 6–9 PM—(1 flights)
  • 9 PM–12 AM87%(336 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 202584%31
August 202587%31
September 202593%30
October 202594%31
November 202583%30
December 202581%31
January 202684%19
February 202688%25
March 202671%31
April 202697%29
May 202697%31
Departures on time
83%
Diverted
0%
Flights flown
349
Months covered
12

Same route, other flights

Keep nerding

Based on 351 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.