UA573
UA573 (United Airlines) is a multi-stop service on 15 routes, busiest San Francisco to Seattle. Of 850 departures recorded from October 2024 to July 2026, 84.2% left on time, according to the US BTS.
- On-time departures84.2%of 850 flights
- Average delay7.9 min
- July 202653▲ 71.0%vs July 2025
- Cancelled0.4%
- Legs flown under this number15
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 | 62 | 31 | ▼ 50.0% |
| February | 54 | 28 | ▼ 48.1% |
| March | 54 | 31 | ▼ 42.6% |
| April | 60 | 30 | ▼ 50.0% |
| May | 38 | 31 | ▼ 18.4% |
| June | 49 | 36 | ▼ 26.5% |
| July | 31 | 53 | ▲ 71.0% |
| August | 31 | – | – |
| September | 36 | – | – |
| October | 52 | – | in progress |
| November | 19 | – | – |
| December | 31 | – | – |
| Year to date (Jan–Jul) | 348 | 240 | ▼ 31.0% |
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 | 77.1% | 96.8% | ▲ 25.6% |
| February | 85.2% | 96.4% | ▲ 13.2% |
| March | 96.2% | 86.7% | ▼ 9.9% |
| April | 95.0% | 70.0% | ▼ 26.3% |
| May | 73.7% | 74.2% | ▲ 0.7% |
| June | 83.7% | 80.6% | ▼ 3.7% |
| July | 74.2% | 73.6% | ▼ 0.8% |
| August | 80.7% | – | – |
| September | 86.1% | – | – |
| October | 80.8% | – | in progress |
| November | 57.9% | – | – |
| December | 96.8% | – | – |
| Year-to-date average (Jan–Jul) | 83.6% | 82.6% | ▼ 1.2% |
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 | 0 | 0 | – |
| March | 1 | 1 | 0.0% |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 2 | 1 | ▼ 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 99.6% 847
- Cancelled 0.4% 3
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 |
|---|---|---|---|---|
| SFO SEA San Francisco International Airport – Seattle–Tacoma International Airport | 1,093 | 7.4 min | 85.6% | 188 |
| SFO OGG San Francisco International Airport – Kahului International Airport | 3,761 | 4.8 min | 87.5% | 168 |
| DEN SFO Denver International Airport – San Francisco International Airport | 1,553 | 4.7 min | 89.5% | 164 |
| BOI ORD Boise Air Terminal/Gowen Field – Chicago O'Hare International Airport | 2,307 | 10.4 min | 81.0% | 121 |
| IND SFO Indianapolis International Airport – San Francisco International Airport | 3,120 | 5.6 min | 80.5% | 41 |
| MIA EWR Miami International Airport – Newark Liberty International Airport | 1,750 | 28.8 min | 65.6% | 32 |
| ORD IAH Chicago O'Hare International Airport – George Bush Intercontinental Airport | 1,491 | 9.6 min | 83.9% | 31 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 20 | 20 | 95.0% | 0 |
| November 2024 | 30 | 30 | 93.3% | 0 |
| December 2024 | 43 | 43 | 90.7% | 0 |
| January 2025 | 62 | 61 | 77.1% | 1 |
| February 2025 | 54 | 54 | 85.2% | 0 |
| March 2025 | 54 | 53 | 96.2% | 1 |
| April 2025 | 60 | 60 | 95.0% | 0 |
| May 2025 | 38 | 38 | 73.7% | 0 |
| June 2025 | 49 | 49 | 83.7% | 0 |
| July 2025 | 31 | 31 | 74.2% | 0 |
| August 2025 | 31 | 31 | 80.7% | 0 |
| September 2025 | 36 | 36 | 86.1% | 0 |
| October 2025 | 52 | 52 | 80.8% | 0 |
| November 2025 | 19 | 19 | 57.9% | 0 |
| December 2025 | 31 | 31 | 96.8% | 0 |
| January 2026 | 31 | 31 | 96.8% | 0 |
| February 2026 | 28 | 28 | 96.4% | 0 |
| March 2026 | 31 | 30 | 86.7% | 1 |
| April 2026 | 30 | 30 | 70.0% | 0 |
| May 2026 | 31 | 31 | 74.2% | 0 |
| June 2026 | 36 | 36 | 80.6% | 0 |
| July 2026 | 53 | 53 | 73.6% | 0 |