WN3857
WN3857 (Southwest Airlines) is a multi-stop service on 16 routes, busiest Tampa to Denver. Of 464 departures recorded from October 2024 to July 2026, 68.9% left on time, according to the US BTS.
- On-time departures68.9%of 464 flights
- Average delay16.5 min
- July 202621▼ 32.3%vs July 2025
- Cancelled0.2%
- Legs flown under this number16
Recorded departures by month
All legs under this number combined; see the leg table.
Months without data are left blank.
The most recent periods17 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 28 | 5 | ▼ 82.1% |
| February | 26 | – | – |
| March | 24 | 25 | ▲ 4.2% |
| April | 31 | 27 | ▼ 12.9% |
| May | 36 | 26 | ▼ 27.8% |
| June | 30 | 23 | ▼ 23.3% |
| July | 31 | 21 | ▼ 32.3% |
| August | 4 | – | – |
| September | – | – | – |
| October | 29 | – | in progress |
| November | 20 | – | – |
| December | 20 | – | – |
according to the US BTS · October 2024 → July 2026
On-time departures by month
Months without data are left blank.
On time = departure within 15 minutes of schedule. Non-cancelled flights with a recorded delay only.
The most recent periods17 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 71.4% | 100.0% | ▲ 40.0% |
| February | 65.4% | – | – |
| March | 70.8% | 48.0% | ▼ 32.2% |
| April | 71.0% | 70.4% | ▼ 0.8% |
| May | 61.1% | 50.0% | ▼ 18.2% |
| June | 80.0% | 56.5% | ▼ 29.3% |
| July | 54.8% | 75.0% | ▲ 36.8% |
| August | 50.0% | – | – |
| September | – | – | – |
| October | 75.9% | – | in progress |
| November | 95.0% | – | – |
| December | 70.0% | – | – |
according to the US BTS · October 2024 → July 2026
Average departure delay by month
Months without data are left blank.
according to the US BTS · October 2024 → July 2026
Cancelled departures by month
Months without data are left blank.
The most recent periods17 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 0 | 0 | – |
| February | 0 | – | – |
| March | 0 | 0 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 0 | – |
| July | 0 | 1 | – |
| August | 0 | – | – |
| September | – | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 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 99.8% 463
- Cancelled 0.2% 1
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 |
|---|---|---|---|---|
| TPA DEN Tampa International Airport – Denver International Airport | 2,423 | 20.4 min | 63.3% | 60 |
| SJC PHX Mineta San Jose International Airport – Phoenix Sky Harbor International Airport | 999 | 14.7 min | 70.7% | 58 |
| SAT MCO San Antonio International Airport – Orlando International Airport | 1,672 | 31.4 min | 66.0% | 50 |
| BOS AUS Boston Logan International Airport – Austin Bergstrom International Airport | 2,729 | 18.1 min | 56.0% | 50 |
| MTJ DEN Montrose Regional Airport – Denver International Airport | 316 | 8.8 min | 84.1% | 44 |
| SNA PHX John Wayne Orange County International Airport – Phoenix Sky Harbor International Airport | 544 | 9.6 min | 67.5% | 41 |
| MDW ONT Chicago Midway International Airport – Ontario International Airport | 2,740 | 16.0 min | 76.7% | 30 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 19 | 19 | 89.5% | 0 |
| November 2024 | 21 | 21 | 85.7% | 0 |
| December 2024 | 18 | 18 | 61.1% | 0 |
| January 2025 | 28 | 28 | 71.4% | 0 |
| February 2025 | 26 | 26 | 65.4% | 0 |
| March 2025 | 24 | 24 | 70.8% | 0 |
| April 2025 | 31 | 31 | 71.0% | 0 |
| May 2025 | 36 | 36 | 61.1% | 0 |
| June 2025 | 30 | 30 | 80.0% | 0 |
| July 2025 | 31 | 31 | 54.8% | 0 |
| August 2025 | 4 | 4 | 50.0% | 0 |
| October 2025 | 29 | 29 | 75.9% | 0 |
| November 2025 | 20 | 20 | 95.0% | 0 |
| December 2025 | 20 | 20 | 70.0% | 0 |
| January 2026 | 5 | 5 | 100.0% | 0 |
| March 2026 | 25 | 25 | 48.0% | 0 |
| April 2026 | 27 | 27 | 70.4% | 0 |
| May 2026 | 26 | 26 | 50.0% | 0 |
| June 2026 | 23 | 23 | 56.5% | 0 |
| July 2026 | 21 | 20 | 75.0% | 1 |