Flight Reliability
UA 1817 · United Airlines
Washington → Denver (IAD–DEN)
100
Nerd Approved
WanderNerd Reliability Score
- 92%
- Arrive within 15 minutes
- 7 min early
- Average arrival delay
- 0%
- Cancelled
- 13 min early
- Median arrival delay
Based on 37 historical flights. Data through May 2026.
What the data says
Better than the IAD–DEN route average.
UA 1817 arrived on time 92% of the time, versus 82% across the IAD–DEN route.
Better than the United Airlines network average.
UA 1817 arrived on time 92% of the time, versus 79% across the United Airlines network.
The breakdown
- Mon—(5 flights)
- Tue—(6 flights)
- Wed—(6 flights)
- Thu—(5 flights)
- Fri—(5 flights)
- Sat—(5 flights)
- Sun—(5 flights)
- Departures on time
- 92%
- Diverted
- 0%
- Flights flown
- 37
- Months covered
- 2
Same route, other flights
Keep nerding
Based on 37 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.