Airlines › Southwest Airlines › May 2025
Carrier month · May 2025
Southwest Airlines in May 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 May 2025, Southwest Airlines (WN) reported 119,819 scheduled domestic flights. 76.3% arrived on time, 0.5% were cancelled and 0.3% diverted.
All reporting carriers together recorded 75.4% on time and 1.0% cancelled that month, so the carrier was 0.9 points above the combined figure.
A year earlier, in May 2024, it reported 122,496 flights with 71.4% on time: a change of +4.9 points.
Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 50%, air carrier 24% and national aviation system 22%.
- On time 76.3%
- Arrived 15+ minutes late 22.9%
- Cancelled 0.5%
- Diverted 0.3%
May 2025 against a year earlier, the carrier's year and all carriers
| Measure | May 2025 | May 2024 | WN, 12 months to Jul 2026 | All carriers, May 2025 |
|---|---|---|---|---|
| Arrived on time | 76.3% | 71.4% | 75.5% | 75.4% |
| Departed on time | 73.6% | 68.9% | 71.2% | 76.7% |
| Cancelled | 0.5% | 0.7% | 0.9% | 1.0% |
| Average arrival delay | 8.3 min | 12.9 min | 6.8 min | 10.2 min |
| Scheduled flights a day | 3,994 | 4,083 | 3,808 | 20,188 |
| Scheduled flights | 119,819 | 122,496 | 1,389,951 | 605,648 |
104 airports and 1,586 routes had WN flights that month.
Busiest airports that month
| Airport | Departures | On time | Avg arrival delay | Cancelled |
|---|---|---|---|---|
| LAS Las Vegas | 7,718 | 75.9% | 6.5 min | 0.3% |
| DEN Denver | 7,712 | 64.7% | 20.4 min | 0.5% |
| BWI Baltimore | 6,186 | 72.5% | 11.7 min | 0.4% |
| PHX Phoenix | 6,122 | 75.0% | 8.1 min | 0.5% |
| DAL Dallas | 6,011 | 69.4% | 14.7 min | 1.9% |
| MDW Chicago | 5,596 | 78.1% | 6.3 min | 0.3% |
| BNA Nashville | 5,041 | 72.5% | 10.5 min | 1.0% |
| HOU Houston | 4,415 | 76.2% | 8.7 min | 0.6% |
| MCO Orlando | 3,978 | 69.4% | 15.2 min | 0.5% |
| STL St. Louis | 3,563 | 75.9% | 8.6 min | 1.1% |
| AUS Austin | 3,300 | 72.5% | 10.6 min | 0.9% |
| SAN San Diego | 2,984 | 75.8% | 7.1 min | 0.3% |
| SMF Sacramento | 2,826 | 82.2% | 3.3 min | 0.3% |
| OAK Oakland | 2,787 | 84.0% | 0.9 min | 0.3% |
| SJC San Jose | 2,360 | 83.6% | 1.9 min | 0.1% |
By scheduled departure hour
Delay causes
Questions and answers
What share of Southwest Airlines flights were on time in May 2025?
76.3% of 119,819 scheduled domestic flights arrived less than 15 minutes late; all reporting carriers together recorded 75.4% that month.
How does that compare with a year earlier?
In May 2024 the carrier reported 122,496 flights with 71.4% on time and 0.7% cancelled, against 76.3% and 0.5% in May 2025.
Provenance
Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for May 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.