Skip to content
WanderNerd
Check a flight

Flight Reliability

UA 5881 · United Airlines

IDA → Denver (IDA–DEN)84% of its flights flew this route. The rest (LNK–DEN, LAX–RDM) are included in these numbers.

98
Nerd Approved
WanderNerd Reliability Score
90%
Arrive within 15 minutes
6 min early
Average arrival delay
0%
Cancelled
20 min early
Median arrival delay

Based on 187 historical flights. Data through May 2026.

What the data says

Mornings have a slight edge.

Departures between 3–6 AM arrived on time 91% of the time, against 84% between 12–3 PM.

Saturdays have been rough.

UA 5881 arrived on time 97% of the time on Mondays and just 75% on Saturdays. That gap is worth planning around.

Better than the IDA–DEN route average.

UA 5881 arrived on time 90% of the time, versus 79% across the IDA–DEN route.

Better than the United Airlines network average.

UA 5881 arrived on time 90% of the time, versus 79% across the United Airlines network.

The breakdown

On-time by weekday
  • Mon97%(30 flights)
  • Tue88%(24 flights)
  • Wed96%(25 flights)
  • Thu96%(27 flights)
  • Fri89%(28 flights)
  • Sat75%(20 flights)
  • Sun85%(33 flights)
On-time by departure window
  • 3–6 AM91%(158 flights)
  • 12–3 PM84%(25 flights)
  • 3–6 PM—(3 flights)
  • 9 PM–12 AM—(1 flights)
On-time trend by month
71%
Dec

Jun 87% → Dec 71% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202587%30
July 202587%30
August 202597%31
September 202586%28
October 202596%25
November 202595%20
December 202571%14
Departures on time
90%
Diverted
0%
Flights flown
187
Months covered
10

Same route, other flights

Keep nerding

Based on 187 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.