AA639
AA639 (American Airlines) is a multi-stop service on 7 routes, busiest Chicago to Tucson. Of 324 departures recorded from October 2024 to June 2026, 77.4% left on time, according to the US BTS.
- On-time departures77.4%of 324 flights
- Average delay17.5 min
- June 20265▲ 25.0%vs June 2025
- Cancelled0.3%
- Legs flown under this number7
Recorded departures by month
All legs under this number combined; see the leg table.
Months without data are left blank.
The most recent periods13 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 6 | – | – |
| February | 16 | – | – |
| March | 31 | – | – |
| April | 30 | 24 | ▼ 20.0% |
| May | 31 | 20 | ▼ 35.5% |
| June | 4 | 5 | ▲ 25.0% |
| July | – | – | – |
| August | – | – | – |
| September | 48 | – | – |
| October | 8 | – | in progress |
| November | 9 | – | – |
| December | 1 | – | – |
according to the US BTS · October 2024 → June 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 periods13 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 83.3% | – | – |
| February | 75.0% | – | – |
| March | 71.0% | – | – |
| April | 76.7% | 60.9% | ▼ 20.6% |
| May | 61.3% | 45.0% | ▼ 26.6% |
| June | 75.0% | 60.0% | ▼ 20.0% |
| July | – | – | – |
| August | – | – | – |
| September | 97.9% | – | – |
| October | 100.0% | – | in progress |
| November | 77.8% | – | – |
| December | 0.0% | – | – |
according to the US BTS · October 2024 → June 2026
Average departure delay by month
Months without data are left blank.
according to the US BTS · October 2024 → June 2026
Cancelled departures by month
Months without data are left blank.
The most recent periods13 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 0 | – | – |
| February | 0 | – | – |
| March | 0 | – | – |
| April | 0 | 1 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | – | – | – |
| August | – | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
according to the US BTS · October 2024 → June 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 99.7% 323
- Cancelled 0.3% 1
Share of all recorded flights in the period, all legs. · Oct 12, 2024 → Jun 21, 2026
On time, leg by leg
Departures within 15 minutes of schedule; small figure = departures recorded.
Legs flown under this number
2| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| ORD TUS Chicago O'Hare International Airport – Tucson International Airport | 2,309 | 24.3 min | 67.6% | 180 |
| PHL PHX Philadelphia International Airport – Phoenix Sky Harbor International Airport | 3,332 | 17.2 min | 88.5% | 61 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 30 | 30 | 80.0% | 0 |
| November 2024 | 30 | 30 | 93.3% | 0 |
| December 2024 | 31 | 31 | 83.9% | 0 |
| January 2025 | 6 | 6 | 83.3% | 0 |
| February 2025 | 16 | 16 | 75.0% | 0 |
| March 2025 | 31 | 31 | 71.0% | 0 |
| April 2025 | 30 | 30 | 76.7% | 0 |
| May 2025 | 31 | 31 | 61.3% | 0 |
| June 2025 | 4 | 4 | 75.0% | 0 |
| September 2025 | 48 | 48 | 97.9% | 0 |
| October 2025 | 8 | 8 | 100.0% | 0 |
| November 2025 | 9 | 9 | 77.8% | 0 |
| December 2025 | 1 | 1 | 0.0% | 0 |
| April 2026 | 24 | 23 | 60.9% | 1 |
| May 2026 | 20 | 20 | 45.0% | 0 |
| June 2026 | 5 | 5 | 60.0% | 0 |