Flight Reliability
UA 4359 · United Airlines
SCE → Washington (SCE–IAD)99% of its flights flew this route. The rest (IAH–TUL, ROC–IAD) are included in these numbers.
92
Nerd Approved
WanderNerd Reliability Score
- 89%
- Arrive within 15 minutes
- 9 min
- Average arrival delay
- 1.2%
- Cancelled
- 13 min early
- Median arrival delay
Based on 245 historical flights. Data through May 2026.
What the data says
Saturdays have been rough.
UA 4359 arrived on time 97% of the time on Wednesdays and just 77% on Saturdays. That gap is worth planning around.
Better than the United Airlines network average.
UA 4359 arrived on time 89% of the time, versus 79% across the United Airlines network.
The breakdown
- Mon82%(34 flights)
- Tue91%(33 flights)
- Wed97%(33 flights)
- Thu89%(35 flights)
- Fri95%(37 flights)
- Sat77%(35 flights)
- Sun91%(35 flights)
- 6–9 AM89%(241 flights)
- 12–3 PM—(1 flights)
90%
May
Jun 76% → May 90% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 76% | 21 |
| July 2025 | 87% | 30 |
| August 2025 | 97% | 31 |
| September 2025 | 93% | 30 |
| October 2025 | 93% | 29 |
| November 2025 | 80% | 20 |
| December 2025 | 77% | 13 |
| April 2026 | 97% | 30 |
| May 2026 | 90% | 30 |
- Departures on time
- 91%
- Diverted
- 0%
- Flights flown
- 242
- Months covered
- 12
Same route, other flights
Keep nerding
Based on 245 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.