WN4028
WN4028 (Southwest Airlines) is a multi-stop service on 30 routes, busiest Rochester to Baltimore. Of 541 departures recorded from October 2024 to July 2026, 74.3% left on time, according to the US BTS.
- On-time departures74.3%of 541 flights
- Average delay16.9 min
- July 202625▼ 53.7%vs July 2025
- Cancelled1.3%
- Legs flown under this number30
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 | 4 | 3 | ▼ 25.0% |
| February | 2 | 10 | ▲ 400.0% |
| March | 35 | 27 | ▼ 22.9% |
| April | 40 | 30 | ▼ 25.0% |
| May | 39 | 31 | ▼ 20.5% |
| June | 50 | 14 | ▼ 72.0% |
| July | 54 | 25 | ▼ 53.7% |
| August | 32 | – | – |
| September | 30 | – | – |
| October | 47 | – | in progress |
| November | 7 | – | – |
| December | 11 | – | – |
| Year to date (Jan–Jul) | 224 | 140 | ▼ 37.5% |
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 | 100.0% | 33.3% | ▼ 66.7% |
| February | 50.0% | 77.8% | ▲ 55.6% |
| March | 55.9% | 88.0% | ▲ 57.5% |
| April | 65.0% | 96.7% | ▲ 48.7% |
| May | 61.5% | 100.0% | ▲ 62.5% |
| June | 64.0% | 100.0% | ▲ 56.3% |
| July | 52.8% | 92.0% | ▲ 74.1% |
| August | 80.7% | – | – |
| September | 75.9% | – | – |
| October | 87.2% | – | in progress |
| November | 28.6% | – | – |
| December | 9.1% | – | – |
| Year-to-date average (Jan–Jul) | 64.2% | 84.0% | ▲ 30.8% |
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 | 1 | – |
| March | 1 | 2 | ▲ 100.0% |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 1 | 0 | ▼ 100.0% |
| August | 1 | – | – |
| September | 1 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 2 | 3 | ▲ 50.0% |
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 98.7% 534
- Cancelled 1.3% 7
Share of all recorded flights in the period, all legs. · Oct 13, 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 |
|---|---|---|---|---|
| ROC BWI Frederick Douglass Greater Rochester International Airport – Baltimore/Washington International Thurgood Marshall Airport | 447 | -3.6 min | 100.0% | 58 |
| LGB SLC Long Beach International Airport – Salt Lake City International Airport | 948 | 19.7 min | 70.7% | 58 |
| PHX DAL Phoenix Sky Harbor International Airport – Dallas Love Field | 1,412 | 12.0 min | 78.2% | 57 |
| MDW LAS Chicago Midway International Airport – Harry Reid International Airport | 2,442 | 26.1 min | 52.9% | 52 |
| MKE TPA General Mitchell International Airport – Tampa International Airport | 1,733 | 9.7 min | 90.0% | 32 |
| MEM DAL Frederick W. Smith International Airport – Dallas Love Field | 679 | 12.8 min | 83.3% | 30 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 17 | 17 | 82.4% | 0 |
| November 2024 | 11 | 11 | 100.0% | 0 |
| December 2024 | 22 | 22 | 90.9% | 0 |
| January 2025 | 4 | 4 | 100.0% | 0 |
| February 2025 | 2 | 2 | 50.0% | 0 |
| March 2025 | 35 | 34 | 55.9% | 1 |
| April 2025 | 40 | 40 | 65.0% | 0 |
| May 2025 | 39 | 39 | 61.5% | 0 |
| June 2025 | 50 | 50 | 64.0% | 0 |
| July 2025 | 54 | 53 | 52.8% | 1 |
| August 2025 | 32 | 31 | 80.7% | 1 |
| September 2025 | 30 | 29 | 75.9% | 1 |
| October 2025 | 47 | 47 | 87.2% | 0 |
| November 2025 | 7 | 7 | 28.6% | 0 |
| December 2025 | 11 | 11 | 9.1% | 0 |
| January 2026 | 3 | 3 | 33.3% | 0 |
| February 2026 | 10 | 9 | 77.8% | 1 |
| March 2026 | 27 | 25 | 88.0% | 2 |
| April 2026 | 30 | 30 | 96.7% | 0 |
| May 2026 | 31 | 31 | 100.0% | 0 |
| June 2026 | 14 | 14 | 100.0% | 0 |
| July 2026 | 25 | 25 | 92.0% | 0 |