WN1644
WN1644 (Southwest Airlines) is a multi-stop service on 26 routes, busiest Atlanta to Baltimore. Of 691 departures recorded from October 2024 to July 2026, 82.0% left on time, according to the US BTS.
- On-time departures82.0%of 691 flights
- Average delay8.7 min
- July 20265▼ 87.5%vs July 2025
- Cancelled1.0%
- Legs flown under this number26
according to the US BTS · Oct 12, 2024 → Jul 25, 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 | 29 | 31 | ▲ 6.9% |
| February | 28 | 28 | 0.0% |
| March | 27 | 39 | ▲ 44.4% |
| April | 41 | 53 | ▲ 29.3% |
| May | 48 | 57 | ▲ 18.8% |
| June | 38 | 17 | ▼ 55.3% |
| July | 40 | 5 | ▼ 87.5% |
| August | 27 | – | – |
| September | 26 | – | – |
| October | 35 | – | in progress |
| November | 30 | – | – |
| December | 31 | – | – |
| Year to date (Jan–Jul) | 251 | 230 | ▼ 8.4% |
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 | 81.5% | 79.3% | ▼ 2.7% |
| February | 78.6% | 88.9% | ▲ 13.1% |
| March | 92.6% | 92.3% | ▼ 0.3% |
| April | 87.8% | 86.8% | ▼ 1.2% |
| May | 95.8% | 80.7% | ▼ 15.8% |
| June | 79.0% | 58.8% | ▼ 25.5% |
| July | 81.6% | 20.0% | ▼ 75.5% |
| August | 74.1% | – | – |
| September | 80.8% | – | – |
| October | 65.7% | – | in progress |
| November | 73.3% | – | – |
| December | 58.1% | – | – |
| Year-to-date average (Jan–Jul) | 85.3% | 72.4% | ▼ 15.1% |
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 | 2 | 2 | 0.0% |
| February | 0 | 1 | – |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 2 | 0 | ▼ 100.0% |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 4 | 3 | ▼ 25.0% |
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 99.0% 684
- Cancelled 1.0% 7
Share of all recorded flights in the period, all legs. · Oct 12, 2024 → Jul 25, 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 |
|---|---|---|---|---|
| ATL BWI Hartsfield Jackson Atlanta International Airport – Baltimore/Washington International Thurgood Marshall Airport | 928 | 8.5 min | 86.3% | 97 |
| DEN JAX Denver International Airport – Jacksonville International Airport | 2,325 | 20.8 min | 65.6% | 64 |
| MDW MCI Chicago Midway International Airport – Kansas City International Airport | 650 | 0.0 min | 93.1% | 58 |
| BNA PHL Nashville International Airport – Philadelphia International Airport | 1,084 | 4.4 min | 85.5% | 58 |
| MCO SRQ Orlando International Airport – Sarasota Bradenton International Airport | 168 | 6.1 min | 88.0% | 50 |
| LAS MSY Harry Reid International Airport – Louis Armstrong New Orleans International Airport | 2,409 | 7.1 min | 79.6% | 49 |
| BWI DEN Baltimore/Washington International Thurgood Marshall Airport – Denver International Airport | 2,394 | 13.2 min | 76.2% | 43 |
| PHX BUR Phoenix Sky Harbor International Airport – Hollywood Burbank/Bob Hope Airport | 593 | 20.7 min | 64.5% | 31 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 20 | 20 | 100.0% | 0 |
| November 2024 | 15 | 15 | 93.3% | 0 |
| December 2024 | 26 | 26 | 96.2% | 0 |
| January 2025 | 29 | 27 | 81.5% | 2 |
| February 2025 | 28 | 28 | 78.6% | 0 |
| March 2025 | 27 | 27 | 92.6% | 0 |
| April 2025 | 41 | 41 | 87.8% | 0 |
| May 2025 | 48 | 48 | 95.8% | 0 |
| June 2025 | 38 | 38 | 79.0% | 0 |
| July 2025 | 40 | 38 | 81.6% | 2 |
| August 2025 | 27 | 27 | 74.1% | 0 |
| September 2025 | 26 | 26 | 80.8% | 0 |
| October 2025 | 35 | 35 | 65.7% | 0 |
| November 2025 | 30 | 30 | 73.3% | 0 |
| December 2025 | 31 | 31 | 58.1% | 0 |
| January 2026 | 31 | 29 | 79.3% | 2 |
| February 2026 | 28 | 27 | 88.9% | 1 |
| March 2026 | 39 | 39 | 92.3% | 0 |
| April 2026 | 53 | 53 | 86.8% | 0 |
| May 2026 | 57 | 57 | 80.7% | 0 |
| June 2026 | 17 | 17 | 58.8% | 0 |
| July 2026 | 5 | 5 | 20.0% | 0 |