WN4498
WN4498 (Southwest Airlines) is a multi-stop service on 14 routes, busiest Chicago to Buffalo. Of 242 departures recorded from November 2024 to July 2026, 62.3% left on time, according to the US BTS.
- On-time departures62.3%of 242 flights
- Average delay26.2 min
- July 202627▲ 68.8%vs July 2025
- Cancelled2.5%
- Legs flown under this number14
Recorded departures by month
All legs under this number combined; see the leg table.
Months without data are left blank.
The most recent periods14 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 2 | 12 | ▲ 500.0% |
| February | 8 | 12 | ▲ 50.0% |
| March | 1 | 2 | ▲ 100.0% |
| April | – | – | – |
| May | – | – | – |
| June | 16 | 23 | ▲ 43.8% |
| July | 16 | 27 | ▲ 68.8% |
| August | 8 | – | – |
| September | 4 | – | – |
| October | – | – | in progress |
| November | 44 | – | – |
| December | 46 | – | – |
according to the US BTS · November 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 periods14 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 0.0% | 83.3% | – |
| February | 87.5% | 91.7% | ▲ 4.8% |
| March | 100.0% | 50.0% | ▼ 50.0% |
| April | – | – | – |
| May | – | – | – |
| June | 25.0% | 36.4% | ▲ 45.4% |
| July | 62.5% | 38.5% | ▼ 38.5% |
| August | 25.0% | – | – |
| September | 50.0% | – | – |
| October | – | – | in progress |
| November | 79.1% | – | – |
| December | 68.2% | – | – |
according to the US BTS · November 2024 → July 2026
Average departure delay by month
Months without data are left blank.
according to the US BTS · November 2024 → July 2026
Cancelled departures by month
Months without data are left blank.
The most recent periods14 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 0 | 0 | – |
| February | 0 | 0 | – |
| March | 0 | 0 | – |
| April | – | – | – |
| May | – | – | – |
| June | 0 | 1 | – |
| July | 0 | 1 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | – | – | in progress |
| November | 1 | – | – |
| December | 2 | – | – |
according to the US BTS · November 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 97.5% 236
- Cancelled 2.5% 6
Share of all recorded flights in the period, all legs. · Nov 3, 2024 → Jul 31, 2026
On time, leg by leg
Departures within 15 minutes of schedule; small figure = departures recorded.
Legs flown under this number
3| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| MDW BUF Chicago Midway International Airport – Buffalo Niagara International Airport | 752 | 13.2 min | 78.6% | 58 |
| LAS HOU Harry Reid International Airport – William P. Hobby Airport | 1,985 | 41.8 min | 37.5% | 50 |
| BUF MCO Buffalo Niagara International Airport – Orlando International Airport | 1,630 | 26.0 min | 64.7% | 35 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| November 2024 | 15 | 14 | 92.9% | 1 |
| December 2024 | 6 | 6 | 66.7% | 0 |
| January 2025 | 2 | 2 | 0.0% | 0 |
| February 2025 | 8 | 8 | 87.5% | 0 |
| March 2025 | 1 | 1 | 100.0% | 0 |
| June 2025 | 16 | 16 | 25.0% | 0 |
| July 2025 | 16 | 16 | 62.5% | 0 |
| August 2025 | 8 | 8 | 25.0% | 0 |
| September 2025 | 4 | 4 | 50.0% | 0 |
| November 2025 | 44 | 43 | 79.1% | 1 |
| December 2025 | 46 | 44 | 68.2% | 2 |
| January 2026 | 12 | 12 | 83.3% | 0 |
| February 2026 | 12 | 12 | 91.7% | 0 |
| March 2026 | 2 | 2 | 50.0% | 0 |
| June 2026 | 23 | 22 | 36.4% | 1 |
| July 2026 | 27 | 26 | 38.5% | 1 |