Skip to content
WanderNerd
Check a flight

Flight Reliability

UA 4501 · United Airlines

Chicago → AVP (ORD–AVP)83% of its flights flew this route. The rest (TYS–ORD, IAD–CVG) are included in these numbers.

55
A Little Dicey
WanderNerd Reliability Score
68%
Arrive within 15 minutes
27 min
Average arrival delay
2.7%
Cancelled
4 min early
Median arrival delay

Based on 365 historical flights. Data through May 2026.

What the data says

The 3–6 PM departure wins.

UA 4501 departing between 3–6 PM arrived on time 77% of the time, versus 67% between 12–3 PM.

Friday is doing you no favors.

UA 4501 arrived on time 80% of the time on Saturdays and just 58% on Fridays. That gap is worth planning around.

Lagging the United Airlines network.

UA 4501 arrived on time 68% of the time, versus 79% across the United Airlines network.

Trending in the right direction.

UA 4501 arrived on time 72% of the time over the last three months in the data, compared with 60% in the three months before that.

The breakdown

On-time by weekday
  • Mon67%(51 flights)
  • Tue67%(51 flights)
  • Wed62%(52 flights)
  • Thu76%(49 flights)
  • Fri58%(50 flights)
  • Sat80%(50 flights)
  • Sun68%(50 flights)
On-time by departure window
  • 12–3 PM67%(331 flights)
  • 3–6 PM77%(22 flights)
On-time trend by month
74%
May

Jun 73% → May 74% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202573%30
July 202552%31
August 202587%30
September 202567%30
October 202577%31
November 202563%27
December 202545%31
January 202669%29
February 202667%27
March 202669%29
April 202674%27
May 202674%31
Departures on time
69%
Diverted
0.5%
Flights flown
353
Months covered
12

Same route, other flights

Keep nerding

Based on 365 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.