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Flight Reliability

UA 4500 · United Airlines

Newark → Washington (EWR–DCA)92% of its flights flew this route. The rest (ORD–HSV, ORD–SDF) are included in these numbers.

59
A Little Dicey
WanderNerd Reliability Score
70%
Arrive within 15 minutes
16 min
Average arrival delay
3.8%
Cancelled
2 min
Median arrival delay

Based on 346 historical flights. Data through May 2026.

What the data says

Thursdays have been rough.

UA 4500 arrived on time 84% of the time on Sundays and just 56% on Thursdays. That gap is worth planning around.

A bit ahead of the EWR–DCA route.

UA 4500 arrived on time 70% of the time, versus 64% across the EWR–DCA route.

Lagging the United Airlines network.

UA 4500 arrived on time 70% of the time, versus 79% across the United Airlines network.

Keep a backup plan handy.

UA 4500 was cancelled 3.8% of the time. Typical for U.S. flights is around 1–2%.

The breakdown

On-time by weekday
  • Mon72%(47 flights)
  • Tue70%(46 flights)
  • Wed70%(46 flights)
  • Thu56%(48 flights)
  • Fri69%(49 flights)
  • Sat69%(45 flights)
  • Sun84%(51 flights)
On-time by departure window
  • 6–9 AM70%(306 flights)
  • 12–3 PM—(8 flights)
  • 3–6 PM—(4 flights)
  • 6–9 PM71%(14 flights)
On-time trend by month
77%
May

Jun 92% → May 77% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202592%13
July 202579%29
August 202581%31
September 202577%30
October 202565%31
November 202550%24
December 202570%30
January 202676%29
February 202656%25
March 202653%30
April 202673%30
May 202677%30
Departures on time
85%
Diverted
0.3%
Flights flown
332
Months covered
12

Same route, other flights

Keep nerding

Based on 346 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.