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Flight Reliability

UA 4522 · United Airlines

SCE → Chicago (SCE–ORD)91% of its flights flew this route. The rest (ORD–MSN, ORD–BUF) are included in these numbers.

77
Usually Fine
WanderNerd Reliability Score
83%
Arrive within 15 minutes
13 min
Average arrival delay
1.6%
Cancelled
11 min early
Median arrival delay

Based on 312 historical flights. Data through May 2026.

What the data says

Thursdays have been rough.

UA 4522 arrived on time 90% of the time on Mondays and just 68% on Thursdays. That gap is worth planning around.

Better than the SCE–ORD route average.

UA 4522 arrived on time 83% of the time, versus 73% across the SCE–ORD route.

A bit ahead of the United Airlines network.

UA 4522 arrived on time 83% of the time, versus 79% across the United Airlines network.

Slipping a little lately.

UA 4522 arrived on time 80% of the time over the last three months in the data, compared with 83% in the three months before that.

The breakdown

On-time by weekday
  • Mon90%(50 flights)
  • Tue82%(33 flights)
  • Wed88%(33 flights)
  • Thu68%(50 flights)
  • Fri78%(46 flights)
  • Sat88%(42 flights)
  • Sun86%(49 flights)
On-time by departure window
  • 6–9 AM83%(299 flights)
  • 3–6 PM—(4 flights)
On-time trend by month
88%
May

Jun 77% → May 88% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202577%22
July 202581%21
August 202583%23
September 202594%18
October 202587%31
November 202581%26
December 202579%28
January 202683%29
February 202689%27
March 202679%29
April 202672%25
May 202688%24
Departures on time
84%
Diverted
1.3%
Flights flown
303
Months covered
12

Same route, other flights

Keep nerding

Based on 312 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.