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Flight Reliability

UA 4172 · United Airlines

Newark → Washington (EWR–DCA)90% of its flights flew this route. The rest (BUF–IAD, SYR–IAD) are included in these numbers.

68
Usually Fine
WanderNerd Reliability Score
76%
Arrive within 15 minutes
14 min
Average arrival delay
3.0%
Cancelled
11 min early
Median arrival delay

Based on 365 historical flights. Data through May 2026.

What the data says

The late departure is the smart one here.

UA 4172 departing between 6–9 PM arrived on time 94% of the time, versus 74% between 9 AM–12 PM.

Friday is doing you no favors.

UA 4172 arrived on time 83% of the time on Saturdays. On Fridays: 69%.

Better than the EWR–DCA route average.

UA 4172 arrived on time 76% of the time, versus 64% across the EWR–DCA route.

A bit behind the United Airlines network.

UA 4172 arrived on time 76% of the time, versus 79% across the United Airlines network.

The breakdown

On-time by weekday
  • Mon79%(48 flights)
  • Tue75%(51 flights)
  • Wed75%(52 flights)
  • Thu71%(52 flights)
  • Fri69%(52 flights)
  • Sat83%(48 flights)
  • Sun78%(50 flights)
On-time by departure window
  • 6–9 AM—(3 flights)
  • 9 AM–12 PM74%(318 flights)
  • 12–3 PM—(1 flights)
  • 6–9 PM94%(31 flights)
On-time trend by month
71%
May

Jun 87% → May 71% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202587%30
July 202573%30
August 202584%31
September 202587%30
October 202577%31
November 202567%27
December 202571%28
January 202672%29
February 202646%26
March 202677%30
April 202690%30
May 202671%31
Departures on time
78%
Diverted
0.3%
Flights flown
353
Months covered
12

Same route, other flights

Keep nerding

Based on 365 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.