WN991
WN991 (Southwest Airlines) is a multi-stop service on 33 routes, busiest Salt Lake City to Long Beach. Of 687 departures recorded from October 2024 to July 2026, 76.2% left on time, according to the US BTS.
- On-time departures76.2%of 687 flights
- Average delay10.0 min
- July 202645▲ 50.0%vs July 2025
- Cancelled1.6%
- Legs flown under this number33
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 | 37 | 31 | ▼ 16.2% |
| February | 35 | 38 | ▲ 8.6% |
| March | 30 | 24 | ▼ 20.0% |
| April | 21 | 28 | ▲ 33.3% |
| May | 23 | 31 | ▲ 34.8% |
| June | 28 | 40 | ▲ 42.9% |
| July | 30 | 45 | ▲ 50.0% |
| August | 31 | – | – |
| September | 30 | – | – |
| October | 31 | – | in progress |
| November | 31 | – | – |
| December | 31 | – | – |
| Year to date (Jan–Jul) | 204 | 237 | ▲ 16.2% |
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 | 73.0% | 96.6% | ▲ 32.3% |
| February | 77.1% | 91.2% | ▲ 18.2% |
| March | 60.0% | 86.4% | ▲ 43.9% |
| April | 71.4% | 77.8% | ▲ 8.9% |
| May | 95.7% | 74.2% | ▼ 22.4% |
| June | 64.3% | 65.0% | ▲ 1.1% |
| July | 63.3% | 63.6% | ▲ 0.5% |
| August | 90.3% | – | – |
| September | 100.0% | – | – |
| October | 74.2% | – | in progress |
| November | 90.0% | – | – |
| December | 83.9% | – | – |
| Year-to-date average (Jan–Jul) | 72.1% | 79.2% | ▲ 9.9% |
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 | 2 | – |
| February | 0 | 4 | – |
| March | 0 | 2 | – |
| April | 0 | 1 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 0 | 1 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 1 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 0 | 10 |
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 98.4% 676
- Cancelled 1.6% 11
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 |
|---|---|---|---|---|
| SLC LGB Salt Lake City International Airport – Long Beach International Airport | 948 | 14.6 min | 72.1% | 104 |
| LAX MSY Los Angeles International Airport – Louis Armstrong New Orleans International Airport | 2,682 | 16.3 min | 63.3% | 60 |
| LAX MDW Los Angeles International Airport – Chicago Midway International Airport | 2,812 | 9.4 min | 77.6% | 58 |
| BWI PVD Baltimore/Washington International Thurgood Marshall Airport – Rhode Island T. F. Green International Airport | 526 | -2.5 min | 95.8% | 53 |
| MDW AUS Chicago Midway International Airport – Austin Bergstrom International Airport | 1,565 | 6.6 min | 82.2% | 46 |
| HOU STL William P. Hobby Airport – St. Louis Lambert International Airport | 1,108 | -1.8 min | 95.2% | 42 |
| HOU OKC William P. Hobby Airport – OKC Will Rogers World Airport | 675 | 5.9 min | 87.5% | 32 |
| OAK BUR Oakland San Francisco Bay Airport – Hollywood Burbank/Bob Hope Airport | 523 | 9.1 min | 74.2% | 31 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 28 | 28 | 60.7% | 0 |
| November 2024 | 32 | 32 | 78.1% | 0 |
| December 2024 | 32 | 32 | 53.1% | 0 |
| January 2025 | 37 | 37 | 73.0% | 0 |
| February 2025 | 35 | 35 | 77.1% | 0 |
| March 2025 | 30 | 30 | 60.0% | 0 |
| April 2025 | 21 | 21 | 71.4% | 0 |
| May 2025 | 23 | 23 | 95.7% | 0 |
| June 2025 | 28 | 28 | 64.3% | 0 |
| July 2025 | 30 | 30 | 63.3% | 0 |
| August 2025 | 31 | 31 | 90.3% | 0 |
| September 2025 | 30 | 30 | 100.0% | 0 |
| October 2025 | 31 | 31 | 74.2% | 0 |
| November 2025 | 31 | 30 | 90.0% | 1 |
| December 2025 | 31 | 31 | 83.9% | 0 |
| January 2026 | 31 | 29 | 96.6% | 2 |
| February 2026 | 38 | 34 | 91.2% | 4 |
| March 2026 | 24 | 22 | 86.4% | 2 |
| April 2026 | 28 | 27 | 77.8% | 1 |
| May 2026 | 31 | 31 | 74.2% | 0 |
| June 2026 | 40 | 40 | 65.0% | 0 |
| July 2026 | 45 | 44 | 63.6% | 1 |