WN787
WN787 (Southwest Airlines) is a multi-stop service on 26 routes, busiest Boston to Chicago. Of 670 departures recorded from October 2024 to July 2026, 78.8% left on time, according to the US BTS.
- On-time departures78.8%of 670 flights
- Average delay8.7 min
- July 202631▲ 34.8%vs July 2025
- Cancelled1.3%
- Legs flown under this number26
according to the US BTS · Oct 12, 2024 → Jul 31, 2026 domestic flights only
Recorded departures by month
Partial coverage: domestic flights only · 22 of 22 periods have data
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 | 31 | 27 | ▼ 12.9% |
| February | 28 | 37 | ▲ 32.1% |
| March | 23 | 36 | ▲ 56.5% |
| April | 28 | 28 | 0.0% |
| May | 31 | 27 | ▼ 12.9% |
| June | 22 | 30 | ▲ 36.4% |
| July | 23 | 31 | ▲ 34.8% |
| August | 45 | – | – |
| September | 48 | – | – |
| October | 28 | – | in progress |
| November | 30 | – | – |
| December | 29 | – | – |
| Year to date (Jan–Jul) | 186 | 216 | ▲ 16.1% |
according to the US BTS · October 2024 → July 2026
On-time departures by month
Partial coverage: domestic flights only · 22 of 22 periods have data
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 | 93.3% | 92.6% | ▼ 0.8% |
| February | 92.9% | 78.4% | ▼ 15.6% |
| March | 95.7% | 67.7% | ▼ 29.3% |
| April | 92.9% | 60.7% | ▼ 34.6% |
| May | 71.0% | 48.2% | ▼ 32.2% |
| June | 95.5% | 24.1% | ▼ 74.7% |
| July | 100.0% | 19.4% | ▼ 80.7% |
| August | 88.9% | – | – |
| September | 91.7% | – | – |
| October | 78.6% | – | in progress |
| November | 85.2% | – | – |
| December | 93.1% | – | – |
| Year-to-date average (Jan–Jul) | 91.6% | 55.9% | ▼ 39.0% |
according to the US BTS · October 2024 → July 2026
Average departure delay by month
Partial coverage: domestic flights only · 22 of 22 periods have data
according to the US BTS · October 2024 → July 2026
Cancelled departures by month
Partial coverage: domestic flights only · 22 of 22 periods have data
The most recent periods19 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 1 | 0 | ▼ 100.0% |
| February | 0 | 0 | – |
| March | 0 | 2 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 1 | – |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 3 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 1 | 3 | ▲ 200.0% |
according to the US BTS · October 2024 → July 2026
This is not a forecast
This is a historical record of departures already flown, not a forecast for your flight.
This number flies several legs
Several legs: the headline figure averages all of them. See the leg table.
Cancellation share
- Not cancelled 98.7% 661
- Cancelled 1.3% 9
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
99 of 9
| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| BOS MDW Boston Logan International Airport – Chicago Midway International Airport | 1,381 | 2.0 min | 92.4% | 122 |
| DEN PHX Denver International Airport – Phoenix Sky Harbor International Airport | 968 | 11.2 min | 82.8% | 58 |
| BNA MCO Nashville International Airport – Orlando International Airport | 993 | 38.1 min | 22.8% | 58 |
| BUR SJC Hollywood Burbank/Bob Hope Airport – Mineta San Jose International Airport | 477 | 1.0 min | 88.5% | 53 |
| MEM BNA Frederick W. Smith International Airport – Nashville International Airport | 322 | -0.1 min | 90.0% | 50 |
| VPS BWI Destin-Fort Walton Beach Airport – Baltimore/Washington International Thurgood Marshall Airport | 1,318 | -5.2 min | 97.7% | 43 |
| PHX OAK Phoenix Sky Harbor International Airport – Oakland San Francisco Bay Airport | 1,039 | 6.0 min | 90.0% | 42 |
| BNA SAT Nashville International Airport – San Antonio International Airport | 1,322 | 20.6 min | 42.9% | 42 |
| ONT DEN Ontario International Airport – Denver International Airport | 1,316 | 18.6 min | 56.3% | 33 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 26 | 26 | 84.6% | 0 |
| November 2024 | 32 | 32 | 93.8% | 0 |
| December 2024 | 30 | 28 | 89.3% | 2 |
| January 2025 | 31 | 30 | 93.3% | 1 |
| February 2025 | 28 | 28 | 92.9% | 0 |
| March 2025 | 23 | 23 | 95.7% | 0 |
| April 2025 | 28 | 28 | 92.9% | 0 |
| May 2025 | 31 | 31 | 71.0% | 0 |
| June 2025 | 22 | 22 | 95.5% | 0 |
| July 2025 | 23 | 23 | 100.0% | 0 |
| August 2025 | 45 | 45 | 88.9% | 0 |
| September 2025 | 48 | 48 | 91.7% | 0 |
| October 2025 | 28 | 28 | 78.6% | 0 |
| November 2025 | 30 | 27 | 85.2% | 3 |
| December 2025 | 29 | 29 | 93.1% | 0 |
| January 2026 | 27 | 27 | 92.6% | 0 |
| February 2026 | 37 | 37 | 78.4% | 0 |
| March 2026 | 36 | 34 | 67.7% | 2 |
| April 2026 | 28 | 28 | 60.7% | 0 |
| May 2026 | 27 | 27 | 48.2% | 0 |
| June 2026 | 30 | 29 | 24.1% | 1 |
| July 2026 | 31 | 31 | 19.4% | 0 |