UA1871
UA1871 (United Airlines) is a multi-stop service on 10 routes, busiest San Diego to San Francisco. Of 855 departures recorded from October 2024 to July 2026, 80.2% left on time, according to the US BTS.
- On-time departures80.2%of 855 flights
- Average delay13.5 min
- July 202627▼ 52.6%vs July 2025
- Cancelled0.6%
- Legs flown under this number10
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 | 29 | 31 | ▲ 6.9% |
| February | 28 | 25 | ▼ 10.7% |
| March | 31 | 29 | ▼ 6.5% |
| April | 26 | 26 | 0.0% |
| May | 40 | 29 | ▼ 27.5% |
| June | 59 | 27 | ▼ 54.2% |
| July | 57 | 27 | ▼ 52.6% |
| August | 58 | – | – |
| September | 60 | – | – |
| October | 62 | – | in progress |
| November | 58 | – | – |
| December | 61 | – | – |
| Year to date (Jan–Jul) | 270 | 194 | ▼ 28.1% |
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 | 89.7% | 80.7% | ▼ 10.0% |
| February | 64.3% | 96.0% | ▲ 49.3% |
| March | 54.8% | 85.7% | ▲ 56.3% |
| April | 92.3% | 88.5% | ▼ 4.2% |
| May | 82.1% | 79.3% | ▼ 3.3% |
| June | 84.8% | 70.4% | ▼ 17.0% |
| July | 70.4% | 63.0% | ▼ 10.5% |
| August | 79.3% | – | – |
| September | 88.3% | – | – |
| October | 88.7% | – | in progress |
| November | 74.1% | – | – |
| December | 75.4% | – | – |
| Year-to-date average (Jan–Jul) | 76.9% | 80.5% | ▲ 4.7% |
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 | 0 | 0 | – |
| February | 0 | 0 | – |
| March | 0 | 1 | – |
| April | 0 | 0 | – |
| May | 1 | 0 | ▼ 100.0% |
| June | 0 | 0 | – |
| July | 3 | 0 | ▼ 100.0% |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 4 | 1 | ▼ 75.0% |
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 99.4% 850
- Cancelled 0.6% 5
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 |
|---|---|---|---|---|
| SAN SFO San Diego International Airport – San Francisco International Airport | 719 | 18.7 min | 80.5% | 217 |
| AUS IAH Austin Bergstrom International Airport – George Bush Intercontinental Airport | 225 | 9.5 min | 81.4% | 184 |
| SFO DEN San Francisco International Airport – Denver International Airport | 1,553 | 10.3 min | 84.8% | 138 |
| SFO MCO San Francisco International Airport – Orlando International Airport | 3,929 | 21.4 min | 73.2% | 110 |
| PHX SFO Phoenix Sky Harbor International Airport – San Francisco International Airport | 1,047 | 5.0 min | 80.0% | 70 |
| ORD TYS Chicago O'Hare International Airport – McGhee Tyson Airport | 765 | 32.5 min | 57.8% | 45 |
| SFO DCA San Francisco International Airport – Ronald Reagan Washington National Airport | 3,921 | -1.8 min | 96.9% | 32 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 19 | 19 | 100.0% | 0 |
| November 2024 | 30 | 30 | 96.7% | 0 |
| December 2024 | 43 | 43 | 72.1% | 0 |
| January 2025 | 29 | 29 | 89.7% | 0 |
| February 2025 | 28 | 28 | 64.3% | 0 |
| March 2025 | 31 | 31 | 54.8% | 0 |
| April 2025 | 26 | 26 | 92.3% | 0 |
| May 2025 | 40 | 39 | 82.1% | 1 |
| June 2025 | 59 | 59 | 84.8% | 0 |
| July 2025 | 57 | 54 | 70.4% | 3 |
| August 2025 | 58 | 58 | 79.3% | 0 |
| September 2025 | 60 | 60 | 88.3% | 0 |
| October 2025 | 62 | 62 | 88.7% | 0 |
| November 2025 | 58 | 58 | 74.1% | 0 |
| December 2025 | 61 | 61 | 75.4% | 0 |
| January 2026 | 31 | 31 | 80.7% | 0 |
| February 2026 | 25 | 25 | 96.0% | 0 |
| March 2026 | 29 | 28 | 85.7% | 1 |
| April 2026 | 26 | 26 | 88.5% | 0 |
| May 2026 | 29 | 29 | 79.3% | 0 |
| June 2026 | 27 | 27 | 70.4% | 0 |
| July 2026 | 27 | 27 | 63.0% | 0 |