WN3121
WN3121 (Southwest Airlines) is a multi-stop service on 19 routes, busiest Houston to Las Vegas. Of 549 departures recorded from October 2024 to July 2026, 75.0% left on time, according to the US BTS.
- On-time departures75.0%of 549 flights
- Average delay11.3 min
- July 202631▼ 22.5%vs July 2025
- Cancelled0.4%
- Legs flown under this number19
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 | 14 | 28 | ▲ 100.0% |
| February | 9 | 18 | ▲ 100.0% |
| March | 15 | 30 | ▲ 100.0% |
| April | 4 | 27 | ▲ 575.0% |
| May | – | 26 | – |
| June | 34 | 30 | ▼ 11.8% |
| July | 40 | 31 | ▼ 22.5% |
| August | 56 | – | – |
| September | 59 | – | – |
| October | 30 | – | in progress |
| November | 25 | – | – |
| December | 20 | – | – |
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 | 50.0% | 78.6% | ▲ 57.1% |
| February | 66.7% | 70.6% | ▲ 5.9% |
| March | 100.0% | 100.0% | 0.0% |
| April | 75.0% | 96.3% | ▲ 28.4% |
| May | – | 92.3% | – |
| June | 41.2% | 96.7% | ▲ 134.7% |
| July | 47.5% | 96.8% | ▲ 103.7% |
| August | 62.5% | – | – |
| September | 60.3% | – | – |
| October | 53.3% | – | in progress |
| November | 88.0% | – | – |
| December | 95.0% | – | – |
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 | 1 | – |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | – | 0 | – |
| June | 0 | 0 | – |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | 1 | – | – |
| 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 99.6% 547
- Cancelled 0.4% 2
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
9| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| HOU LAS William P. Hobby Airport – Harry Reid International Airport | 1,985 | 9.3 min | 76.8% | 69 |
| OKC MDW OKC Will Rogers World Airport – Chicago Midway International Airport | 1,111 | 0.1 min | 96.6% | 58 |
| DAL PHX Dallas Love Field – Phoenix Sky Harbor International Airport | 1,412 | 25.9 min | 50.0% | 57 |
| MCO HOU Orlando International Airport – William P. Hobby Airport | 1,364 | 1.1 min | 94.0% | 50 |
| MDW TPA Chicago Midway International Airport – Tampa International Airport | 1,607 | 6.4 min | 78.3% | 47 |
| LAS BNA Harry Reid International Airport – Nashville International Airport | 2,549 | 2.2 min | 89.1% | 46 |
| PDX DEN Portland International Airport – Denver International Airport | 1,592 | 33.2 min | 32.6% | 43 |
| ELP SAN El Paso International Airport – San Diego International Airport | 1,022 | -4.5 min | 100.0% | 33 |
| IND DEN Indianapolis International Airport – Denver International Airport | 1,568 | 22.0 min | 53.3% | 30 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 3 | 3 | 100.0% | 0 |
| November 2024 | 24 | 24 | 91.7% | 0 |
| December 2024 | 26 | 26 | 80.8% | 0 |
| January 2025 | 14 | 14 | 50.0% | 0 |
| February 2025 | 9 | 9 | 66.7% | 0 |
| March 2025 | 15 | 15 | 100.0% | 0 |
| April 2025 | 4 | 4 | 75.0% | 0 |
| June 2025 | 34 | 34 | 41.2% | 0 |
| July 2025 | 40 | 40 | 47.5% | 0 |
| August 2025 | 56 | 56 | 62.5% | 0 |
| September 2025 | 59 | 58 | 60.3% | 1 |
| October 2025 | 30 | 30 | 53.3% | 0 |
| November 2025 | 25 | 25 | 88.0% | 0 |
| December 2025 | 20 | 20 | 95.0% | 0 |
| January 2026 | 28 | 28 | 78.6% | 0 |
| February 2026 | 18 | 17 | 70.6% | 1 |
| March 2026 | 30 | 30 | 100.0% | 0 |
| April 2026 | 27 | 27 | 96.3% | 0 |
| May 2026 | 26 | 26 | 92.3% | 0 |
| June 2026 | 30 | 30 | 96.7% | 0 |
| July 2026 | 31 | 31 | 96.8% | 0 |