WN1204
WN1204 (Southwest Airlines) is a multi-stop service on 30 routes, busiest Baltimore to Chicago. Of 673 departures recorded from October 2024 to July 2026, 84.0% left on time, according to the US BTS.
- On-time departures84.0%of 673 flights
- Average delay8.2 min
- July 202619▼ 55.8%vs July 2025
- Cancelled0.9%
- Legs flown under this number30
Recorded departures by month
All legs under this number combined; see the leg table.
Months without data are left blank.
The most recent periods18 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 29 | 35 | ▲ 20.7% |
| February | 36 | 42 | ▲ 16.7% |
| March | 32 | 47 | ▲ 46.9% |
| April | 7 | 48 | ▲ 585.7% |
| May | – | 48 | – |
| June | 38 | 22 | ▼ 42.1% |
| July | 43 | 19 | ▼ 55.8% |
| August | 33 | – | – |
| September | 30 | – | – |
| October | 31 | – | in progress |
| November | 28 | – | – |
| December | 29 | – | – |
according to the US BTS · October 2024 → July 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 periods18 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 92.6% | 70.6% | ▼ 23.8% |
| February | 100.0% | 54.8% | ▼ 45.2% |
| March | 84.4% | 52.2% | ▼ 38.2% |
| April | 71.4% | 87.5% | ▲ 22.5% |
| May | – | 85.4% | – |
| June | 89.5% | 86.4% | ▼ 3.5% |
| July | 93.0% | 84.2% | ▼ 9.5% |
| August | 75.0% | – | – |
| September | 90.0% | – | – |
| October | 93.6% | – | in progress |
| November | 100.0% | – | – |
| December | 86.2% | – | – |
according to the US BTS · October 2024 → July 2026
Average departure delay by month
Months without data are left blank.
according to the US BTS · October 2024 → July 2026
Cancelled departures by month
Months without data are left blank.
The most recent periods18 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 2 | 1 | ▼ 50.0% |
| February | 0 | 0 | – |
| March | 0 | 1 | – |
| April | 0 | 0 | – |
| May | – | 0 | – |
| June | 0 | 0 | – |
| July | 0 | 0 | – |
| August | 1 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 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 99.1% 667
- Cancelled 0.9% 6
Share of all recorded flights in the period, all legs. · Oct 12, 2024 → Jul 29, 2026
On time, leg by leg
Departures within 15 minutes of schedule; small figure = departures recorded.
Legs flown under this number
9| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| BWI MDW Baltimore/Washington International Thurgood Marshall Airport – Chicago Midway International Airport | 981 | 2.1 min | 94.3% | 90 |
| DCA MSY Ronald Reagan Washington National Airport – Louis Armstrong New Orleans International Airport | 1,560 | 14.0 min | 63.2% | 58 |
| BNA ORD Nashville International Airport – Chicago O'Hare International Airport | 660 | 9.3 min | 87.9% | 58 |
| SRQ BNA Sarasota Bradenton International Airport – Nashville International Airport | 1,046 | 2.3 min | 92.7% | 55 |
| LAS BNA Harry Reid International Airport – Nashville International Airport | 2,549 | 5.9 min | 90.4% | 52 |
| BNA VPS Nashville International Airport – Destin-Fort Walton Beach Airport | 628 | 2.1 min | 92.0% | 50 |
| VPS DAL Destin-Fort Walton Beach Airport – Dallas Love Field | 1,012 | 5.7 min | 85.7% | 42 |
| TPA MCI Tampa International Airport – Kansas City International Airport | 1,687 | 17.2 min | 81.8% | 33 |
| HOU PHX William P. Hobby Airport – Phoenix Sky Harbor International Airport | 1,638 | -0.7 min | 93.6% | 31 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 20 | 20 | 95.0% | 0 |
| November 2024 | 28 | 28 | 92.9% | 0 |
| December 2024 | 28 | 27 | 96.3% | 1 |
| January 2025 | 29 | 27 | 92.6% | 2 |
| February 2025 | 36 | 36 | 100.0% | 0 |
| March 2025 | 32 | 32 | 84.4% | 0 |
| April 2025 | 7 | 7 | 71.4% | 0 |
| June 2025 | 38 | 38 | 89.5% | 0 |
| July 2025 | 43 | 43 | 93.0% | 0 |
| August 2025 | 33 | 32 | 75.0% | 1 |
| September 2025 | 30 | 30 | 90.0% | 0 |
| October 2025 | 31 | 31 | 93.6% | 0 |
| November 2025 | 28 | 28 | 100.0% | 0 |
| December 2025 | 29 | 29 | 86.2% | 0 |
| January 2026 | 35 | 34 | 70.6% | 1 |
| February 2026 | 42 | 42 | 54.8% | 0 |
| March 2026 | 47 | 46 | 52.2% | 1 |
| April 2026 | 48 | 48 | 87.5% | 0 |
| May 2026 | 48 | 48 | 85.4% | 0 |
| June 2026 | 22 | 22 | 86.4% | 0 |
| July 2026 | 19 | 19 | 84.2% | 0 |