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Flight Reliability

UA 4780 · United Airlines

Chicago → CAK (ORD–CAK)97% of its flights flew this route. The rest (PIA–ORD, FAT–SFO) are included in these numbers.

64
A Little Dicey
WanderNerd Reliability Score
76%
Arrive within 15 minutes
16 min
Average arrival delay
3.5%
Cancelled
4 min early
Median arrival delay

Based on 373 historical flights. Data through May 2026.

What the data says

The 6–9 AM departure wins.

UA 4780 departing between 6–9 AM arrived on time 92% of the time, versus 75% between 9 AM–12 PM.

Friday is doing you no favors.

UA 4780 arrived on time 84% of the time on Wednesdays and just 56% on Fridays. That gap is worth planning around.

Better than the ORD–CAK route average.

UA 4780 arrived on time 76% of the time, versus 64% across the ORD–CAK route.

A bit behind the United Airlines network.

UA 4780 arrived on time 76% of the time, versus 79% across the United Airlines network.

The breakdown

On-time by weekday
  • Mon69%(51 flights)
  • Tue83%(53 flights)
  • Wed84%(51 flights)
  • Thu84%(49 flights)
  • Fri56%(50 flights)
  • Sat74%(50 flights)
  • Sun81%(53 flights)
On-time by departure window
  • 6–9 AM92%(12 flights)
  • 9 AM–12 PM75%(344 flights)
  • 12–3 PM—(1 flights)
On-time trend by month
76%
May

Jun 77% → May 76% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202577%30
July 202563%30
August 202581%31
September 202590%30
October 202590%31
November 202589%26
December 202565%26
January 202670%30
February 202668%28
March 202677%26
April 202663%27
May 202676%42
Departures on time
78%
Diverted
0.8%
Flights flown
357
Months covered
12

Same route, other flights

Keep nerding

Based on 373 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.