AA1637
AA1637 (American Airlines) is a multi-stop service on 9 routes, busiest Washington to Chicago. Of 620 departures recorded from October 2024 to July 2026, 78.8% left on time, according to the US BTS.
- On-time departures78.8%of 620 flights
- Average delay18.4 min
- July 202629▼ 6.5%vs July 2025
- Cancelled3.2%
- Legs flown under this number9
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 | 11 | ▼ 60.7% |
| March | 31 | 24 | ▼ 22.6% |
| April | 30 | 30 | 0.0% |
| May | 31 | 31 | 0.0% |
| June | 30 | 30 | 0.0% |
| July | 31 | 29 | ▼ 6.5% |
| August | 31 | – | – |
| September | 30 | – | – |
| October | 31 | – | in progress |
| November | 30 | – | – |
| December | 20 | – | – |
| Year to date (Jan–Jul) | 212 | 185 | ▼ 12.7% |
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 | 90.0% | 92.6% | ▲ 2.9% |
| February | 66.7% | 70.0% | ▲ 5.0% |
| March | 83.3% | 87.5% | ▲ 5.0% |
| April | 89.7% | 67.9% | ▼ 24.3% |
| May | 58.1% | 72.4% | ▲ 24.7% |
| June | 85.7% | 62.1% | ▼ 27.6% |
| July | 60.0% | 48.2% | ▼ 19.8% |
| August | 90.3% | – | – |
| September | 86.7% | – | – |
| October | 83.3% | – | in progress |
| November | 96.7% | – | – |
| December | 84.2% | – | – |
| Year-to-date average (Jan–Jul) | 76.2% | 71.5% | ▼ 6.2% |
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 | 3 | ▲ 200.0% |
| February | 1 | 1 | 0.0% |
| March | 1 | 0 | ▼ 100.0% |
| April | 1 | 2 | ▲ 100.0% |
| May | 0 | 2 | – |
| June | 2 | 1 | ▼ 50.0% |
| July | 1 | 2 | ▲ 100.0% |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 1 | – | in progress |
| November | 0 | – | – |
| December | 1 | – | – |
| Year to date (Jan–Jul) | 7 | 11 | ▲ 57.1% |
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 96.8% 600
- Cancelled 3.2% 20
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 |
|---|---|---|---|---|
| DCA ORD Ronald Reagan Washington National Airport – Chicago O'Hare International Airport | 983 | 22.1 min | 78.7% | 217 |
| ORD DCA Chicago O'Hare International Airport – Ronald Reagan Washington National Airport | 983 | 12.6 min | 79.2% | 189 |
| BWI CLT Baltimore/Washington International Thurgood Marshall Airport – Charlotte Douglas International Airport | 581 | 54.1 min | 58.2% | 70 |
| PHX CLT Phoenix Sky Harbor International Airport – Charlotte Douglas International Airport | 2,848 | 3.2 min | 87.5% | 36 |
| IAD CLT Washington Dulles International Airport – Charlotte Douglas International Airport | 517 | 0.7 min | 96.8% | 31 |
| CLT PHX Charlotte Douglas International Airport – Phoenix Sky Harbor International Airport | 2,848 | 2.5 min | 83.3% | 30 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 20 | 20 | 90.0% | 0 |
| November 2024 | 30 | 30 | 96.7% | 0 |
| December 2024 | 31 | 31 | 71.0% | 0 |
| January 2025 | 31 | 30 | 90.0% | 1 |
| February 2025 | 28 | 27 | 66.7% | 1 |
| March 2025 | 31 | 30 | 83.3% | 1 |
| April 2025 | 30 | 29 | 89.7% | 1 |
| May 2025 | 31 | 31 | 58.1% | 0 |
| June 2025 | 30 | 28 | 85.7% | 2 |
| July 2025 | 31 | 30 | 60.0% | 1 |
| August 2025 | 31 | 31 | 90.3% | 0 |
| September 2025 | 30 | 30 | 86.7% | 0 |
| October 2025 | 31 | 30 | 83.3% | 1 |
| November 2025 | 30 | 30 | 96.7% | 0 |
| December 2025 | 20 | 19 | 84.2% | 1 |
| January 2026 | 30 | 27 | 92.6% | 3 |
| February 2026 | 11 | 10 | 70.0% | 1 |
| March 2026 | 24 | 24 | 87.5% | 0 |
| April 2026 | 30 | 28 | 67.9% | 2 |
| May 2026 | 31 | 29 | 72.4% | 2 |
| June 2026 | 30 | 29 | 62.1% | 1 |
| July 2026 | 29 | 27 | 48.2% | 2 |