WN553
WN553 (Southwest Airlines) is a multi-stop service on 41 routes, busiest Denver to Chicago. Of 687 departures recorded from October 2024 to July 2026, 74.5% left on time, according to the US BTS.
- On-time departures74.5%of 687 flights
- Average delay13.0 min
- July 202655▲ 83.3%vs July 2025
- Cancelled0.7%
- Legs flown under this number41
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 | 44 | 32 | ▼ 27.3% |
| February | 43 | 28 | ▼ 34.9% |
| March | 24 | 31 | ▲ 29.2% |
| April | 27 | 26 | ▼ 3.7% |
| May | 31 | 26 | ▼ 16.1% |
| June | 30 | 52 | ▲ 73.3% |
| July | 30 | 55 | ▲ 83.3% |
| August | 16 | – | – |
| September | 13 | – | – |
| October | 33 | – | in progress |
| November | 42 | – | – |
| December | 35 | – | – |
| Year to date (Jan–Jul) | 229 | 250 | ▲ 9.2% |
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 | 88.4% | 80.0% | ▼ 9.5% |
| February | 85.7% | 71.4% | ▼ 16.7% |
| March | 62.5% | 41.9% | ▼ 32.9% |
| April | 88.9% | 76.9% | ▼ 13.5% |
| May | 96.8% | 80.8% | ▼ 16.5% |
| June | 60.0% | 28.9% | ▼ 51.9% |
| July | 63.3% | 64.8% | ▲ 2.3% |
| August | 87.5% | – | – |
| September | 100.0% | – | – |
| October | 75.8% | – | in progress |
| November | 81.0% | – | – |
| December | 85.7% | – | – |
| Year-to-date average (Jan–Jul) | 77.9% | 63.5% | ▼ 18.5% |
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 | 1 | 2 | ▲ 100.0% |
| February | 1 | 0 | ▼ 100.0% |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 0 | 1 | – |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 2 | 3 | ▲ 50.0% |
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 99.3% 682
- Cancelled 0.7% 5
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
7| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| DEN MDW Denver International Airport – Chicago Midway International Airport | 1,438 | 0.5 min | 93.8% | 65 |
| MSY HOU Louis Armstrong New Orleans International Airport – William P. Hobby Airport | 485 | 8.2 min | 79.7% | 64 |
| HOU LAS William P. Hobby Airport – Harry Reid International Airport | 1,985 | 18.8 min | 60.0% | 60 |
| SAN SJC San Diego International Airport – Mineta San Jose International Airport | 671 | 11.8 min | 76.8% | 58 |
| BNA PHX Nashville International Airport – Phoenix Sky Harbor International Airport | 2,326 | -0.1 min | 96.6% | 58 |
| BNA CHS Nashville International Airport – Charleston International Airport | 706 | 7.1 min | 85.0% | 40 |
| DAL PHX Dallas Love Field – Phoenix Sky Harbor International Airport | 1,412 | 1.3 min | 91.2% | 34 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 21 | 21 | 100.0% | 0 |
| November 2024 | 19 | 19 | 100.0% | 0 |
| December 2024 | 29 | 29 | 82.8% | 0 |
| January 2025 | 44 | 43 | 88.4% | 1 |
| February 2025 | 43 | 42 | 85.7% | 1 |
| March 2025 | 24 | 24 | 62.5% | 0 |
| April 2025 | 27 | 27 | 88.9% | 0 |
| May 2025 | 31 | 31 | 96.8% | 0 |
| June 2025 | 30 | 30 | 60.0% | 0 |
| July 2025 | 30 | 30 | 63.3% | 0 |
| August 2025 | 16 | 16 | 87.5% | 0 |
| September 2025 | 13 | 13 | 100.0% | 0 |
| October 2025 | 33 | 33 | 75.8% | 0 |
| November 2025 | 42 | 42 | 81.0% | 0 |
| December 2025 | 35 | 35 | 85.7% | 0 |
| January 2026 | 32 | 30 | 80.0% | 2 |
| February 2026 | 28 | 28 | 71.4% | 0 |
| March 2026 | 31 | 31 | 41.9% | 0 |
| April 2026 | 26 | 26 | 76.9% | 0 |
| May 2026 | 26 | 26 | 80.8% | 0 |
| June 2026 | 52 | 52 | 28.9% | 0 |
| July 2026 | 55 | 54 | 64.8% | 1 |