WN4030
WN4030 (Southwest Airlines) is a multi-stop service on 26 routes, busiest Rochester to Chicago. Of 451 departures recorded from October 2024 to July 2026, 75.1% left on time, according to the US BTS.
- On-time departures75.1%of 451 flights
- Average delay12.9 min
- July 202637▲ 105.6%vs July 2025
- Cancelled1.3%
- Legs flown under this number26
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 | 20 | 26 | ▲ 30.0% |
| February | 11 | 28 | ▲ 154.5% |
| March | 49 | 4 | ▼ 91.8% |
| April | 21 | 24 | ▲ 14.3% |
| May | 15 | 31 | ▲ 106.7% |
| June | 15 | 25 | ▲ 66.7% |
| July | 18 | 37 | ▲ 105.6% |
| August | 25 | – | – |
| September | 26 | – | – |
| October | 5 | – | in progress |
| November | 2 | – | – |
| December | – | – | – |
| Year to date (Jan–Jul) | 149 | 175 | ▲ 17.4% |
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 | 95.0% | 75.0% | ▼ 21.1% |
| February | 100.0% | 64.3% | ▼ 35.7% |
| March | 61.2% | 50.0% | ▼ 18.3% |
| April | 76.2% | 95.8% | ▲ 25.8% |
| May | 73.3% | 96.8% | ▲ 32.0% |
| June | 40.0% | 76.0% | ▲ 90.0% |
| July | 55.6% | 72.2% | ▲ 30.0% |
| August | 64.0% | – | – |
| September | 73.1% | – | – |
| October | 20.0% | – | in progress |
| November | 0.0% | – | – |
| December | – | – | – |
| Year-to-date average (Jan–Jul) | 71.6% | 75.7% | ▲ 5.7% |
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 | 0 | 2 | – |
| February | 1 | 0 | ▼ 100.0% |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 0 | 1 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 1 | – | – |
| December | – | – | – |
| Year to date (Jan–Jul) | 1 | 3 | ▲ 200.0% |
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% 445
- Cancelled 1.3% 6
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
5| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| ROC MDW Frederick Douglass Greater Rochester International Airport – Chicago Midway International Airport | 840 | -1.3 min | 96.6% | 58 |
| OAK BUR Oakland San Francisco Bay Airport – Hollywood Burbank/Bob Hope Airport | 523 | 0.6 min | 90.0% | 52 |
| PHX DAL Phoenix Sky Harbor International Airport – Dallas Love Field | 1,412 | 23.8 min | 70.0% | 50 |
| DAL MAF Dallas Love Field – Midland International Air and Space Port | 513 | 13.1 min | 71.1% | 47 |
| PHX MSY Phoenix Sky Harbor International Airport – Louis Armstrong New Orleans International Airport | 2,088 | 31.9 min | 47.1% | 34 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 20 | 20 | 90.0% | 0 |
| November 2024 | 25 | 24 | 91.7% | 1 |
| December 2024 | 24 | 24 | 83.3% | 0 |
| January 2025 | 20 | 20 | 95.0% | 0 |
| February 2025 | 11 | 10 | 100.0% | 1 |
| March 2025 | 49 | 49 | 61.2% | 0 |
| April 2025 | 21 | 21 | 76.2% | 0 |
| May 2025 | 15 | 15 | 73.3% | 0 |
| June 2025 | 15 | 15 | 40.0% | 0 |
| July 2025 | 18 | 18 | 55.6% | 0 |
| August 2025 | 25 | 25 | 64.0% | 0 |
| September 2025 | 26 | 26 | 73.1% | 0 |
| October 2025 | 5 | 5 | 20.0% | 0 |
| November 2025 | 2 | 1 | 0.0% | 1 |
| January 2026 | 26 | 24 | 75.0% | 2 |
| February 2026 | 28 | 28 | 64.3% | 0 |
| March 2026 | 4 | 4 | 50.0% | 0 |
| April 2026 | 24 | 24 | 95.8% | 0 |
| May 2026 | 31 | 31 | 96.8% | 0 |
| June 2026 | 25 | 25 | 76.0% | 0 |
| July 2026 | 37 | 36 | 72.2% | 1 |