WN878
Southwest Airlines flight 878 — Dallas (DAL) to San Antonio (SAT)
On time
76%
Avg delay
~47 min
Cancelled
1.5%
WN878 is fairly reliable, though delays happen. About 76% of departures arrive on time. When delays happen, the most common cause is late-arriving aircraft.
Monthly breakdown
| Month | On time | Cancelled | Avg delay |
|---|---|---|---|
| 2026-07 | 100% | 0.0% | 0 min |
| 2026-07 | 25% | 0.0% | 94 min |
| 2026-07 | 59% | 0.0% | 46 min |
| 2026-07 | 25% | 0.0% | 107 min |
| 2026-07 | 78% | 0.0% | 30 min |
| 2026-06 | 100% | 0.0% | 0 min |
| 2026-06 | 75% | 0.0% | 29 min |
| 2026-06 | 75% | 0.0% | 24 min |
| 2026-06 | 64% | 4.3% | 42 min |
| 2026-06 | 50% | 0.0% | 28 min |
| 2026-06 | 57% | 0.0% | 38 min |
| 2026-05 | 64% | 0.0% | 30 min |
Top delay cause
late-arriving aircraft
Based on 1,791 tracked departures
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Get a free briefingData last updated October 2026. Source: Bureau of Transportation Statistics.