WN121
WN121 (Southwest Airlines) is a multi-stop service on 52 routes, busiest Phoenix to San Diego. Of 772 departures recorded from October 2024 to July 2026, 79.0% left on time, according to the US BTS.
- On-time departures79.0%of 772 flights
- Average delay9.2 min
- July 202658▲ 152.2%vs July 2025
- Cancelled0.8%
- Legs flown under this number52
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 | 55 | 32 | ▼ 41.8% |
| February | 67 | 35 | ▼ 47.8% |
| March | 28 | 33 | ▲ 17.9% |
| April | 38 | 31 | ▼ 18.4% |
| May | 43 | 33 | ▼ 23.3% |
| June | 25 | 55 | ▲ 120.0% |
| July | 23 | 58 | ▲ 152.2% |
| August | 3 | – | – |
| September | – | – | – |
| October | 30 | – | in progress |
| November | 32 | – | – |
| December | 33 | – | – |
| Year to date (Jan–Jul) | 279 | 277 | ▼ 0.7% |
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 | 83.0% | 87.5% | ▲ 5.4% |
| February | 89.4% | 97.1% | ▲ 8.7% |
| March | 92.9% | 90.9% | ▼ 2.1% |
| April | 86.8% | 77.4% | ▼ 10.8% |
| May | 87.8% | 60.6% | ▼ 31.0% |
| June | 76.0% | 52.7% | ▼ 30.6% |
| July | 78.3% | 65.5% | ▼ 16.3% |
| August | 100.0% | – | – |
| September | – | – | – |
| October | 80.0% | – | in progress |
| November | 59.4% | – | – |
| December | 54.6% | – | – |
| Year-to-date average (Jan–Jul) | 84.9% | 76.0% | ▼ 10.5% |
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 | 2 | 0 | ▼ 100.0% |
| February | 1 | 0 | ▼ 100.0% |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | 2 | 0 | ▼ 100.0% |
| June | 0 | 0 | – |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | – | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 5 | 0 | ▼ 100.0% |
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 99.2% 766
- Cancelled 0.8% 6
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
8| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| PHX SAN Phoenix Sky Harbor International Airport – San Diego International Airport | 489 | 0.7 min | 92.3% | 93 |
| PHX BOI Phoenix Sky Harbor International Airport – Boise Air Terminal/Gowen Field | 1,184 | 18.3 min | 50.9% | 59 |
| SAN OAK San Diego International Airport – Oakland San Francisco Bay Airport | 718 | 3.3 min | 91.2% | 58 |
| ABQ HOU Albuquerque International Sunport – William P. Hobby Airport | 1,221 | -0.3 min | 96.6% | 58 |
| MCI DAL Kansas City International Airport – Dallas Love Field | 743 | -1.8 min | 93.8% | 49 |
| PHX OKC Phoenix Sky Harbor International Airport – OKC Will Rogers World Airport | 1,338 | 8.0 min | 74.4% | 43 |
| LAS LAX Harry Reid International Airport – Los Angeles International Airport | 380 | 17.6 min | 66.7% | 42 |
| IND MCO Indianapolis International Airport – Orlando International Airport | 1,336 | 43.9 min | 33.3% | 42 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 33 | 33 | 93.9% | 0 |
| November 2024 | 48 | 48 | 95.8% | 0 |
| December 2024 | 37 | 36 | 72.2% | 1 |
| January 2025 | 55 | 53 | 83.0% | 2 |
| February 2025 | 67 | 66 | 89.4% | 1 |
| March 2025 | 28 | 28 | 92.9% | 0 |
| April 2025 | 38 | 38 | 86.8% | 0 |
| May 2025 | 43 | 41 | 87.8% | 2 |
| June 2025 | 25 | 25 | 76.0% | 0 |
| July 2025 | 23 | 23 | 78.3% | 0 |
| August 2025 | 3 | 3 | 100.0% | 0 |
| October 2025 | 30 | 30 | 80.0% | 0 |
| November 2025 | 32 | 32 | 59.4% | 0 |
| December 2025 | 33 | 33 | 54.6% | 0 |
| January 2026 | 32 | 32 | 87.5% | 0 |
| February 2026 | 35 | 35 | 97.1% | 0 |
| March 2026 | 33 | 33 | 90.9% | 0 |
| April 2026 | 31 | 31 | 77.4% | 0 |
| May 2026 | 33 | 33 | 60.6% | 0 |
| June 2026 | 55 | 55 | 52.7% | 0 |
| July 2026 | 58 | 58 | 65.5% | 0 |