Flight profile · United Airlines
UA1335
Chicago (ORD) to Buffalo (BUF) · scheduled 6:20 PM – 9:01 PM
How UA1335 performs
492 operations, 2024-08-19 to 2026-06-30.
UA1335 arrived on time 69.0% of the time, against 74.8% for all ORD → BUF flights — this specific departure is 5.8 percentage points worse than the route as a whole. Against United Airlines’s own flights on this route it is 5.7 points worse.
Source: US DOT Bureau of Transportation Statistics · 492 operations between 2024-08-19 to 2026-06-30
Against the rest of the route
| On time | Cancelled | Median delay | Severe | Flights | |
|---|---|---|---|---|---|
| UA1335 | 69.0% | 0.81% | -1 min | 12.1% | 492 |
| United Airlines on ORD → BUF | 74.7% | 1.11% | -3 min | 9.2% | 1,896 |
| All ORD → BUF flights | 74.8% | 1.77% | -3 min | 9.2% | 5,986 |
Source: FlyerIntel analysis of US DOT BTS data · 2024-08-19 to 2026-06-30
Other routes UA1335 has flown
A flight number is a slot in a schedule, and carriers reassign it. These are the other city pairs this number served in the analysis period.
| Route | Operated | Flights | On time |
|---|---|---|---|
| PBI→ORD West Palm Beach to Chicago | 2026-05-21 – 2026-06-24 | 35 | — |
| LAS→ORD Las Vegas to Chicago | 2026-03-05 – 2026-05-20 | 74 | — |
| MCI→ORD Kansas City to Chicago | 2026-01-06 – 2026-02-11 | 37 | — |
| PBI→EWR West Palm Beach to Newark | 2025-12-02 – 2025-12-17 | 14 | — |
| DSM→ORD Des Moines to Chicago | 2025-10-27 – 2025-12-01 | 20 | — |
| BWI→ORD Baltimore to Chicago | 2025-11-29 – 2025-11-30 | 2 | — |
| DFW→ORD Dallas–Fort Worth to Chicago | 2025-05-22 – 2025-10-25 | 118 | 74.1% |
| ORD→CLT Chicago to Charlotte | 2025-10-01 – 2025-10-25 | 25 | — |
| PDX→ORD Portland to Chicago | 2024-10-27 – 2025-03-29 | 154 | 92.9% |
| ORD→LGA Chicago to New York | 2025-01-07 – 2025-02-12 | 37 | — |
| SFO→PDX San Francisco to Portland | 2024-10-27 – 2025-01-06 | 72 | — |
| FCA→ORD Kalispell to Chicago | 2024-05-23 – 2024-08-18 | 88 | — |
| ORD→MCO Chicago to Orlando | 2024-06-27 – 2024-08-18 | 53 | — |
| IAD→LAS Washington to Las Vegas | 2024-03-07 – 2024-05-22 | 77 | — |
| ORD→FSD Chicago to Sioux Falls | 2024-01-09 – 2024-03-06 | 58 | — |
| DEN→ONT Denver to Ontario | 2023-07-01 – 2024-01-08 | 191 | 71.4% |
Because the same number has served different journeys, the statistics above describe only the route UA1335 currently operates. Blending them would produce an average of two different flights.
Data and methodology
Calculated by FlyerIntel from 492 records of UA1335 operating ORD → BUF, published by the US DOT Bureau of Transportation Statistics. A flight counts as delayed when it arrives 15 or more minutes after schedule. Cancelled and diverted flights are excluded from the on-time rate and reported separately. Flight numbers are resolved as carrier plus number plus route, because the same number serves different routes over time.