WN2551
WN2551 (Southwest Airlines) is a multi-stop service on 31 routes, busiest Denver to Indianapolis. Of 523 departures recorded from October 2024 to July 2026, 73.3% left on time, according to the US BTS.
- On-time departures73.3%of 523 flights
- Average delay14.8 min
- July 20265▼ 85.3%vs July 2025
- Cancelled0.6%
- Legs flown under this number31
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 | 5 | 13 | ▲ 160.0% |
| February | 8 | 12 | ▲ 50.0% |
| March | 43 | 35 | ▼ 18.6% |
| April | 34 | 34 | 0.0% |
| May | 31 | 34 | ▲ 9.7% |
| June | 34 | 7 | ▼ 79.4% |
| July | 34 | 5 | ▼ 85.3% |
| August | 16 | – | – |
| September | 13 | – | – |
| October | 35 | – | in progress |
| November | 27 | – | – |
| December | 29 | – | – |
| Year to date (Jan–Jul) | 189 | 140 | ▼ 25.9% |
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 | 40.0% | 75.0% | ▲ 87.5% |
| February | 87.5% | 66.7% | ▼ 23.8% |
| March | 83.7% | 88.6% | ▲ 5.8% |
| April | 69.7% | 79.4% | ▲ 13.9% |
| May | 48.4% | 88.2% | ▲ 82.4% |
| June | 70.6% | 100.0% | ▲ 41.7% |
| July | 91.2% | 20.0% | ▼ 78.1% |
| August | 75.0% | – | – |
| September | 61.5% | – | – |
| October | 48.6% | – | in progress |
| November | 76.9% | – | – |
| December | 48.3% | – | – |
| Year-to-date average (Jan–Jul) | 70.2% | 74.0% | ▲ 5.5% |
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 | 1 | – |
| February | 0 | 0 | – |
| March | 0 | 0 | – |
| April | 1 | 0 | ▼ 100.0% |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 1 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 1 | 1 | 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 99.4% 520
- Cancelled 0.6% 3
Share of all recorded flights in the period, all legs. · Oct 13, 2024 → Jul 26, 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 |
|---|---|---|---|---|
| DEN IND Denver International Airport – Indianapolis International Airport | 1,568 | 9.2 min | 86.7% | 60 |
| PHL MDW Philadelphia International Airport – Chicago Midway International Airport | 1,073 | 18.5 min | 59.7% | 58 |
| LGB DEN Long Beach International Airport – Denver International Airport | 1,373 | 45.7 min | 52.6% | 58 |
| CHS BNA Charleston International Airport – Nashville International Airport | 706 | 4.1 min | 81.8% | 33 |
| BHM MDW Birmingham-Shuttlesworth International Airport – Chicago Midway International Airport | 919 | 19.5 min | 71.0% | 31 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 17 | 17 | 94.1% | 0 |
| November 2024 | 34 | 34 | 82.4% | 0 |
| December 2024 | 23 | 23 | 65.2% | 0 |
| January 2025 | 5 | 5 | 40.0% | 0 |
| February 2025 | 8 | 8 | 87.5% | 0 |
| March 2025 | 43 | 43 | 83.7% | 0 |
| April 2025 | 34 | 33 | 69.7% | 1 |
| May 2025 | 31 | 31 | 48.4% | 0 |
| June 2025 | 34 | 34 | 70.6% | 0 |
| July 2025 | 34 | 34 | 91.2% | 0 |
| August 2025 | 16 | 16 | 75.0% | 0 |
| September 2025 | 13 | 13 | 61.5% | 0 |
| October 2025 | 35 | 35 | 48.6% | 0 |
| November 2025 | 27 | 26 | 76.9% | 1 |
| December 2025 | 29 | 29 | 48.3% | 0 |
| January 2026 | 13 | 12 | 75.0% | 1 |
| February 2026 | 12 | 12 | 66.7% | 0 |
| March 2026 | 35 | 35 | 88.6% | 0 |
| April 2026 | 34 | 34 | 79.4% | 0 |
| May 2026 | 34 | 34 | 88.2% | 0 |
| June 2026 | 7 | 7 | 100.0% | 0 |
| July 2026 | 5 | 5 | 20.0% | 0 |