WN2666
WN2666 (Southwest Airlines) is a multi-stop service on 28 routes, busiest Chicago to Boston. Of 635 departures recorded from October 2024 to July 2026, 72.8% left on time, according to the US BTS.
- On-time departures72.8%of 635 flights
- Average delay14.4 min
- July 202631▲ 0.0%vs July 2025
- Cancelled0.0%
- Legs flown under this number28
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 | 33 | 29 | ▼ 12.1% |
| February | 26 | 28 | ▲ 7.7% |
| March | 52 | 38 | ▼ 26.9% |
| April | 36 | 27 | ▼ 25.0% |
| May | 31 | 26 | ▼ 16.1% |
| June | 30 | 30 | 0.0% |
| July | 31 | 31 | 0.0% |
| August | 31 | – | – |
| September | 30 | – | – |
| October | 18 | – | in progress |
| November | 7 | – | – |
| December | 11 | – | – |
| Year to date (Jan–Jul) | 239 | 209 | ▼ 12.6% |
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 | 90.9% | 65.5% | ▼ 27.9% |
| February | 84.6% | 78.6% | ▼ 7.1% |
| March | 80.8% | 42.1% | ▼ 47.9% |
| April | 86.1% | 74.1% | ▼ 14.0% |
| May | 54.8% | 84.6% | ▲ 54.3% |
| June | 73.3% | 43.3% | ▼ 40.9% |
| July | 58.1% | 48.4% | ▼ 16.7% |
| August | 83.9% | – | – |
| September | 80.0% | – | – |
| October | 88.9% | – | in progress |
| November | 85.7% | – | – |
| December | 36.4% | – | – |
| Year-to-date average (Jan–Jul) | 75.5% | 62.4% | ▼ 17.4% |
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 | 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 | – | – |
| Year to date (Jan–Jul) | 0 | 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% 635
- 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
7| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| MDW BOS Chicago Midway International Airport – Boston Logan International Airport | 1,381 | 3.7 min | 91.6% | 107 |
| MDW HOU Chicago Midway International Airport – William P. Hobby Airport | 1,510 | 12.2 min | 67.2% | 58 |
| MDW CLE Chicago Midway International Airport – Cleveland Hopkins International Airport | 493 | 6.2 min | 75.9% | 58 |
| MCO MKE Orlando International Airport – General Mitchell International Airport | 1,719 | 35.0 min | 42.1% | 57 |
| SLC MDW Salt Lake City International Airport – Chicago Midway International Airport | 2,021 | 6.4 min | 86.0% | 50 |
| LAS MSY Harry Reid International Airport – Louis Armstrong New Orleans International Airport | 2,409 | 8.5 min | 82.0% | 50 |
| DAL ELP Dallas Love Field – El Paso International Airport | 902 | 34.3 min | 46.9% | 32 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 20 | 20 | 85.0% | 0 |
| November 2024 | 31 | 31 | 100.0% | 0 |
| December 2024 | 39 | 39 | 74.4% | 0 |
| January 2025 | 33 | 33 | 90.9% | 0 |
| February 2025 | 26 | 26 | 84.6% | 0 |
| March 2025 | 52 | 52 | 80.8% | 0 |
| April 2025 | 36 | 36 | 86.1% | 0 |
| May 2025 | 31 | 31 | 54.8% | 0 |
| June 2025 | 30 | 30 | 73.3% | 0 |
| July 2025 | 31 | 31 | 58.1% | 0 |
| August 2025 | 31 | 31 | 83.9% | 0 |
| September 2025 | 30 | 30 | 80.0% | 0 |
| October 2025 | 18 | 18 | 88.9% | 0 |
| November 2025 | 7 | 7 | 85.7% | 0 |
| December 2025 | 11 | 11 | 36.4% | 0 |
| January 2026 | 29 | 29 | 65.5% | 0 |
| February 2026 | 28 | 28 | 78.6% | 0 |
| March 2026 | 38 | 38 | 42.1% | 0 |
| April 2026 | 27 | 27 | 74.1% | 0 |
| May 2026 | 26 | 26 | 84.6% | 0 |
| June 2026 | 30 | 30 | 43.3% | 0 |
| July 2026 | 31 | 31 | 48.4% | 0 |