Skip to content
WanderNerd
Check a flight

Flight Reliability

UA 1291 · United Airlines

Las Vegas → Denver (LAS–DEN)82% of its flights flew this route. The rest (ORD–IAH, DEN–BUR) are included in these numbers.

76
Usually Fine
WanderNerd Reliability Score
74%
Arrive within 15 minutes
6 min
Average arrival delay
1.5%
Cancelled
10 min early
Median arrival delay

Based on 268 historical flights. Data through May 2026.

What the data says

The late departure is the smart one here.

UA 1291 departing between 6–9 PM arrived on time 78% of the time, versus 46% between 9 PM–12 AM.

Sunday scaries are real for this one.

UA 1291 arrived on time 90% of the time on Tuesdays and just 60% on Sundays. That gap is worth planning around.

A bit behind the LAS–DEN route.

UA 1291 arrived on time 74% of the time, versus 77% across the LAS–DEN route.

A bit behind the United Airlines network.

UA 1291 arrived on time 74% of the time, versus 79% across the United Airlines network.

The breakdown

On-time by weekday
  • Mon79%(33 flights)
  • Tue90%(10 flights)
  • Wed86%(49 flights)
  • Thu74%(49 flights)
  • Fri69%(49 flights)
  • Sat73%(22 flights)
  • Sun60%(52 flights)
On-time by departure window
  • 12–3 PM—(6 flights)
  • 6–9 PM78%(217 flights)
  • 9 PM–12 AM46%(41 flights)
On-time trend by month
73%
May

Jun 60% → May 73% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202560%30
July 202540%20
August 202550%22
September 202555%22
October 202593%29
November 202576%21
December 202591%23
January 202680%20
February 202682%17
March 202688%17
April 202695%21
May 202673%22
Departures on time
72%
Diverted
0%
Flights flown
264
Months covered
12

Same route, other flights

Keep nerding

Based on 268 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.