UA1870
UA1870 (United Airlines) is a multi-stop service on 12 routes, busiest San Francisco to Dulles. Of 827 departures recorded from October 2024 to July 2026, 73.1% left on time, according to the US BTS.
- On-time departures73.1%of 827 flights
- Average delay19.2 min
- July 202630▼ 50.8%vs July 2025
- Cancelled0.7%
- Legs flown under this number12
Recorded departures by month
All legs under this number combined; see the leg table.
Months without data are left blank.
The most recent periods19 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 20 | 31 | ▲ 55.0% |
| February | 16 | 28 | ▲ 75.0% |
| March | 42 | 34 | ▼ 19.0% |
| April | 56 | 60 | ▲ 7.1% |
| May | 41 | 48 | ▲ 17.1% |
| June | 60 | 30 | ▼ 50.0% |
| July | 61 | 30 | ▼ 50.8% |
| August | 49 | – | – |
| September | 30 | – | – |
| October | 37 | – | in progress |
| November | 58 | – | – |
| December | 47 | – | – |
| Year to date (Jan–Jul) | 296 | 261 | ▼ 11.8% |
according to the US BTS · October 2024 → July 2026
On-time departures by month
Months without data are left blank.
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 | 79.0% | 86.7% | ▲ 9.8% |
| February | 62.5% | 89.3% | ▲ 42.9% |
| March | 71.4% | 93.9% | ▲ 31.5% |
| April | 82.1% | 55.0% | ▼ 33.0% |
| May | 65.0% | 58.3% | ▼ 10.3% |
| June | 60.0% | 83.3% | ▲ 38.9% |
| July | 67.2% | 60.0% | ▼ 10.7% |
| August | 83.0% | – | – |
| September | 70.0% | – | – |
| October | 75.7% | – | in progress |
| November | 70.7% | – | – |
| December | 91.5% | – | – |
| Year-to-date average (Jan–Jul) | 69.6% | 75.2% | ▲ 8.1% |
according to the US BTS · October 2024 → July 2026
Average departure delay by month
Months without data are left blank.
according to the US BTS · October 2024 → July 2026
Cancelled departures by month
Months without data are left blank.
The most recent periods19 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 1 | 1 | 0.0% |
| February | 0 | 0 | – |
| March | 0 | 1 | – |
| April | 0 | 0 | – |
| May | 1 | 0 | ▼ 100.0% |
| June | 0 | 0 | – |
| July | 0 | 0 | – |
| August | 2 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 2 | 2 | 0.0% |
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 99.3% 821
- Cancelled 0.7% 6
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
6| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| SFO IAD San Francisco International Airport – Washington Dulles International Airport | 3,883 | 12.1 min | 79.3% | 367 |
| MSY SFO Louis Armstrong New Orleans International Airport – San Francisco International Airport | 3,069 | 20.3 min | 76.2% | 126 |
| SNA SFO John Wayne Orange County International Airport – San Francisco International Airport | 598 | 19.0 min | 65.5% | 88 |
| EGE DEN Eagle County Regional Airport – Denver International Airport | 193 | 21.8 min | 70.4% | 71 |
| EUG SFO Eugene Airport – San Francisco International Airport | 727 | 23.9 min | 71.2% | 52 |
| PSP SFO Palm Springs International Airport – San Francisco International Airport | 677 | 53.7 min | 32.0% | 50 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 19 | 19 | 100.0% | 0 |
| December 2024 | 30 | 30 | 63.3% | 0 |
| January 2025 | 20 | 19 | 79.0% | 1 |
| February 2025 | 16 | 16 | 62.5% | 0 |
| March 2025 | 42 | 42 | 71.4% | 0 |
| April 2025 | 56 | 56 | 82.1% | 0 |
| May 2025 | 41 | 40 | 65.0% | 1 |
| June 2025 | 60 | 60 | 60.0% | 0 |
| July 2025 | 61 | 61 | 67.2% | 0 |
| August 2025 | 49 | 47 | 83.0% | 2 |
| September 2025 | 30 | 30 | 70.0% | 0 |
| October 2025 | 37 | 37 | 75.7% | 0 |
| November 2025 | 58 | 58 | 70.7% | 0 |
| December 2025 | 47 | 47 | 91.5% | 0 |
| January 2026 | 31 | 30 | 86.7% | 1 |
| February 2026 | 28 | 28 | 89.3% | 0 |
| March 2026 | 34 | 33 | 93.9% | 1 |
| April 2026 | 60 | 60 | 55.0% | 0 |
| May 2026 | 48 | 48 | 58.3% | 0 |
| June 2026 | 30 | 30 | 83.3% | 0 |
| July 2026 | 30 | 30 | 60.0% | 0 |