UA1335
UA1335 (United Airlines) is a multi-stop service on 12 routes, busiest Chicago to Buffalo. Of 1,026 departures recorded from October 2024 to June 2026, 81.6% left on time, according to the US BTS.
- On-time departures81.6%of 1,026 flights
- Average delay13.8 min
- June 202654▼ 8.5%vs June 2025
- Cancelled1.0%
- Legs flown under this number12
Recorded departures by month
All legs under this number combined; see the leg table.
The most recent periods18 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 68 | 31 | ▼ 54.4% |
| February | 56 | 28 | ▼ 50.0% |
| March | 60 | 55 | ▼ 8.3% |
| April | 30 | 59 | ▲ 96.7% |
| May | 39 | 42 | ▲ 7.7% |
| June | 59 | 54 | ▼ 8.5% |
| July | 57 | – | – |
| August | 46 | – | – |
| September | 30 | – | – |
| October | 54 | – | in progress |
| November | 17 | – | – |
| December | 29 | – | – |
| Year to date (Jan–Jun) | 312 | 269 | ▼ 13.8% |
according to the US BTS · October 2024 → June 2026
On-time departures by month
On time = departure within 15 minutes of schedule. Non-cancelled flights with a recorded delay only.
The most recent periods18 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 86.6% | 80.7% | ▼ 6.8% |
| February | 78.6% | 78.6% | 0.0% |
| March | 85.0% | 67.9% | ▼ 20.1% |
| April | 96.6% | 84.2% | ▼ 12.8% |
| May | 74.4% | 90.5% | ▲ 21.7% |
| June | 66.1% | 77.4% | ▲ 17.0% |
| July | 66.7% | – | – |
| August | 64.4% | – | – |
| September | 96.7% | – | – |
| October | 85.2% | – | in progress |
| November | 75.0% | – | – |
| December | 58.6% | – | – |
| Year-to-date average (Jan–Jun) | 81.2% | 79.9% | ▼ 1.6% |
according to the US BTS · October 2024 → June 2026
Average departure delay by month
according to the US BTS · October 2024 → June 2026
Cancelled departures by month
The most recent periods18 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 1 | 0 | ▼ 100.0% |
| February | 0 | 0 | – |
| March | 0 | 2 | – |
| April | 1 | 2 | ▲ 100.0% |
| May | 0 | 0 | – |
| June | 0 | 1 | – |
| July | 0 | – | – |
| August | 1 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 1 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jun) | 2 | 5 | ▲ 150.0% |
according to the US BTS · October 2024 → June 2026
This is a historical record of departures already flown, not a forecast for your flight.
Several legs: the headline figure averages all of them. See the leg table.
Cancellation share
- Not cancelled 99.0% 1,016
- Cancelled 1.0% 10
Share of all recorded flights in the period, all legs. · Oct 12, 2024 → Jun 30, 2026
On time, leg by leg
Departures within 15 minutes of schedule; small figure = departures recorded.
Legs flown under this number
8| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| ORD BUF Chicago O'Hare International Airport – Buffalo Niagara International Airport | 760 | 21.3 min | 76.3% | 438 |
| PDX ORD Portland International Airport – Chicago O'Hare International Airport | 2,792 | 0.3 min | 92.2% | 154 |
| DFW ORD Dallas Fort Worth International Airport – Chicago O'Hare International Airport | 1,291 | 16.9 min | 76.1% | 118 |
| LAS ORD Harry Reid International Airport – Chicago O'Hare International Airport | 2,432 | 7.1 min | 91.7% | 74 |
| SFO PDX San Francisco International Airport – Portland International Airport | 886 | 2.9 min | 91.4% | 72 |
| ORD LGA Chicago O'Hare International Airport – LaGuardia Airport | 1,177 | 11.1 min | 83.8% | 37 |
| MCI ORD Kansas City International Airport – Chicago O'Hare International Airport | 647 | 12.5 min | 81.1% | 37 |
| DJT ORD President Donald J. Trump International Airport – Chicago O'Hare International Airport | 1,844 | 6.3 min | 85.7% | 35 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 30 | 30 | 93.3% | 0 |
| November 2024 | 89 | 88 | 94.3% | 1 |
| December 2024 | 93 | 93 | 94.6% | 0 |
| January 2025 | 68 | 67 | 86.6% | 1 |
| February 2025 | 56 | 56 | 78.6% | 0 |
| March 2025 | 60 | 60 | 85.0% | 0 |
| April 2025 | 30 | 29 | 96.6% | 1 |
| May 2025 | 39 | 39 | 74.4% | 0 |
| June 2025 | 59 | 59 | 66.1% | 0 |
| July 2025 | 57 | 57 | 66.7% | 0 |
| August 2025 | 46 | 45 | 64.4% | 1 |
| September 2025 | 30 | 30 | 96.7% | 0 |
| October 2025 | 54 | 54 | 85.2% | 0 |
| November 2025 | 17 | 16 | 75.0% | 1 |
| December 2025 | 29 | 29 | 58.6% | 0 |
| January 2026 | 31 | 31 | 80.7% | 0 |
| February 2026 | 28 | 28 | 78.6% | 0 |
| March 2026 | 55 | 53 | 67.9% | 2 |
| April 2026 | 59 | 57 | 84.2% | 2 |
| May 2026 | 42 | 42 | 90.5% | 0 |
| June 2026 | 54 | 53 | 77.4% | 1 |