UA277
UA277 (United Airlines) is a multi-stop service on 13 routes, busiest Ontario to San Francisco. Of 1,131 departures recorded from October 2024 to July 2026, 88.1% left on time, according to the US BTS.
- On-time departures88.1%of 1,131 flights
- Average delay6.7 min
- July 202661▲ 5.2%vs July 2025
- Cancelled0.8%
- Legs flown under this number13
according to the US BTS · Oct 12, 2024 → Jul 31, 2026 domestic flights only
Recorded departures by month
Partial coverage: domestic flights only · 22 of 22 periods have data
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 | 55 | 31 | ▼ 43.6% |
| February | 56 | 28 | ▼ 50.0% |
| March | 62 | 54 | ▼ 12.9% |
| April | 60 | 56 | ▼ 6.7% |
| May | 62 | 62 | 0.0% |
| June | 57 | 59 | ▲ 3.5% |
| July | 58 | 61 | ▲ 5.2% |
| August | 46 | – | – |
| September | 30 | – | – |
| October | 37 | – | in progress |
| November | 60 | – | – |
| December | 64 | – | – |
| Year to date (Jan–Jul) | 410 | 351 | ▼ 14.4% |
according to the US BTS · October 2024 → July 2026
On-time departures by month
Partial coverage: domestic flights only · 22 of 22 periods have data
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 | 88.9% | 100.0% | ▲ 12.5% |
| February | 85.7% | 75.0% | ▼ 12.5% |
| March | 93.6% | 77.4% | ▼ 17.3% |
| April | 88.3% | 94.6% | ▲ 7.1% |
| May | 90.3% | 88.7% | ▼ 1.8% |
| June | 94.7% | 78.0% | ▼ 17.7% |
| July | 87.9% | 78.7% | ▼ 10.5% |
| August | 88.9% | – | – |
| September | 90.0% | – | – |
| October | 75.0% | – | in progress |
| November | 93.1% | – | – |
| December | 92.2% | – | – |
| Year-to-date average (Jan–Jul) | 89.9% | 84.6% | ▼ 5.9% |
according to the US BTS · October 2024 → July 2026
Average departure delay by month
Partial coverage: domestic flights only · 22 of 22 periods have data
according to the US BTS · October 2024 → July 2026
Cancelled departures by month
Partial coverage: domestic flights only · 22 of 22 periods have data
The most recent periods19 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 1 | 0 | ▼ 100.0% |
| February | 0 | 0 | – |
| March | 0 | 1 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 0 | 0 | – |
| August | 1 | – | – |
| September | 0 | – | – |
| October | 1 | – | in progress |
| November | 2 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 1 | 1 | 0.0% |
according to the US BTS · October 2024 → July 2026
This is not a forecast
This is a historical record of departures already flown, not a forecast for your flight.
This number flies several legs
Several legs: the headline figure averages all of them. See the leg table.
Cancellation share
- Not cancelled 99.2% 1,122
- Cancelled 0.8% 9
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
99 of 9
| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| ONT SFO Ontario International Airport – San Francisco International Airport | 585 | 1.7 min | 93.8% | 307 |
| IAH FLL George Bush Intercontinental Airport – Fort Lauderdale Hollywood International Airport | 1,552 | 8.6 min | 81.3% | 269 |
| LAX IAH Los Angeles International Airport – George Bush Intercontinental Airport | 2,215 | 7.2 min | 90.6% | 149 |
| SFO IAH San Francisco International Airport – George Bush Intercontinental Airport | 2,627 | 14.6 min | 84.6% | 109 |
| SFO PDX San Francisco International Airport – Portland International Airport | 886 | 3.3 min | 92.3% | 79 |
| SFO DEN San Francisco International Airport – Denver International Airport | 1,553 | 19.3 min | 82.2% | 45 |
| SFO RNO San Francisco International Airport – Reno Tahoe International Airport | 308 | -2.2 min | 91.9% | 37 |
| SFO AUS San Francisco International Airport – Austin Bergstrom International Airport | 2,417 | 1.3 min | 87.5% | 32 |
| ORD AUS Chicago O'Hare International Airport – Austin Bergstrom International Airport | 1,574 | 3.4 min | 87.1% | 31 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 40 | 39 | 89.7% | 1 |
| November 2024 | 60 | 59 | 93.2% | 1 |
| December 2024 | 33 | 32 | 87.5% | 1 |
| January 2025 | 55 | 54 | 88.9% | 1 |
| February 2025 | 56 | 56 | 85.7% | 0 |
| March 2025 | 62 | 62 | 93.6% | 0 |
| April 2025 | 60 | 60 | 88.3% | 0 |
| May 2025 | 62 | 62 | 90.3% | 0 |
| June 2025 | 57 | 57 | 94.7% | 0 |
| July 2025 | 58 | 58 | 87.9% | 0 |
| August 2025 | 46 | 45 | 88.9% | 1 |
| September 2025 | 30 | 30 | 90.0% | 0 |
| October 2025 | 37 | 36 | 75.0% | 1 |
| November 2025 | 60 | 58 | 93.1% | 2 |
| December 2025 | 64 | 64 | 92.2% | 0 |
| January 2026 | 31 | 31 | 100.0% | 0 |
| February 2026 | 28 | 28 | 75.0% | 0 |
| March 2026 | 54 | 53 | 77.4% | 1 |
| April 2026 | 56 | 56 | 94.6% | 0 |
| May 2026 | 62 | 62 | 88.7% | 0 |
| June 2026 | 59 | 59 | 78.0% | 0 |
| July 2026 | 61 | 61 | 78.7% | 0 |