WN435
WN435 (Southwest Airlines) is a multi-stop service on 38 routes, busiest Hartford to Baltimore. Of 851 departures recorded from October 2024 to July 2026, 79.8% left on time, according to the US BTS.
- On-time departures79.8%of 851 flights
- Average delay10.3 min
- July 202649▲ 88.5%vs July 2025
- Cancelled1.2%
- Legs flown under this number38
Recorded departures by month
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 | 33 | 36 | ▲ 9.1% |
| February | 28 | 41 | ▲ 46.4% |
| March | 43 | 28 | ▼ 34.9% |
| April | 36 | 45 | ▲ 25.0% |
| May | 34 | 53 | ▲ 55.9% |
| June | 26 | 47 | ▲ 80.8% |
| July | 26 | 49 | ▲ 88.5% |
| August | 30 | – | – |
| September | 30 | – | – |
| October | 44 | – | in progress |
| November | 67 | – | – |
| December | 64 | – | – |
| Year to date (Jan–Jul) | 226 | 299 | ▲ 32.3% |
according to the US BTS · October 2024 → July 2026
On-time departures by month
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 | 96.8% | 80.0% | ▼ 17.3% |
| February | 100.0% | 61.0% | ▼ 39.0% |
| March | 86.1% | 85.7% | ▼ 0.4% |
| April | 91.7% | 68.9% | ▼ 24.9% |
| May | 97.1% | 60.4% | ▼ 37.8% |
| June | 69.2% | 66.0% | ▼ 4.7% |
| July | 73.1% | 66.7% | ▼ 8.8% |
| August | 79.3% | – | – |
| September | 73.3% | – | – |
| October | 95.5% | – | in progress |
| November | 78.5% | – | – |
| December | 75.0% | – | – |
| Year-to-date average (Jan–Jul) | 87.7% | 69.8% | ▼ 20.4% |
according to the US BTS · October 2024 → July 2026
Average departure delay by month
according to the US BTS · October 2024 → July 2026
Cancelled departures by month
The most recent periods19 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 2 | 1 | ▼ 50.0% |
| February | 3 | 0 | ▼ 100.0% |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 0 | 1 | – |
| August | 1 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 2 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 5 | 2 | ▼ 60.0% |
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 98.8% 841
- Cancelled 1.2% 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
10Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 20 | 20 | 90.0% | 0 |
| November 2024 | 32 | 32 | 96.9% | 0 |
| December 2024 | 39 | 39 | 97.4% | 0 |
| January 2025 | 33 | 31 | 96.8% | 2 |
| February 2025 | 28 | 25 | 100.0% | 3 |
| March 2025 | 43 | 43 | 86.1% | 0 |
| April 2025 | 36 | 36 | 91.7% | 0 |
| May 2025 | 34 | 34 | 97.1% | 0 |
| June 2025 | 26 | 26 | 69.2% | 0 |
| July 2025 | 26 | 26 | 73.1% | 0 |
| August 2025 | 30 | 29 | 79.3% | 1 |
| September 2025 | 30 | 30 | 73.3% | 0 |
| October 2025 | 44 | 44 | 95.5% | 0 |
| November 2025 | 67 | 65 | 78.5% | 2 |
| December 2025 | 64 | 64 | 75.0% | 0 |
| January 2026 | 36 | 35 | 80.0% | 1 |
| February 2026 | 41 | 41 | 61.0% | 0 |
| March 2026 | 28 | 28 | 85.7% | 0 |
| April 2026 | 45 | 45 | 68.9% | 0 |
| May 2026 | 53 | 53 | 60.4% | 0 |
| June 2026 | 47 | 47 | 66.0% | 0 |
| July 2026 | 49 | 48 | 66.7% | 1 |