WN3815
WN3815 (Southwest Airlines) is a multi-stop service on 22 routes, busiest New York to Houston. Of 575 departures recorded from October 2024 to July 2026, 77.5% left on time, according to the US BTS.
- On-time departures77.5%of 575 flights
- Average delay11.0 min
- July 202626▲ 550.0%vs July 2025
- Cancelled1.7%
- Legs flown under this number22
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 | 28 | 14 | ▼ 50.0% |
| February | 24 | 17 | ▼ 29.2% |
| March | 42 | 36 | ▼ 14.3% |
| April | 35 | 31 | ▼ 11.4% |
| May | 36 | 31 | ▼ 13.9% |
| June | 8 | 26 | ▲ 225.0% |
| July | 4 | 26 | ▲ 550.0% |
| August | 23 | – | – |
| September | 26 | – | – |
| October | 29 | – | in progress |
| November | 29 | – | – |
| December | 31 | – | – |
| Year to date (Jan–Jul) | 177 | 181 | ▲ 2.3% |
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 | 62.5% | 76.9% | ▲ 23.1% |
| February | 78.3% | 94.1% | ▲ 20.3% |
| March | 97.6% | 85.7% | ▼ 12.2% |
| April | 82.9% | 80.7% | ▼ 2.7% |
| May | 60.0% | 93.6% | ▲ 55.9% |
| June | 50.0% | 92.3% | ▲ 84.6% |
| July | 0.0% | 92.3% | – |
| August | 73.9% | – | – |
| September | 84.6% | – | – |
| October | 58.6% | – | in progress |
| November | 82.8% | – | – |
| December | 66.7% | – | – |
| Year-to-date average (Jan–Jul) | 61.6% | 87.9% | ▲ 42.7% |
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 | 4 | 1 | ▼ 75.0% |
| February | 1 | 0 | ▼ 100.0% |
| March | 0 | 1 | – |
| April | 0 | 0 | – |
| May | 1 | 0 | ▼ 100.0% |
| June | 0 | 0 | – |
| July | 0 | 0 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 1 | – | – |
| Year to date (Jan–Jul) | 6 | 2 | ▼ 66.7% |
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 98.3% 565
- Cancelled 1.7% 10
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 |
|---|---|---|---|---|
| LGA HOU LaGuardia Airport – William P. Hobby Airport | 2,295 | 21.0 min | 64.4% | 110 |
| TPA MKE Tampa International Airport – General Mitchell International Airport | 1,733 | 10.9 min | 74.6% | 64 |
| PHX MCI Phoenix Sky Harbor International Airport – Kansas City International Airport | 1,677 | 5.7 min | 86.2% | 58 |
| BNA MCO Nashville International Airport – Orlando International Airport | 993 | 17.3 min | 71.4% | 57 |
| SMF PHX Sacramento International Airport – Phoenix Sky Harbor International Airport | 1,040 | 7.0 min | 93.9% | 49 |
| MSY AUS Louis Armstrong New Orleans International Airport – Austin Bergstrom International Airport | 712 | 10.0 min | 78.6% | 42 |
| ORD DEN Chicago O'Hare International Airport – Denver International Airport | 1,426 | -4.4 min | 100.0% | 33 |
| MDW DEN Chicago Midway International Airport – Denver International Airport | 1,438 | 6.8 min | 73.3% | 30 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 24 | 24 | 87.5% | 0 |
| November 2024 | 26 | 26 | 69.2% | 0 |
| December 2024 | 29 | 28 | 46.4% | 1 |
| January 2025 | 28 | 24 | 62.5% | 4 |
| February 2025 | 24 | 23 | 78.3% | 1 |
| March 2025 | 42 | 42 | 97.6% | 0 |
| April 2025 | 35 | 35 | 82.9% | 0 |
| May 2025 | 36 | 35 | 60.0% | 1 |
| June 2025 | 8 | 8 | 50.0% | 0 |
| July 2025 | 4 | 4 | 0.0% | 0 |
| August 2025 | 23 | 23 | 73.9% | 0 |
| September 2025 | 26 | 26 | 84.6% | 0 |
| October 2025 | 29 | 29 | 58.6% | 0 |
| November 2025 | 29 | 29 | 82.8% | 0 |
| December 2025 | 31 | 30 | 66.7% | 1 |
| January 2026 | 14 | 13 | 76.9% | 1 |
| February 2026 | 17 | 17 | 94.1% | 0 |
| March 2026 | 36 | 35 | 85.7% | 1 |
| April 2026 | 31 | 31 | 80.7% | 0 |
| May 2026 | 31 | 31 | 93.6% | 0 |
| June 2026 | 26 | 26 | 92.3% | 0 |
| July 2026 | 26 | 26 | 92.3% | 0 |