WN3860
WN3860 (Southwest Airlines) is a multi-stop service on 18 routes, busiest Philadelphia to Chicago. Of 389 departures recorded from October 2024 to July 2026, 74.1% left on time, according to the US BTS.
- On-time departures74.1%of 389 flights
- Average delay15.1 min
- July 202621▼ 4.5%vs July 2025
- Cancelled0.8%
- Legs flown under this number18
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 | 21 | 5 | ▼ 76.2% |
| February | 21 | – | – |
| March | 26 | 19 | ▼ 26.9% |
| April | 21 | 22 | ▲ 4.8% |
| May | 23 | 21 | ▼ 8.7% |
| June | 20 | 23 | ▲ 15.0% |
| July | 22 | 21 | ▼ 4.5% |
| August | 17 | – | – |
| September | 17 | – | – |
| October | 30 | – | in progress |
| November | 6 | – | – |
| December | 19 | – | – |
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 | 76.2% | 40.0% | ▼ 47.5% |
| February | 61.9% | – | – |
| March | 80.8% | 64.7% | ▼ 19.9% |
| April | 76.2% | 71.4% | ▼ 6.2% |
| May | 87.0% | 52.4% | ▼ 39.8% |
| June | 55.0% | 82.6% | ▲ 50.2% |
| July | 36.4% | 90.5% | ▲ 148.8% |
| August | 94.1% | – | – |
| September | 88.2% | – | – |
| October | 83.3% | – | in progress |
| November | 66.7% | – | – |
| December | 68.4% | – | – |
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 | 0 | – |
| February | 0 | – | – |
| March | 0 | 2 | – |
| April | 0 | 1 | – |
| 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 99.2% 386
- Cancelled 0.8% 3
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
5| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| PHX RNO Phoenix Sky Harbor International Airport – Reno Tahoe International Airport | 967 | 24.0 min | 57.1% | 42 |
| PHL MDW Philadelphia International Airport – Chicago Midway International Airport | 1,073 | 34.8 min | 42.9% | 42 |
| SNA SJC John Wayne Orange County International Airport – Mineta San Jose International Airport | 550 | 4.5 min | 90.2% | 41 |
| SJC LGB Mineta San Jose International Airport – Long Beach International Airport | 522 | 5.2 min | 82.5% | 40 |
| BNA DEN Nashville International Airport – Denver International Airport | 1,628 | 6.3 min | 93.8% | 32 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 17 | 17 | 88.2% | 0 |
| November 2024 | 14 | 14 | 85.7% | 0 |
| December 2024 | 4 | 4 | 100.0% | 0 |
| January 2025 | 21 | 21 | 76.2% | 0 |
| February 2025 | 21 | 21 | 61.9% | 0 |
| March 2025 | 26 | 26 | 80.8% | 0 |
| April 2025 | 21 | 21 | 76.2% | 0 |
| May 2025 | 23 | 23 | 87.0% | 0 |
| June 2025 | 20 | 20 | 55.0% | 0 |
| July 2025 | 22 | 22 | 36.4% | 0 |
| August 2025 | 17 | 17 | 94.1% | 0 |
| September 2025 | 17 | 17 | 88.2% | 0 |
| October 2025 | 30 | 30 | 83.3% | 0 |
| November 2025 | 6 | 6 | 66.7% | 0 |
| December 2025 | 19 | 19 | 68.4% | 0 |
| January 2026 | 5 | 5 | 40.0% | 0 |
| March 2026 | 19 | 17 | 64.7% | 2 |
| April 2026 | 22 | 21 | 71.4% | 1 |
| May 2026 | 21 | 21 | 52.4% | 0 |
| June 2026 | 23 | 23 | 82.6% | 0 |
| July 2026 | 21 | 21 | 90.5% | 0 |