Flight OddsWN3978 STL → SAT
Southwest Airlines · St. Louis, MO to San Antonio, TX · 12 flights observed, 2026-06-04 to 2026-06-29 · 786 mi
WN3978 covers more than one route in the data window — the stats below are for STL → SAT, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
58%
Median delay
+6 min
90th percentile
+68 min
Cancellation rate
0%
How often is WN3978 on time?
Across 12 flights on STL → SAT from 2026-06-04 to 2026-06-29, WN3978 arrived within 15 minutes of schedule 58% of the time. The median arrival delay was +6 min, and the worst 10% of flights arrived +68 min or later. 0% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 7 | 58% |
| 16-30 min | 2 | 17% |
| 31-60 min | 1 | 8% |
| 61-120 min | 1 | 8% |
| 2+ hrs | 1 | 8% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2026-06 | 12 | 58% | +28 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 4 | 0% |
| Tue | No data | — |
| Wed | No data | — |
| Thu | 4 | 75% |
| Fri | 4 | 100% |
| Sat | No data | — |
| Sun | No data | — |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…