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Flight Reliability

UA 798 · United Airlines

Denver → Washington (DEN–IAD)93% of its flights flew this route. The rest (EWR–ORD, CLT–EWR) are included in these numbers.

88
Pretty Reliable
WanderNerd Reliability Score
81%
Arrive within 15 minutes
9 min
Average arrival delay
0.3%
Cancelled
6 min early
Median arrival delay

Based on 364 historical flights. Data through May 2026.

What the data says

Morning-you made the right choice.

UA 798 departing between 6–9 AM arrived on time 100% of the time, versus 80% between 3–6 PM.

Skip Thursday if you can.

UA 798 arrived on time 85% of the time on Mondays. On Thursdays: 75%.

It basically never cancels.

Out of 364 scheduled flights, only 0.3% were cancelled.

The breakdown

On-time by weekday
  • Mon85%(52 flights)
  • Tue81%(52 flights)
  • Wed77%(52 flights)
  • Thu75%(51 flights)
  • Fri83%(52 flights)
  • Sat83%(52 flights)
  • Sun83%(52 flights)
On-time by departure window
  • 6–9 AM100%(11 flights)
  • 3–6 PM80%(352 flights)
On-time trend by month
81%
May

Jun 57% → May 81% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202557%30
July 202565%31
August 202565%31
September 202590%30
October 202597%31
November 202586%29
December 202568%31
January 2026100%30
February 202686%28
March 202681%31
April 202697%30
May 202681%31
Departures on time
79%
Diverted
0%
Flights flown
363
Months covered
12

Same route, other flights

Keep nerding

Based on 364 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.