WN603
WN603 (Southwest Airlines) is a multi-stop service on 25 routes, busiest San Juan to Baltimore. Of 631 departures recorded from October 2024 to July 2026, 72.4% left on time, according to the US BTS.
- On-time departures72.4%of 631 flights
- Average delay15.4 min
- July 202631▲ 0.0%vs July 2025
- Cancelled0.6%
- Legs flown under this number25
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 | 13 | ▼ 58.1% |
| February | 28 | 19 | ▼ 32.1% |
| March | 31 | 29 | ▼ 6.5% |
| April | 30 | 27 | ▼ 10.0% |
| May | 31 | 26 | ▼ 16.1% |
| June | 30 | 30 | 0.0% |
| July | 31 | 31 | 0.0% |
| August | 38 | – | – |
| September | 38 | – | – |
| October | 35 | – | in progress |
| November | 29 | – | – |
| December | 29 | – | – |
| Year to date (Jan–Jul) | 212 | 175 | ▼ 17.5% |
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 | 70.0% | 72.7% | ▲ 3.9% |
| February | 71.4% | 63.2% | ▼ 11.6% |
| March | 77.4% | 86.2% | ▲ 11.4% |
| April | 86.7% | 51.9% | ▼ 40.2% |
| May | 83.9% | 38.5% | ▼ 54.1% |
| June | 76.7% | 56.7% | ▼ 26.1% |
| July | 83.9% | 41.9% | ▼ 50.0% |
| August | 71.1% | – | – |
| September | 86.8% | – | – |
| October | 91.4% | – | in progress |
| November | 58.6% | – | – |
| December | 53.6% | – | – |
| Year-to-date average (Jan–Jul) | 78.6% | 58.7% | ▼ 25.3% |
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 | 2 | ▲ 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 | 0 | – | – |
| December | 1 | – | – |
| Year to date (Jan–Jul) | 1 | 2 | ▲ 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 99.4% 627
- Cancelled 0.6% 4
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 |
|---|---|---|---|---|
| SJU BWI Luis Munoz Marin International Airport – Baltimore/Washington International Thurgood Marshall Airport | 2,525 | 15.1 min | 75.0% | 121 |
| SAT BNA San Antonio International Airport – Nashville International Airport | 1,322 | 9.1 min | 86.2% | 58 |
| BNA MYR Nashville International Airport – Myrtle Beach International Airport | 757 | 28.5 min | 48.3% | 58 |
| MCO DEN Orlando International Airport – Denver International Airport | 2,486 | 11.7 min | 82.7% | 52 |
| LAX DAL Los Angeles International Airport – Dallas Love Field | 2,002 | 36.2 min | 40.0% | 50 |
| AUS LAS Austin Bergstrom International Airport – Harry Reid International Airport | 1,752 | 26.3 min | 52.2% | 46 |
| PIT AUS Pittsburgh International Airport – Austin Bergstrom International Airport | 1,946 | 6.9 min | 76.2% | 42 |
| BNA AUS Nashville International Airport – Austin Bergstrom International Airport | 1,215 | 8.9 min | 87.9% | 33 |
| BNA PNS Nashville International Airport – Pensacola International Airport | 630 | 10.5 min | 75.0% | 30 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 14 | 14 | 92.9% | 0 |
| November 2024 | 30 | 30 | 83.3% | 0 |
| December 2024 | 31 | 31 | 87.1% | 0 |
| January 2025 | 31 | 30 | 70.0% | 1 |
| February 2025 | 28 | 28 | 71.4% | 0 |
| March 2025 | 31 | 31 | 77.4% | 0 |
| April 2025 | 30 | 30 | 86.7% | 0 |
| May 2025 | 31 | 31 | 83.9% | 0 |
| June 2025 | 30 | 30 | 76.7% | 0 |
| July 2025 | 31 | 31 | 83.9% | 0 |
| August 2025 | 38 | 38 | 71.1% | 0 |
| September 2025 | 38 | 38 | 86.8% | 0 |
| October 2025 | 35 | 35 | 91.4% | 0 |
| November 2025 | 29 | 29 | 58.6% | 0 |
| December 2025 | 29 | 28 | 53.6% | 1 |
| January 2026 | 13 | 11 | 72.7% | 2 |
| February 2026 | 19 | 19 | 63.2% | 0 |
| March 2026 | 29 | 29 | 86.2% | 0 |
| April 2026 | 27 | 27 | 51.9% | 0 |
| May 2026 | 26 | 26 | 38.5% | 0 |
| June 2026 | 30 | 30 | 56.7% | 0 |
| July 2026 | 31 | 31 | 41.9% | 0 |