AA1543
AA1543 (American Airlines) is a multi-stop service on 4 routes, busiest Chicago to San Diego. Of 651 departures recorded from October 2024 to July 2026, 70.4% left on time, according to the US BTS.
- On-time departures70.4%of 651 flights
- Average delay25.9 min
- July 202631▲ 0.0%vs July 2025
- Cancelled1.5%
- Legs flown under this number4
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 | 31 | 30 | ▼ 3.2% |
| February | 28 | 28 | 0.0% |
| March | 31 | 31 | 0.0% |
| April | 30 | 30 | 0.0% |
| May | 31 | 30 | ▼ 3.2% |
| June | 30 | 30 | 0.0% |
| July | 31 | 31 | 0.0% |
| August | 31 | – | – |
| September | 30 | – | – |
| October | 30 | – | in progress |
| November | 29 | – | – |
| December | 29 | – | – |
| Year to date (Jan–Jul) | 212 | 210 | ▼ 0.9% |
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 | 74.2% | 59.3% | ▼ 20.1% |
| February | 85.7% | 67.9% | ▼ 20.8% |
| March | 80.7% | 62.1% | ▼ 23.0% |
| April | 89.7% | 80.0% | ▼ 10.8% |
| May | 64.5% | 80.0% | ▲ 24.0% |
| June | 50.0% | 79.3% | ▲ 58.6% |
| July | 43.3% | 77.4% | ▲ 78.7% |
| August | 58.1% | – | – |
| September | 73.3% | – | – |
| October | 83.3% | – | in progress |
| November | 77.8% | – | – |
| December | 69.0% | – | – |
| Year-to-date average (Jan–Jul) | 69.7% | 72.3% | ▲ 3.7% |
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 | 3 | – |
| February | 0 | 0 | – |
| March | 0 | 2 | – |
| April | 1 | 0 | ▼ 100.0% |
| May | 0 | 0 | – |
| June | 0 | 1 | – |
| July | 1 | 0 | ▼ 100.0% |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 2 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 2 | 6 | ▲ 200.0% |
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 98.5% 641
- Cancelled 1.5% 10
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
3| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| ORD SAN Chicago O'Hare International Airport – San Diego International Airport | 2,768 | 28.3 min | 68.5% | 533 |
| SAN ORD San Diego International Airport – Chicago O'Hare International Airport | 2,768 | 13.1 min | 80.3% | 72 |
| LAS PHL Harry Reid International Airport – Philadelphia International Airport | 3,494 | 18.0 min | 76.7% | 43 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 20 | 20 | 65.0% | 0 |
| November 2024 | 29 | 29 | 72.4% | 0 |
| December 2024 | 31 | 31 | 54.8% | 0 |
| January 2025 | 31 | 31 | 74.2% | 0 |
| February 2025 | 28 | 28 | 85.7% | 0 |
| March 2025 | 31 | 31 | 80.7% | 0 |
| April 2025 | 30 | 29 | 89.7% | 1 |
| May 2025 | 31 | 31 | 64.5% | 0 |
| June 2025 | 30 | 30 | 50.0% | 0 |
| July 2025 | 31 | 30 | 43.3% | 1 |
| August 2025 | 31 | 31 | 58.1% | 0 |
| September 2025 | 30 | 30 | 73.3% | 0 |
| October 2025 | 30 | 30 | 83.3% | 0 |
| November 2025 | 29 | 27 | 77.8% | 2 |
| December 2025 | 29 | 29 | 69.0% | 0 |
| January 2026 | 30 | 27 | 59.3% | 3 |
| February 2026 | 28 | 28 | 67.9% | 0 |
| March 2026 | 31 | 29 | 62.1% | 2 |
| April 2026 | 30 | 30 | 80.0% | 0 |
| May 2026 | 30 | 30 | 80.0% | 0 |
| June 2026 | 30 | 29 | 79.3% | 1 |
| July 2026 | 31 | 31 | 77.4% | 0 |