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Flight Reliability

UA 4818 · United Airlines

Washington → CAE (IAD–CAE)87% of its flights flew this route. The rest (IAH–LBB, IAH–HSV) are included in these numbers.

77
Usually Fine
WanderNerd Reliability Score
76%
Arrive within 15 minutes
9 min
Average arrival delay
0.4%
Cancelled
7 min early
Median arrival delay

Based on 237 historical flights. Data through May 2026.

What the data says

The 9 AM–12 PM departure wins.

UA 4818 departing between 9 AM–12 PM arrived on time 86% of the time, versus 74% between 6–9 AM.

Monday is the weak spot.

UA 4818 arrived on time 82% of the time on Thursdays. On Mondays: 68%.

A bit behind the United Airlines network.

UA 4818 arrived on time 76% of the time, versus 79% across the United Airlines network.

The breakdown

On-time by weekday
  • Mon68%(38 flights)
  • Tue79%(33 flights)
  • Wed77%(26 flights)
  • Thu82%(22 flights)
  • Fri81%(37 flights)
  • Sat74%(38 flights)
  • Sun72%(39 flights)
On-time by departure window
  • 6–9 AM74%(202 flights)
  • 9 AM–12 PM86%(29 flights)
  • 12–3 PM—(2 flights)
On-time trend by month
93%
May

Jun 56% → May 93% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202556%25
July 202562%21
August 202563%27
September 202574%23
October 202590%30
November 202583%29
December 202564%14
April 202687%30
May 202693%28
Departures on time
82%
Diverted
1.3%
Flights flown
233
Months covered
11

Same route, other flights

Keep nerding

Based on 237 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.