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Flight Reliability

UA 4766 · United Airlines

Chicago → Oklahoma City (ORD–OKC)93% of its flights flew this route. The rest (PIT–ORD, MSP–ORD) are included in these numbers.

63
A Little Dicey
WanderNerd Reliability Score
70%
Arrive within 15 minutes
21 min
Average arrival delay
2.5%
Cancelled
1 min early
Median arrival delay

Based on 360 historical flights. Data through May 2026.

What the data says

Morning flights do better here.

UA 4766 departing between 9 AM–12 PM arrived on time 81% of the time, versus 69% between 3–6 PM.

Monday is the weak spot.

UA 4766 arrived on time 77% of the time on Thursdays. On Mondays: 65%.

Lagging the United Airlines network.

UA 4766 arrived on time 70% of the time, versus 79% across the United Airlines network.

Recent months have been rougher.

UA 4766 arrived on time 68% of the time over the last three months in the data, compared with 78% in the three months before that.

The breakdown

On-time by weekday
  • Mon65%(49 flights)
  • Tue67%(52 flights)
  • Wed71%(52 flights)
  • Thu77%(51 flights)
  • Fri67%(51 flights)
  • Sat72%(46 flights)
  • Sun72%(50 flights)
On-time by departure window
  • 6–9 AM—(3 flights)
  • 9 AM–12 PM81%(16 flights)
  • 12–3 PM—(5 flights)
  • 3–6 PM69%(327 flights)
On-time trend by month
77%
May

Jun 40% → May 77% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202540%30
July 202561%31
August 202572%29
September 202590%30
October 202571%31
November 202570%23
December 202580%30
January 202669%29
February 202686%28
March 202660%30
April 202667%30
May 202677%30
Departures on time
73%
Diverted
0%
Flights flown
351
Months covered
12

Same route, other flights

Keep nerding

Based on 360 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.