WN3378
WN3378 (Southwest Airlines) is a multi-stop service on 23 routes, busiest Chicago to Seattle. Of 454 departures recorded from October 2024 to July 2026, 76.4% left on time, according to the US BTS.
- On-time departures76.4%of 454 flights
- Average delay12.2 min
- July 202621▲ 425.0%vs July 2025
- Cancelled0.0%
- Legs flown under this number23
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 | 45 | – | – |
| February | 40 | 3 | ▼ 92.5% |
| March | 26 | 27 | ▲ 3.8% |
| April | 46 | 30 | ▼ 34.8% |
| May | 59 | 31 | ▼ 47.5% |
| June | 10 | 23 | ▲ 130.0% |
| July | 4 | 21 | ▲ 425.0% |
| August | 5 | – | – |
| September | 4 | – | – |
| October | 9 | – | in progress |
| November | 13 | – | – |
| December | 15 | – | – |
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 | 93.3% | – | – |
| February | 90.0% | 100.0% | ▲ 11.1% |
| March | 73.1% | 33.3% | ▼ 54.4% |
| April | 65.2% | 70.0% | ▲ 7.3% |
| May | 69.5% | 54.8% | ▼ 21.1% |
| June | 100.0% | 78.3% | ▼ 21.7% |
| July | 75.0% | 100.0% | ▲ 33.3% |
| August | 100.0% | – | – |
| September | 75.0% | – | – |
| October | 55.6% | – | in progress |
| November | 84.6% | – | – |
| December | 86.7% | – | – |
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 | – | – |
| February | 0 | 0 | – |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 0 | 0 | – |
| August | 0 | – | – |
| 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 100.0% 454
- Cancelled 0.0% 0
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
6| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| OAK LGB Oakland San Francisco Bay Airport – Long Beach International Airport | 569 | 11.8 min | 70.7% | 58 |
| MDW SEA Chicago Midway International Airport – Seattle–Tacoma International Airport | 2,782 | 22.5 min | 58.6% | 58 |
| MDW PHL Chicago Midway International Airport – Philadelphia International Airport | 1,073 | 1.2 min | 89.7% | 58 |
| PIT MDW Pittsburgh International Airport – Chicago Midway International Airport | 646 | 11.6 min | 92.7% | 41 |
| PHL MCO Philadelphia International Airport – Orlando International Airport | 1,389 | 2.7 min | 91.7% | 36 |
| HOU DEN William P. Hobby Airport – Denver International Airport | 1,422 | 34.9 min | 42.4% | 33 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 35 | 35 | 91.4% | 0 |
| November 2024 | 5 | 5 | 100.0% | 0 |
| December 2024 | 3 | 3 | 100.0% | 0 |
| January 2025 | 45 | 45 | 93.3% | 0 |
| February 2025 | 40 | 40 | 90.0% | 0 |
| March 2025 | 26 | 26 | 73.1% | 0 |
| April 2025 | 46 | 46 | 65.2% | 0 |
| May 2025 | 59 | 59 | 69.5% | 0 |
| June 2025 | 10 | 10 | 100.0% | 0 |
| July 2025 | 4 | 4 | 75.0% | 0 |
| August 2025 | 5 | 5 | 100.0% | 0 |
| September 2025 | 4 | 4 | 75.0% | 0 |
| October 2025 | 9 | 9 | 55.6% | 0 |
| November 2025 | 13 | 13 | 84.6% | 0 |
| December 2025 | 15 | 15 | 86.7% | 0 |
| February 2026 | 3 | 3 | 100.0% | 0 |
| March 2026 | 27 | 27 | 33.3% | 0 |
| April 2026 | 30 | 30 | 70.0% | 0 |
| May 2026 | 31 | 31 | 54.8% | 0 |
| June 2026 | 23 | 23 | 78.3% | 0 |
| July 2026 | 21 | 21 | 100.0% | 0 |