Flight OddsSouthwest Airlines · St. Louis, MO to Philadelphia, PA · 33 flights observed, 2026-03-05 to 2026-04-06 · 814 mi
WN3686 covers more than one route in the data window — the stats below are for STL → PHL, the one it has flown most recently. The others are linked under “Other routes”.
How often is WN3686 on time?
Across 33 flights on STL → PHL from 2026-03-05 to 2026-04-06, WN3686 arrived within 15 minutes of schedule 55% of the time. The median arrival delay was +12 min, and the worst 10% of flights arrived +90 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 | 18 | 55% |
| 16-30 min | 3 | 9% |
| 31-60 min | 6 | 18% |
| 61-120 min | 5 | 15% |
| 2+ hrs | 1 | 3% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2026-03 | 27 | 48% | +36 min |
| 2026-04 | 6 | 83% | +4 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 5 | 80% |
| Tue | 4 | 25% |
| Wed | 4 | 25% |
| Thu | 5 | 80% |
| Fri | 5 | 60% |
| Sat | 5 | 60% |
| Sun | 5 | 40% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…