UA329
UA329 (United Airlines) is a multi-stop service on 13 routes, busiest Buffalo to Chicago. Of 767 departures recorded from October 2024 to July 2026, 84.9% left on time, according to the US BTS.
- On-time departures84.9%of 767 flights
- Average delay16.0 min
- July 202631▲ 0.0%vs July 2025
- Cancelled1.0%
- Legs flown under this number13
Recorded departures by month
All legs under this number combined; see the leg table.
The most recent periods19 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 31 | 31 | 0.0% |
| February | 28 | 38 | ▲ 35.7% |
| March | 31 | 33 | ▲ 6.5% |
| April | 30 | 30 | 0.0% |
| May | 31 | 62 | ▲ 100.0% |
| June | 30 | 60 | ▲ 100.0% |
| July | 31 | 31 | 0.0% |
| August | 31 | – | – |
| September | 30 | – | – |
| October | 37 | – | in progress |
| November | 58 | – | – |
| December | 32 | – | – |
| Year to date (Jan–Jul) | 212 | 285 | ▲ 34.4% |
according to the US BTS · October 2024 → July 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 periods19 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 93.3% | 54.8% | ▼ 41.2% |
| February | 100.0% | 86.8% | ▼ 13.2% |
| March | 90.3% | 59.4% | ▼ 34.3% |
| April | 96.6% | 86.7% | ▼ 10.2% |
| May | 100.0% | 87.1% | ▼ 12.9% |
| June | 96.6% | 63.3% | ▼ 34.4% |
| July | 90.3% | 66.7% | ▼ 26.2% |
| August | 90.0% | – | – |
| September | 83.3% | – | – |
| October | 94.6% | – | in progress |
| November | 94.8% | – | – |
| December | 78.1% | – | – |
| Year-to-date average (Jan–Jul) | 95.3% | 72.1% | ▼ 24.3% |
according to the US BTS · October 2024 → July 2026
Average departure delay by month
according to the US BTS · October 2024 → July 2026
Cancelled departures by month
The most recent periods19 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 1 | 0 | ▼ 100.0% |
| February | 1 | 0 | ▼ 100.0% |
| March | 0 | 1 | – |
| April | 1 | 0 | ▼ 100.0% |
| May | 0 | 0 | – |
| June | 1 | 0 | ▼ 100.0% |
| July | 0 | 1 | – |
| August | 1 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 4 | 2 | ▼ 50.0% |
according to the US BTS · October 2024 → July 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% 759
- Cancelled 1.0% 8
Share of all recorded flights in the period, all legs. · Oct 12, 2024 → Jul 31, 2026
On time, leg by leg
Departures within 15 minutes of schedule; small figure = departures recorded.
Legs flown under this number
7| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| BUF ORD Buffalo Niagara International Airport – Chicago O'Hare International Airport | 760 | 4.7 min | 92.4% | 348 |
| BTV ORD Patrick Leahy Burlington International Airport – Chicago O'Hare International Airport | 1,225 | 46.4 min | 74.8% | 124 |
| ORD DEN Chicago O'Hare International Airport – Denver International Airport | 1,426 | 20.4 min | 80.0% | 80 |
| DJT ORD President Donald J. Trump International Airport – Chicago O'Hare International Airport | 1,844 | 29.2 min | 64.9% | 37 |
| BOI SFO Boise Air Terminal/Gowen Field – San Francisco International Airport | 840 | 10.5 min | 94.6% | 37 |
| SFO PIT San Francisco International Airport – Pittsburgh International Airport | 3,618 | -4.0 min | 97.2% | 36 |
| DEN PDX Denver International Airport – Portland International Airport | 1,592 | 5.4 min | 90.3% | 31 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 20 | 20 | 95.0% | 0 |
| November 2024 | 30 | 29 | 93.1% | 1 |
| December 2024 | 32 | 32 | 81.3% | 0 |
| January 2025 | 31 | 30 | 93.3% | 1 |
| February 2025 | 28 | 27 | 100.0% | 1 |
| March 2025 | 31 | 31 | 90.3% | 0 |
| April 2025 | 30 | 29 | 96.6% | 1 |
| May 2025 | 31 | 31 | 100.0% | 0 |
| June 2025 | 30 | 29 | 96.6% | 1 |
| July 2025 | 31 | 31 | 90.3% | 0 |
| August 2025 | 31 | 30 | 90.0% | 1 |
| September 2025 | 30 | 30 | 83.3% | 0 |
| October 2025 | 37 | 37 | 94.6% | 0 |
| November 2025 | 58 | 58 | 94.8% | 0 |
| December 2025 | 32 | 32 | 78.1% | 0 |
| January 2026 | 31 | 31 | 54.8% | 0 |
| February 2026 | 38 | 38 | 86.8% | 0 |
| March 2026 | 33 | 32 | 59.4% | 1 |
| April 2026 | 30 | 30 | 86.7% | 0 |
| May 2026 | 62 | 62 | 87.1% | 0 |
| June 2026 | 60 | 60 | 63.3% | 0 |
| July 2026 | 31 | 30 | 66.7% | 1 |