Airlines › Southwest Airlines › December 2025
Carrier month · December 2025
Southwest Airlines in December 2025
BTS: A flight is counted as on time if it arrived less than 15 minutes after its scheduled time. Only carriers with at least 0.5 percent of domestic scheduled passenger revenue report.
In December 2025, Southwest Airlines (WN) reported 118,075 scheduled domestic flights. 74.8% arrived on time, 0.6% were cancelled and 0.2% diverted.
All reporting carriers together recorded 71.9% on time and 1.5% cancelled that month, so the carrier was 2.9 points above the combined figure.
A year earlier, in December 2024, it reported 116,276 flights with 79.9% on time: a change of −5.1 points.
Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 54%, air carrier 28% and national aviation system 16%.
- On time 74.8%
- Arrived 15+ minutes late 24.4%
- Cancelled 0.6%
- Diverted 0.2%
December 2025 against a year earlier, the carrier's year and all carriers
| Measure | Dec 2025 | Dec 2024 | WN, 12 months to Jul 2026 | All carriers, Dec 2025 |
|---|---|---|---|---|
| Arrived on time | 74.8% | 79.9% | 75.5% | 71.9% |
| Departed on time | 70.1% | 76.0% | 71.2% | 72.0% |
| Cancelled | 0.6% | 0.5% | 0.9% | 1.5% |
| Average arrival delay | 7.8 min | 4.7 min | 6.8 min | 13.0 min |
| Scheduled flights a day | 3,936 | 3,876 | 3,808 | 19,410 |
| Scheduled flights | 118,075 | 116,276 | 1,389,951 | 582,304 |
104 airports and 1,626 routes had WN flights that month.
Busiest airports that month
| Airport | Departures | On time | Avg arrival delay | Cancelled |
|---|---|---|---|---|
| DEN Denver | 7,415 | 67.9% | 13.7 min | 0.6% |
| LAS Las Vegas | 7,299 | 76.6% | 5.7 min | 0.4% |
| BWI Baltimore | 6,064 | 69.1% | 10.0 min | 1.1% |
| PHX Phoenix | 5,992 | 72.8% | 9.4 min | 0.4% |
| DAL Dallas | 5,926 | 78.2% | 5.4 min | 0.4% |
| MDW Chicago | 5,371 | 69.3% | 11.4 min | 0.3% |
| BNA Nashville | 5,069 | 76.3% | 5.5 min | 0.4% |
| MCO Orlando | 4,538 | 70.4% | 12.0 min | 0.6% |
| HOU Houston | 4,315 | 81.5% | 2.9 min | 0.4% |
| STL St. Louis | 3,453 | 73.7% | 10.1 min | 0.3% |
| AUS Austin | 3,297 | 77.9% | 5.5 min | 0.1% |
| SAN San Diego | 3,202 | 71.6% | 8.0 min | 1.1% |
| SMF Sacramento | 2,728 | 75.6% | 6.7 min | 0.6% |
| OAK Oakland | 2,388 | 75.0% | 7.4 min | 0.6% |
| SJC San Jose | 2,214 | 77.5% | 5.7 min | 0.6% |
By scheduled departure hour
Delay causes
Questions and answers
What share of Southwest Airlines flights were on time in December 2025?
74.8% of 118,075 scheduled domestic flights arrived less than 15 minutes late; all reporting carriers together recorded 71.9% that month.
How does that compare with a year earlier?
In December 2024 the carrier reported 116,276 flights with 79.9% on time and 0.5% cancelled, against 74.8% and 0.6% in December 2025.
Provenance
Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for December 2025; public domain. Domestic scheduled flights, totals and averages only. The site's data runs through July 2026. Full record for Southwest Airlines · methodology · corrections.