Flight Reliability
UA 4880 · United Airlines
Washington → Syracuse (IAD–SYR)99% of its flights flew this route. The rest (HSV–IAH) are included in these numbers.
- 86%
- Arrive within 15 minutes
- 2 min
- Average arrival delay
- 2.1%
- Cancelled
- 7 min early
- Median arrival delay
Based on 141 historical flights. Data through May 2026.
What the data says
Wednesdays have been rough.
UA 4880 arrived on time 100% of the time on Tuesdays and just 74% on Wednesdays. That gap is worth planning around.
Better than the IAD–SYR route average.
UA 4880 arrived on time 86% of the time, versus 78% across the IAD–SYR route.
A bit ahead of the United Airlines network.
UA 4880 arrived on time 86% of the time, versus 79% across the United Airlines network.
Ticking up lately.
UA 4880 arrived on time 86% of the time over the last three months in the data, compared with 80% in the three months before that.
The breakdown
- Mon85%(20 flights)
- Tue100%(18 flights)
- Wed74%(19 flights)
- Thu90%(19 flights)
- Fri83%(24 flights)
- Sat80%(25 flights)
- Sun92%(13 flights)
- 6–9 AM85%(136 flights)
- 6–9 PM—(2 flights)
Jun 62% → Apr 100% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 62% | 21 |
| July 2025 | 85% | 27 |
| August 2025 | 93% | 15 |
| January 2026 | 67% | 12 |
| March 2026 | 92% | 26 |
| April 2026 | 100% | 29 |
- Departures on time
- 89%
- Diverted
- 0%
- Flights flown
- 138
- Months covered
- 8
Same route, other flights
Keep nerding
Based on 141 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.