Flight Reliability
UA 4910 · United Airlines
Washington → Dayton (IAD–DAY)90% of its flights flew this route. The rest (GPT–IAH, IAD–RIC) are included in these numbers.
85
Pretty Reliable
WanderNerd Reliability Score
- 85%
- Arrive within 15 minutes
- 10 min
- Average arrival delay
- 1.2%
- Cancelled
- 9 min early
- Median arrival delay
Based on 164 historical flights. Data through May 2026.
What the data says
Saturdays have been rough.
UA 4910 arrived on time 96% of the time on Thursdays and just 71% on Saturdays. That gap is worth planning around.
A bit ahead of the United Airlines network.
UA 4910 arrived on time 85% of the time, versus 79% across the United Airlines network.
The breakdown
- Mon83%(23 flights)
- Tue90%(20 flights)
- Wed86%(21 flights)
- Thu96%(22 flights)
- Fri91%(23 flights)
- Sat71%(28 flights)
- Sun79%(24 flights)
- 6–9 AM—(8 flights)
- 9 AM–12 PM—(9 flights)
- 12–3 PM88%(144 flights)
83%
Oct
Jun 86% → Oct 83% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 86% | 29 |
| July 2025 | 80% | 30 |
| August 2025 | 97% | 31 |
| September 2025 | 93% | 30 |
| October 2025 | 83% | 24 |
- Departures on time
- 84%
- Diverted
- 0.6%
- Flights flown
- 161
- Months covered
- 7
Same route, other flights
Keep nerding
Based on 164 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.