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Flight Reliability

UA 1315 · United Airlines

Denver → St. Louis (DEN–STL)83% of its flights flew this route. The rest (SFO–DEN, SYR–DEN) are included in these numbers.

90
Nerd Approved
WanderNerd Reliability Score
85%
Arrive within 15 minutes
1 min
Average arrival delay
0.3%
Cancelled
10 min early
Median arrival delay

Based on 346 historical flights. Data through May 2026.

What the data says

The 9 AM–12 PM departure wins.

UA 1315 departing between 9 AM–12 PM arrived on time 91% of the time, versus 68% between 6–9 AM.

Skip Monday if you can.

UA 1315 arrived on time 89% of the time on Thursdays. On Mondays: 78%.

A bit ahead of the DEN–STL route.

UA 1315 arrived on time 85% of the time, versus 79% across the DEN–STL route.

A bit ahead of the United Airlines network.

UA 1315 arrived on time 85% of the time, versus 79% across the United Airlines network.

The breakdown

On-time by weekday
  • Mon78%(49 flights)
  • Tue87%(37 flights)
  • Wed86%(55 flights)
  • Thu89%(54 flights)
  • Fri85%(54 flights)
  • Sat87%(39 flights)
  • Sun82%(56 flights)
On-time by departure window
  • 6–9 AM68%(40 flights)
  • 9 AM–12 PM91%(11 flights)
  • 12–3 PM86%(287 flights)
  • 3–6 PM—(6 flights)
On-time trend by month
91%
May

Jun 83% → May 91% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202583%30
July 202577%30
August 202594%31
September 202593%30
October 202597%31
November 202593%28
December 202565%31
January 202671%21
February 202694%17
March 202670%27
April 202683%23
May 202691%45
Departures on time
89%
Diverted
0.3%
Flights flown
344
Months covered
12

Same route, other flights

Keep nerding

Based on 346 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.