WN4221
WN4221 (Southwest Airlines) is a multi-stop service on 18 routes, busiest Portland to Sacramento. Of 548 departures recorded from October 2024 to July 2026, 77.7% left on time, according to the US BTS.
- On-time departures77.7%of 548 flights
- Average delay10.5 min
- July 202626▼ 3.7%vs July 2025
- Cancelled1.6%
- Legs flown under this number18
Recorded departures by month
All legs under this number combined; see the leg table.
Months without data are left blank.
The most recent periods17 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 32 | 38 | ▲ 18.8% |
| February | 23 | 43 | ▲ 87.0% |
| March | 4 | 13 | ▲ 225.0% |
| April | 15 | 22 | ▲ 46.7% |
| May | 22 | 25 | ▲ 13.6% |
| June | 24 | 26 | ▲ 8.3% |
| July | 27 | 26 | ▼ 3.7% |
| August | 3 | – | – |
| September | – | – | – |
| October | – | – | in progress |
| November | 30 | – | – |
| December | 40 | – | – |
| Year to date (Jan–Jul) | 147 | 193 | ▲ 31.3% |
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 periods17 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 67.7% | 97.1% | ▲ 43.4% |
| February | 78.3% | 97.6% | ▲ 24.7% |
| March | 75.0% | 76.9% | ▲ 2.6% |
| April | 93.3% | 90.9% | ▼ 2.6% |
| May | 95.5% | 72.0% | ▼ 24.6% |
| June | 37.5% | 40.0% | ▲ 6.7% |
| July | 65.4% | 33.3% | ▼ 49.0% |
| August | 33.3% | – | – |
| September | – | – | – |
| October | – | – | in progress |
| November | 80.0% | – | – |
| December | 75.0% | – | – |
| Year-to-date average (Jan–Jul) | 73.2% | 72.6% | ▼ 0.9% |
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 periods17 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 1 | 3 | ▲ 200.0% |
| February | 0 | 1 | – |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 1 | – |
| July | 1 | 2 | ▲ 100.0% |
| August | 0 | – | – |
| September | – | – | – |
| October | – | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 2 | 7 | ▲ 250.0% |
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 98.4% 539
- Cancelled 1.6% 9
Share of all recorded flights in the period, all legs. · Oct 15, 2024 → Jul 31, 2026
On time, leg by leg
Departures within 15 minutes of schedule; small figure = departures recorded.
Legs flown under this number
7| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| PDX SMF Portland International Airport – Sacramento International Airport | 771 | 2.9 min | 89.2% | 84 |
| PHX ELP Phoenix Sky Harbor International Airport – El Paso International Airport | 557 | 19.9 min | 57.8% | 66 |
| SAN ELP San Diego International Airport – El Paso International Airport | 1,022 | 7.1 min | 82.8% | 59 |
| SJC AUS Mineta San Jose International Airport – Austin Bergstrom International Airport | 2,372 | 8.1 min | 79.6% | 49 |
| MDW RDU Chicago Midway International Airport – Raleigh-Durham International Airport | 1,016 | 50.2 min | 28.2% | 42 |
| ONT PHX Ontario International Airport – Phoenix Sky Harbor International Airport | 522 | 0.7 min | 94.9% | 39 |
| LAS ELP Harry Reid International Airport – El Paso International Airport | 938 | -3.5 min | 97.4% | 39 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 6 | 6 | 83.3% | 0 |
| November 2024 | 81 | 81 | 88.9% | 0 |
| December 2024 | 48 | 48 | 89.6% | 0 |
| January 2025 | 32 | 31 | 67.7% | 1 |
| February 2025 | 23 | 23 | 78.3% | 0 |
| March 2025 | 4 | 4 | 75.0% | 0 |
| April 2025 | 15 | 15 | 93.3% | 0 |
| May 2025 | 22 | 22 | 95.5% | 0 |
| June 2025 | 24 | 24 | 37.5% | 0 |
| July 2025 | 27 | 26 | 65.4% | 1 |
| August 2025 | 3 | 3 | 33.3% | 0 |
| November 2025 | 30 | 30 | 80.0% | 0 |
| December 2025 | 40 | 40 | 75.0% | 0 |
| January 2026 | 38 | 35 | 97.1% | 3 |
| February 2026 | 43 | 42 | 97.6% | 1 |
| March 2026 | 13 | 13 | 76.9% | 0 |
| April 2026 | 22 | 22 | 90.9% | 0 |
| May 2026 | 25 | 25 | 72.0% | 0 |
| June 2026 | 26 | 25 | 40.0% | 1 |
| July 2026 | 26 | 24 | 33.3% | 2 |