WN3151
WN3151 (Southwest Airlines) is a multi-stop service on 20 routes, busiest Denver to Colorado Springs. Of 648 departures recorded from October 2024 to July 2026, 74.3% left on time, according to the US BTS.
- On-time departures74.3%of 648 flights
- Average delay14.2 min
- July 202648▲ 242.9%vs July 2025
- Cancelled1.4%
- Legs flown under this number20
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 | 30 | ▼ 3.2% |
| February | 28 | 28 | 0.0% |
| March | 31 | 31 | 0.0% |
| April | 38 | 27 | ▼ 28.9% |
| May | 39 | 25 | ▼ 35.9% |
| June | 18 | 46 | ▲ 155.6% |
| July | 14 | 48 | ▲ 242.9% |
| August | 29 | – | – |
| September | 30 | – | – |
| October | 18 | – | in progress |
| November | 36 | – | – |
| December | 36 | – | – |
| Year to date (Jan–Jul) | 199 | 235 | ▲ 18.1% |
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 | 74.2% | 93.3% | ▲ 25.8% |
| February | 67.9% | 96.4% | ▲ 42.1% |
| March | 66.7% | 83.3% | ▲ 25.0% |
| April | 86.8% | 76.9% | ▼ 11.4% |
| May | 61.5% | 44.0% | ▼ 28.5% |
| June | 88.9% | 76.1% | ▼ 14.4% |
| July | 38.5% | 87.0% | ▲ 126.1% |
| August | 34.5% | – | – |
| September | 56.7% | – | – |
| October | 77.8% | – | in progress |
| November | 80.0% | – | – |
| December | 77.8% | – | – |
| Year-to-date average (Jan–Jul) | 69.2% | 79.6% | ▲ 15.0% |
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 | 0 | 0 | – |
| February | 0 | 0 | – |
| March | 1 | 1 | 0.0% |
| April | 0 | 1 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 1 | 2 | ▲ 100.0% |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 1 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 2 | 4 | ▲ 100.0% |
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 98.6% 639
- Cancelled 1.4% 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 |
|---|---|---|---|---|
| DEN COS Denver International Airport – City of Colorado Springs Municipal Airport | 117 | 9.9 min | 75.8% | 122 |
| PHX HOU Phoenix Sky Harbor International Airport – William P. Hobby Airport | 1,638 | 1.8 min | 96.6% | 58 |
| LAX DEN Los Angeles International Airport – Denver International Airport | 1,385 | 33.5 min | 46.6% | 58 |
| SJC ONT Mineta San Jose International Airport – Ontario International Airport | 536 | 8.8 min | 83.9% | 57 |
| OMA PHX Eppley Airfield – Phoenix Sky Harbor International Airport | 1,667 | 8.3 min | 79.0% | 57 |
| MDW HOU Chicago Midway International Airport – William P. Hobby Airport | 1,510 | 25.0 min | 58.3% | 49 |
| IND BWI Indianapolis International Airport – Baltimore/Washington International Thurgood Marshall Airport | 828 | 9.4 min | 75.6% | 46 |
| PIT MCO Pittsburgh International Airport – Orlando International Airport | 1,345 | 16.6 min | 68.8% | 33 |
| DCA STL Ronald Reagan Washington National Airport – St. Louis Lambert International Airport | 1,154 | 13.1 min | 84.4% | 33 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 6 | 6 | 100.0% | 0 |
| November 2024 | 28 | 26 | 80.8% | 2 |
| December 2024 | 31 | 31 | 80.7% | 0 |
| January 2025 | 31 | 31 | 74.2% | 0 |
| February 2025 | 28 | 28 | 67.9% | 0 |
| March 2025 | 31 | 30 | 66.7% | 1 |
| April 2025 | 38 | 38 | 86.8% | 0 |
| May 2025 | 39 | 39 | 61.5% | 0 |
| June 2025 | 18 | 18 | 88.9% | 0 |
| July 2025 | 14 | 13 | 38.5% | 1 |
| August 2025 | 29 | 29 | 34.5% | 0 |
| September 2025 | 30 | 30 | 56.7% | 0 |
| October 2025 | 18 | 18 | 77.8% | 0 |
| November 2025 | 36 | 35 | 80.0% | 1 |
| December 2025 | 36 | 36 | 77.8% | 0 |
| January 2026 | 30 | 30 | 93.3% | 0 |
| February 2026 | 28 | 28 | 96.4% | 0 |
| March 2026 | 31 | 30 | 83.3% | 1 |
| April 2026 | 27 | 26 | 76.9% | 1 |
| May 2026 | 25 | 25 | 44.0% | 0 |
| June 2026 | 46 | 46 | 76.1% | 0 |
| July 2026 | 48 | 46 | 87.0% | 2 |