WN1827
WN1827 (Southwest Airlines) is a multi-stop service on 37 routes, busiest Baltimore to Milwaukee. Of 580 departures recorded from October 2024 to July 2026, 71.4% left on time, according to the US BTS.
- On-time departures71.4%of 580 flights
- Average delay14.0 min
- July 202611▼ 78.0%vs July 2025
- Cancelled1.0%
- Legs flown under this number37
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 | 10 | 14 | ▲ 40.0% |
| February | 19 | 9 | ▼ 52.6% |
| March | 29 | 100 | ▲ 244.8% |
| April | 25 | 37 | ▲ 48.0% |
| May | 25 | 18 | ▼ 28.0% |
| June | 49 | 8 | ▼ 83.7% |
| July | 50 | 11 | ▼ 78.0% |
| August | 30 | – | – |
| September | 26 | – | – |
| October | 30 | – | in progress |
| November | 32 | – | – |
| December | 33 | – | – |
| Year to date (Jan–Jul) | 207 | 197 | ▼ 4.8% |
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 | 80.0% | 85.7% | ▲ 7.1% |
| February | 63.2% | 88.9% | ▲ 40.7% |
| March | 78.6% | 67.0% | ▼ 14.7% |
| April | 76.0% | 62.2% | ▼ 18.2% |
| May | 48.0% | 33.3% | ▼ 30.6% |
| June | 83.7% | 75.0% | ▼ 10.4% |
| July | 84.0% | 50.0% | ▼ 40.5% |
| August | 86.2% | – | – |
| September | 100.0% | – | – |
| October | 70.0% | – | in progress |
| November | 71.9% | – | – |
| December | 45.5% | – | – |
| Year-to-date average (Jan–Jul) | 73.3% | 66.0% | ▼ 10.0% |
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 | 0 | – |
| February | 0 | 0 | – |
| March | 1 | 3 | ▲ 200.0% |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 0 | 1 | – |
| August | 1 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 1 | 4 | ▲ 300.0% |
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 99.0% 574
- Cancelled 1.0% 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
6| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| BWI MKE Baltimore/Washington International Thurgood Marshall Airport – General Mitchell International Airport | 1,030 | 0.8 min | 91.8% | 50 |
| BWI ALB Baltimore/Washington International Thurgood Marshall Airport – Albany International Airport | 464 | 9.9 min | 78.6% | 42 |
| DEN BWI Denver International Airport – Baltimore/Washington International Thurgood Marshall Airport | 2,394 | 0.7 min | 97.1% | 35 |
| DEN BUR Denver International Airport – Hollywood Burbank/Bob Hope Airport | 1,366 | 33.5 min | 39.4% | 33 |
| DEN CMH Denver International Airport – John Glenn Columbus International Airport | 1,853 | 24.7 min | 38.7% | 31 |
| SJC ONT Mineta San Jose International Airport – Ontario International Airport | 536 | 22.5 min | 70.0% | 30 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 13 | 13 | 92.3% | 0 |
| November 2024 | 4 | 4 | 100.0% | 0 |
| December 2024 | 8 | 8 | 37.5% | 0 |
| January 2025 | 10 | 10 | 80.0% | 0 |
| February 2025 | 19 | 19 | 63.2% | 0 |
| March 2025 | 29 | 28 | 78.6% | 1 |
| April 2025 | 25 | 25 | 76.0% | 0 |
| May 2025 | 25 | 25 | 48.0% | 0 |
| June 2025 | 49 | 49 | 83.7% | 0 |
| July 2025 | 50 | 50 | 84.0% | 0 |
| August 2025 | 30 | 29 | 86.2% | 1 |
| September 2025 | 26 | 26 | 100.0% | 0 |
| October 2025 | 30 | 30 | 70.0% | 0 |
| November 2025 | 32 | 32 | 71.9% | 0 |
| December 2025 | 33 | 33 | 45.5% | 0 |
| January 2026 | 14 | 14 | 85.7% | 0 |
| February 2026 | 9 | 9 | 88.9% | 0 |
| March 2026 | 100 | 97 | 67.0% | 3 |
| April 2026 | 37 | 37 | 62.2% | 0 |
| May 2026 | 18 | 18 | 33.3% | 0 |
| June 2026 | 8 | 8 | 75.0% | 0 |
| July 2026 | 11 | 10 | 50.0% | 1 |