UA1815
UA1815 (United Airlines) is a multi-stop service on 14 routes, busiest Chicago to Washington. Of 650 departures recorded from October 2024 to July 2026, 79.0% left on time, according to the US BTS.
- On-time departures79.0%of 650 flights
- Average delay11.8 min
- July 202631▲ 0.0%vs July 2025
- Cancelled0.6%
- Legs flown under this number14
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 | 31 | 31 | 0.0% |
| February | 26 | 27 | ▲ 3.8% |
| March | 45 | 24 | ▼ 46.7% |
| April | 30 | 26 | ▼ 13.3% |
| May | 31 | 25 | ▼ 19.4% |
| June | 30 | 30 | 0.0% |
| July | 31 | 31 | 0.0% |
| August | 31 | – | – |
| September | 30 | – | – |
| October | 31 | – | in progress |
| November | 29 | – | – |
| December | 31 | – | – |
| Year to date (Jan–Jul) | 224 | 194 | ▼ 13.4% |
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 | 87.1% | 90.0% | ▲ 3.3% |
| February | 76.9% | 92.3% | ▲ 20.0% |
| March | 75.6% | 91.7% | ▲ 21.3% |
| April | 66.7% | 73.1% | ▲ 9.6% |
| May | 45.2% | 84.0% | ▲ 86.0% |
| June | 46.7% | 73.3% | ▲ 57.1% |
| July | 71.0% | 74.2% | ▲ 4.5% |
| August | 80.0% | – | – |
| September | 96.7% | – | – |
| October | 93.6% | – | in progress |
| November | 82.1% | – | – |
| December | 87.1% | – | – |
| Year-to-date average (Jan–Jul) | 67.0% | 82.7% | ▲ 23.4% |
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 | 0 | 1 | – |
| February | 0 | 1 | – |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 0 | 0 | – |
| August | 1 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 1 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 0 | 2 |
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 99.4% 646
- Cancelled 0.6% 4
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
88 of 8
| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| ORD DCA Chicago O'Hare International Airport – Ronald Reagan Washington National Airport | 983 | 4.7 min | 90.6% | 196 |
| SFO BNA San Francisco International Airport – Nashville International Airport | 3,161 | 8.9 min | 79.7% | 123 |
| ORD MSY Chicago O'Hare International Airport – Louis Armstrong New Orleans International Airport | 1,349 | 16.4 min | 72.2% | 54 |
| ORD SFO Chicago O'Hare International Airport – San Francisco International Airport | 2,964 | 28.1 min | 54.7% | 53 |
| LAX DEN Los Angeles International Airport – Denver International Airport | 1,385 | 4.6 min | 86.5% | 37 |
| SFO BUR San Francisco International Airport – Hollywood Burbank/Bob Hope Airport | 525 | 29.1 min | 63.9% | 36 |
| EWR LAS Newark Liberty International Airport – Harry Reid International Airport | 3,576 | 11.1 min | 77.8% | 36 |
| DEN SMF Denver International Airport – Sacramento International Airport | 1,460 | 42.6 min | 42.9% | 35 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 20 | 20 | 100.0% | 0 |
| November 2024 | 29 | 29 | 75.9% | 0 |
| December 2024 | 31 | 31 | 87.1% | 0 |
| January 2025 | 31 | 31 | 87.1% | 0 |
| February 2025 | 26 | 26 | 76.9% | 0 |
| March 2025 | 45 | 45 | 75.6% | 0 |
| April 2025 | 30 | 30 | 66.7% | 0 |
| May 2025 | 31 | 31 | 45.2% | 0 |
| June 2025 | 30 | 30 | 46.7% | 0 |
| July 2025 | 31 | 31 | 71.0% | 0 |
| August 2025 | 31 | 30 | 80.0% | 1 |
| September 2025 | 30 | 30 | 96.7% | 0 |
| October 2025 | 31 | 31 | 93.6% | 0 |
| November 2025 | 29 | 28 | 82.1% | 1 |
| December 2025 | 31 | 31 | 87.1% | 0 |
| January 2026 | 31 | 30 | 90.0% | 1 |
| February 2026 | 27 | 26 | 92.3% | 1 |
| March 2026 | 24 | 24 | 91.7% | 0 |
| April 2026 | 26 | 26 | 73.1% | 0 |
| May 2026 | 25 | 25 | 84.0% | 0 |
| June 2026 | 30 | 30 | 73.3% | 0 |
| July 2026 | 31 | 31 | 74.2% | 0 |