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Flight Reliability

UA 4808 · United Airlines

PIA → Chicago (PIA–ORD)80% of its flights flew this route. The rest (ORD–ICT, DEN–IDA) are included in these numbers.

18
Bring Snacks
WanderNerd Reliability Score
44%
Arrive within 15 minutes
44 min
Average arrival delay
4.2%
Cancelled
21 min
Median arrival delay

Based on 385 historical flights. Data through May 2026.

What the data says

The late departure is the smart one here.

UA 4808 departing between 9 PM–12 AM arrived on time 72% of the time, versus 42% between 3–6 PM.

Sunday scaries are real for this one.

UA 4808 arrived on time 55% of the time on Saturdays and just 26% on Sundays. That gap is worth planning around.

Well behind the PIA–ORD route.

UA 4808 arrived on time 44% of the time, versus 70% across the PIA–ORD route.

Well behind the United Airlines network.

UA 4808 arrived on time 44% of the time, versus 79% across the United Airlines network.

The breakdown

On-time by weekday
  • Mon54%(50 flights)
  • Tue44%(54 flights)
  • Wed39%(56 flights)
  • Thu41%(54 flights)
  • Fri52%(52 flights)
  • Sat55%(49 flights)
  • Sun26%(54 flights)
On-time by departure window
  • 6–9 AM—(7 flights)
  • 3–6 PM42%(337 flights)
  • 9 PM–12 AM72%(25 flights)
On-time trend by month
43%
May

Jun 57% → May 43% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202557%30
July 202537%30
August 202546%28
September 202538%29
October 202537%27
November 202542%26
December 202537%30
January 202631%29
February 202661%28
March 202636%28
April 202656%54
May 202643%30
Departures on time
63%
Diverted
0%
Flights flown
369
Months covered
12

Same route, other flights

Keep nerding

Based on 385 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.