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Flight Reliability

UA 4433 · United Airlines

Newark → Washington (EWR–DCA)84% of its flights flew this route. The rest (ORD–ROA, BTV–EWR) are included in these numbers.

31
Bring Snacks
WanderNerd Reliability Score
60%
Arrive within 15 minutes
40 min
Average arrival delay
5.3%
Cancelled
5 min
Median arrival delay

Based on 358 historical flights. Data through May 2026.

What the data says

12–3 PM has a slight edge.

Departures between 12–3 PM arrived on time 59% of the time, against 55% between 6–9 PM.

Friday is doing you no favors.

UA 4433 arrived on time 73% of the time on Saturdays and just 51% on Fridays. That gap is worth planning around.

A bit behind the EWR–DCA route.

UA 4433 arrived on time 60% of the time, versus 64% across the EWR–DCA route.

Well behind the United Airlines network.

UA 4433 arrived on time 60% of the time, versus 79% across the United Airlines network.

The breakdown

On-time by weekday
  • Mon60%(48 flights)
  • Tue53%(47 flights)
  • Wed56%(50 flights)
  • Thu63%(49 flights)
  • Fri51%(51 flights)
  • Sat73%(45 flights)
  • Sun61%(49 flights)
On-time by departure window
  • 6–9 AM—(5 flights)
  • 9 AM–12 PM—(6 flights)
  • 12–3 PM59%(288 flights)
  • 6–9 PM55%(40 flights)
On-time trend by month
74%
May

Jun 63% → May 74% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202563%30
July 202561%23
August 202547%30
September 202583%30
October 202552%31
November 202524%21
December 202561%28
January 202669%29
February 202654%26
March 202653%30
April 202663%30
May 202674%31
Departures on time
66%
Diverted
0%
Flights flown
339
Months covered
12

Same route, other flights

Keep nerding

Based on 358 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.