WN508
WN508 (Southwest Airlines) is a multi-stop service on 35 routes, busiest Islip to Baltimore. Of 733 departures recorded from October 2024 to July 2026, 81.6% left on time, according to the US BTS.
- On-time departures81.6%of 733 flights
- Average delay9.3 min
- July 202631▼ 20.5%vs July 2025
- Cancelled0.4%
- Legs flown under this number35
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 | 31 | 33 | ▲ 6.5% |
| February | 28 | 28 | 0.0% |
| March | 35 | 35 | 0.0% |
| April | 28 | 34 | ▲ 21.4% |
| May | 27 | 36 | ▲ 33.3% |
| June | 37 | 30 | ▼ 18.9% |
| July | 39 | 31 | ▼ 20.5% |
| August | 32 | – | – |
| September | 30 | – | – |
| October | 35 | – | in progress |
| November | 50 | – | – |
| December | 47 | – | – |
| Year to date (Jan–Jul) | 225 | 227 | ▲ 0.9% |
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 | 90.0% | 81.8% | ▼ 9.1% |
| February | 100.0% | 75.0% | ▼ 25.0% |
| March | 74.3% | 34.3% | ▼ 53.8% |
| April | 82.1% | 79.4% | ▼ 3.3% |
| May | 88.9% | 80.6% | ▼ 9.4% |
| June | 86.5% | 90.0% | ▲ 4.1% |
| July | 79.5% | 96.8% | ▲ 21.7% |
| August | 81.3% | – | – |
| September | 90.0% | – | – |
| October | 65.7% | – | in progress |
| November | 81.3% | – | – |
| December | 78.7% | – | – |
| Year-to-date average (Jan–Jul) | 85.9% | 76.8% | ▼ 10.6% |
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 | 0 | ▼ 100.0% |
| February | 0 | 0 | – |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 2 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 1 | 0 | ▼ 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 99.6% 730
- Cancelled 0.4% 3
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
99 of 9
| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| ISP BWI Long Island MacArthur Airport – Baltimore/Washington International Thurgood Marshall Airport | 353 | -0.1 min | 95.0% | 122 |
| MSY MDW Louis Armstrong New Orleans International Airport – Chicago Midway International Airport | 1,331 | 4.1 min | 81.0% | 58 |
| HNL OGG Daniel K. Inouye International Airport – Kahului International Airport | 162 | -0.0 min | 93.0% | 57 |
| ORF MCO Norfolk International Airport – Orlando International Airport | 1,055 | 3.0 min | 96.0% | 50 |
| LAX MDW Los Angeles International Airport – Chicago Midway International Airport | 2,812 | 5.0 min | 90.0% | 50 |
| MSY BNA Louis Armstrong New Orleans International Airport – Nashville International Airport | 759 | 4.5 min | 88.4% | 43 |
| DAL LAS Dallas Love Field – Harry Reid International Airport | 1,714 | 20.2 min | 70.7% | 42 |
| PHX BUR Phoenix Sky Harbor International Airport – Hollywood Burbank/Bob Hope Airport | 593 | 23.7 min | 66.7% | 33 |
| OAK DEN Oakland San Francisco Bay Airport – Denver International Airport | 1,537 | 35.2 min | 33.3% | 33 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 26 | 26 | 88.5% | 0 |
| November 2024 | 30 | 30 | 93.3% | 0 |
| December 2024 | 31 | 31 | 93.6% | 0 |
| January 2025 | 31 | 30 | 90.0% | 1 |
| February 2025 | 28 | 28 | 100.0% | 0 |
| March 2025 | 35 | 35 | 74.3% | 0 |
| April 2025 | 28 | 28 | 82.1% | 0 |
| May 2025 | 27 | 27 | 88.9% | 0 |
| June 2025 | 37 | 37 | 86.5% | 0 |
| July 2025 | 39 | 39 | 79.5% | 0 |
| August 2025 | 32 | 32 | 81.3% | 0 |
| September 2025 | 30 | 30 | 90.0% | 0 |
| October 2025 | 35 | 35 | 65.7% | 0 |
| November 2025 | 50 | 48 | 81.3% | 2 |
| December 2025 | 47 | 47 | 78.7% | 0 |
| January 2026 | 33 | 33 | 81.8% | 0 |
| February 2026 | 28 | 28 | 75.0% | 0 |
| March 2026 | 35 | 35 | 34.3% | 0 |
| April 2026 | 34 | 34 | 79.4% | 0 |
| May 2026 | 36 | 36 | 80.6% | 0 |
| June 2026 | 30 | 30 | 90.0% | 0 |
| July 2026 | 31 | 31 | 96.8% | 0 |