WN426
WN426 (Southwest Airlines) is a multi-stop service on 41 routes, busiest Boise to San Diego. Of 794 departures recorded from October 2024 to July 2026, 74.9% left on time, according to the US BTS.
- On-time departures74.9%of 794 flights
- Average delay12.6 min
- July 202645▲ 50.0%vs July 2025
- Cancelled1.1%
- Legs flown under this number41
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 | 39 | 30 | ▼ 23.1% |
| February | 35 | 28 | ▼ 20.0% |
| March | 27 | 54 | ▲ 100.0% |
| April | 29 | 59 | ▲ 103.4% |
| May | 31 | 60 | ▲ 93.5% |
| June | 30 | 49 | ▲ 63.3% |
| July | 30 | 45 | ▲ 50.0% |
| August | 27 | – | – |
| September | 26 | – | – |
| October | 31 | – | in progress |
| November | 30 | – | – |
| December | 30 | – | – |
| Year to date (Jan–Jul) | 221 | 325 | ▲ 47.1% |
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 | 79.0% | 93.1% | ▲ 17.9% |
| February | 77.1% | 100.0% | ▲ 29.6% |
| March | 77.8% | 81.1% | ▲ 4.3% |
| April | 93.1% | 62.7% | ▼ 32.6% |
| May | 66.7% | 45.0% | ▼ 32.5% |
| June | 80.0% | 63.3% | ▼ 20.9% |
| July | 76.7% | 80.0% | ▲ 4.3% |
| August | 74.1% | – | – |
| September | 56.0% | – | – |
| October | 74.2% | – | in progress |
| November | 75.0% | – | – |
| December | 73.3% | – | – |
| Year-to-date average (Jan–Jul) | 78.6% | 75.0% | ▼ 4.6% |
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 | 1 | 1 | 0.0% |
| February | 0 | 2 | – |
| March | 0 | 1 | – |
| April | 0 | 0 | – |
| May | 1 | 0 | ▼ 100.0% |
| June | 0 | 0 | – |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | 1 | – | – |
| October | 0 | – | in progress |
| November | 2 | – | – |
| 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 98.9% 785
- Cancelled 1.1% 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
88 of 8
| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| BOI SAN Boise Air Terminal/Gowen Field – San Diego International Airport | 1,207 | 8.7 min | 76.7% | 60 |
| BDL MCO Bradley International Airport – Orlando International Airport | 1,692 | 1.4 min | 96.4% | 58 |
| SNA SMF John Wayne Orange County International Airport – Sacramento International Airport | 650 | 12.6 min | 66.1% | 57 |
| SFO PHX San Francisco International Airport – Phoenix Sky Harbor International Airport | 1,047 | 10.7 min | 79.6% | 50 |
| AUS PHX Austin Bergstrom International Airport – Phoenix Sky Harbor International Airport | 1,401 | 19.7 min | 52.0% | 50 |
| PHX PDX Phoenix Sky Harbor International Airport – Portland International Airport | 1,625 | 25.0 min | 51.4% | 37 |
| TPA ATL Tampa International Airport – Hartsfield Jackson Atlanta International Airport | 655 | 28.7 min | 74.2% | 31 |
| LAS LGB Harry Reid International Airport – Long Beach International Airport | 372 | 10.2 min | 76.7% | 30 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 23 | 23 | 91.3% | 0 |
| November 2024 | 34 | 34 | 91.2% | 0 |
| December 2024 | 47 | 47 | 78.7% | 0 |
| January 2025 | 39 | 38 | 79.0% | 1 |
| February 2025 | 35 | 35 | 77.1% | 0 |
| March 2025 | 27 | 27 | 77.8% | 0 |
| April 2025 | 29 | 29 | 93.1% | 0 |
| May 2025 | 31 | 30 | 66.7% | 1 |
| June 2025 | 30 | 30 | 80.0% | 0 |
| July 2025 | 30 | 30 | 76.7% | 0 |
| August 2025 | 27 | 27 | 74.1% | 0 |
| September 2025 | 26 | 25 | 56.0% | 1 |
| October 2025 | 31 | 31 | 74.2% | 0 |
| November 2025 | 30 | 28 | 75.0% | 2 |
| December 2025 | 30 | 30 | 73.3% | 0 |
| January 2026 | 30 | 29 | 93.1% | 1 |
| February 2026 | 28 | 26 | 100.0% | 2 |
| March 2026 | 54 | 53 | 81.1% | 1 |
| April 2026 | 59 | 59 | 62.7% | 0 |
| May 2026 | 60 | 60 | 45.0% | 0 |
| June 2026 | 49 | 49 | 63.3% | 0 |
| July 2026 | 45 | 45 | 80.0% | 0 |