Flight Reliability
UA 4849 · United Airlines
Washington → GSO (IAD–GSO)86% of its flights flew this route. The rest (OKC–IAH, IAD–BDL) are included in these numbers.
86
Pretty Reliable
WanderNerd Reliability Score
- 81%
- Arrive within 15 minutes
- 5 min
- Average arrival delay
- 0.8%
- Cancelled
- 9 min early
- Median arrival delay
Based on 118 historical flights. Data through May 2026.
What the data says
Saturdays have been rough.
UA 4849 arrived on time 93% of the time on Tuesdays and just 73% on Saturdays. That gap is worth planning around.
The breakdown
- Mon86%(14 flights)
- Tue93%(14 flights)
- Wed86%(14 flights)
- Thu80%(15 flights)
- Fri74%(23 flights)
- Sat73%(22 flights)
- Sun87%(15 flights)
- 9 AM–12 PM—(9 flights)
- 12–3 PM—(2 flights)
- 3–6 PM—(2 flights)
- 6–9 PM—(4 flights)
- 9 PM–12 AM81%(100 flights)
73%
May
Jun 60% → May 73% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 60% | 10 |
| July 2025 | 76% | 29 |
| August 2025 | 84% | 31 |
| September 2025 | 96% | 24 |
| May 2026 | 73% | 11 |
- Departures on time
- 82%
- Diverted
- 0%
- Flights flown
- 117
- Months covered
- 9
Same route, other flights
Keep nerding
Based on 118 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.