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Flight Reliability

UA 3679 · United Airlines

Pittsburgh → Washington (PIT–IAD)

100
Nerd Approved
WanderNerd Reliability Score
98%
Arrive within 15 minutes
11 min early
Average arrival delay
0.8%
Cancelled
15 min early
Median arrival delay

Based on 359 historical flights. Data through May 2026.

What the data says

Thursday comes out ahead.

A small edge: 100% on time on Thursdays against 94% on Tuesdays.

Better than the PIT–IAD route average.

UA 3679 arrived on time 98% of the time, versus 88% across the PIT–IAD route.

Well ahead of the United Airlines network.

UA 3679 arrived on time 98% of the time, versus 79% across the United Airlines network.

Ticking up lately.

UA 3679 arrived on time 98% of the time over the last three months in the data, compared with 93% in the three months before that.

The breakdown

On-time by weekday
  • Mon96%(50 flights)
  • Tue94%(50 flights)
  • Wed98%(51 flights)
  • Thu100%(51 flights)
  • Fri98%(52 flights)
  • Sat100%(52 flights)
  • Sun98%(50 flights)
On-time trend by month
97%
May

Jun 100% → May 97% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 2025100%29
July 2025100%30
August 2025100%31
September 2025100%30
October 2025100%31
November 2025100%29
December 202584%31
January 2026100%28
February 202696%27
March 2026100%30
April 202697%30
May 202697%30
Departures on time
98%
Diverted
0%
Flights flown
356
Months covered
12

Same route, other flights

Keep nerding

Based on 359 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.