WN1304
WN1304 (Southwest Airlines) is a multi-stop service on 29 routes, busiest Boston to Denver. Of 677 departures recorded from October 2024 to July 2026, 73.0% left on time, according to the US BTS.
- On-time departures73.0%of 677 flights
- Average delay14.2 min
- July 202647▲ 161.1%vs July 2025
- Cancelled0.3%
- Legs flown under this number29
according to the US BTS · Oct 13, 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 | 30 | 31 | ▲ 3.3% |
| February | 26 | 25 | ▼ 3.8% |
| March | 31 | 47 | ▲ 51.6% |
| April | 27 | 34 | ▲ 25.9% |
| May | 27 | 32 | ▲ 18.5% |
| June | 17 | 45 | ▲ 164.7% |
| July | 18 | 47 | ▲ 161.1% |
| August | 29 | – | – |
| September | 30 | – | – |
| October | 30 | – | in progress |
| November | 29 | – | – |
| December | 31 | – | – |
| Year to date (Jan–Jul) | 176 | 261 | ▲ 48.3% |
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 | 96.7% | 80.7% | ▼ 16.6% |
| February | 84.6% | 48.0% | ▼ 43.3% |
| March | 77.4% | 57.5% | ▼ 25.8% |
| April | 63.0% | 67.7% | ▲ 7.4% |
| May | 88.9% | 59.4% | ▼ 33.2% |
| June | 76.5% | 55.6% | ▼ 27.3% |
| July | 50.0% | 44.7% | ▼ 10.6% |
| August | 82.8% | – | – |
| September | 76.7% | – | – |
| October | 80.0% | – | in progress |
| November | 92.6% | – | – |
| December | 90.3% | – | – |
| Year-to-date average (Jan–Jul) | 76.7% | 59.1% | ▼ 23.0% |
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 | 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) | 0 | 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 99.7% 675
- Cancelled 0.3% 2
Share of all recorded flights in the period, all legs. · Oct 13, 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 |
|---|---|---|---|---|
| BOS DEN Boston Logan International Airport – Denver International Airport | 2,816 | 6.1 min | 89.0% | 118 |
| MKE BNA General Mitchell International Airport – Nashville International Airport | 766 | 2.2 min | 90.2% | 63 |
| DAL DEN Dallas Love Field – Denver International Airport | 1,048 | 37.3 min | 39.7% | 58 |
| SRQ STL Sarasota Bradenton International Airport – St. Louis Lambert International Airport | 1,456 | 5.4 min | 84.0% | 50 |
| MDW DAL Chicago Midway International Airport – Dallas Love Field | 1,277 | 4.3 min | 88.1% | 42 |
| BWI SAN Baltimore/Washington International Thurgood Marshall Airport – San Diego International Airport | 3,686 | 27.7 min | 52.4% | 42 |
| LAX PHX Los Angeles International Airport – Phoenix Sky Harbor International Airport | 595 | 15.4 min | 63.6% | 33 |
| DEN PHX Denver International Airport – Phoenix Sky Harbor International Airport | 968 | 12.3 min | 63.6% | 33 |
| SAT BNA San Antonio International Airport – Nashville International Airport | 1,322 | 15.1 min | 80.0% | 30 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 22 | 22 | 95.5% | 0 |
| November 2024 | 30 | 30 | 80.0% | 0 |
| December 2024 | 39 | 39 | 87.2% | 0 |
| January 2025 | 30 | 30 | 96.7% | 0 |
| February 2025 | 26 | 26 | 84.6% | 0 |
| March 2025 | 31 | 31 | 77.4% | 0 |
| April 2025 | 27 | 27 | 63.0% | 0 |
| May 2025 | 27 | 27 | 88.9% | 0 |
| June 2025 | 17 | 17 | 76.5% | 0 |
| July 2025 | 18 | 18 | 50.0% | 0 |
| August 2025 | 29 | 29 | 82.8% | 0 |
| September 2025 | 30 | 30 | 76.7% | 0 |
| October 2025 | 30 | 30 | 80.0% | 0 |
| November 2025 | 29 | 27 | 92.6% | 2 |
| December 2025 | 31 | 31 | 90.3% | 0 |
| January 2026 | 31 | 31 | 80.7% | 0 |
| February 2026 | 25 | 25 | 48.0% | 0 |
| March 2026 | 47 | 47 | 57.5% | 0 |
| April 2026 | 34 | 34 | 67.7% | 0 |
| May 2026 | 32 | 32 | 59.4% | 0 |
| June 2026 | 45 | 45 | 55.6% | 0 |
| July 2026 | 47 | 47 | 44.7% | 0 |