Flight OddsSouthwest Airlines · St. Louis, MO to San Antonio, TX · 23 flights observed, 2026-06-04 to 2026-06-30 · 786 mi
WN3979 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”.
How often is WN3979 on time?
Across 23 flights on STL → SAT from 2026-06-04 to 2026-06-30, WN3979 arrived within 15 minutes of schedule 50% of the time. The median arrival delay was +18 min, and the worst 10% of flights arrived +125 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 | 11 | 50% |
| 16-30 min | 4 | 18% |
| 31-60 min | 4 | 18% |
| 61-120 min | 0 | 0% |
| 2+ hrs | 3 | 14% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2026-06 | 22 | 50% | +33 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 4 | 50% |
| Tue | 4 | 50% |
| Wed | 3 | 67% |
| Thu | 4 | 25% |
| Fri | 3 | 67% |
| Sat | 4 | 50% |
| 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…