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Flight Reliability

UA 5018 · United Airlines

Denver → RIW (DEN–RIW)86% of its flights flew this route. The rest (SHR–DEN, LBL–DEN) are included in these numbers.

77
Usually Fine
WanderNerd Reliability Score
78%
Arrive within 15 minutes
16 min
Average arrival delay
0.9%
Cancelled
7 min early
Median arrival delay

Based on 423 historical flights. Data through May 2026.

What the data says

The late departure is the smart one here.

UA 5018 departing between 6–9 PM arrived on time 91% of the time, versus 75% between 3–6 PM.

Friday is doing you no favors.

UA 5018 arrived on time 90% of the time on Saturdays and just 61% on Fridays. That gap is worth planning around.

A bit behind the DEN–RIW route.

UA 5018 arrived on time 78% of the time, versus 82% across the DEN–RIW route.

The breakdown

On-time by weekday
  • Mon82%(62 flights)
  • Tue82%(54 flights)
  • Wed78%(60 flights)
  • Thu77%(60 flights)
  • Fri61%(61 flights)
  • Sat90%(57 flights)
  • Sun81%(62 flights)
On-time by departure window
  • 6–9 AM—(1 flights)
  • 3–6 PM75%(40 flights)
  • 6–9 PM91%(58 flights)
  • 9 PM–12 AM76%(317 flights)
On-time trend by month
76%
May

Jun 57% → May 76% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202557%30
July 202560%30
August 202553%30
September 202583%30
October 202587%31
November 202593%30
December 202588%43
January 202678%36
February 202686%28
March 202697%30
April 202680%45
May 202676%53
Departures on time
81%
Diverted
0.7%
Flights flown
416
Months covered
12

Same route, other flights

Keep nerding

Based on 423 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.