Flight OddsWN1399 BOS → STL
Southwest Airlines · Boston, MA to St. Louis, MO · 42 flights observed, 2025-11-02 to 2026-01-05 · 1,047 mi
WN1399 covers more than one route in the data window — the stats below are for BOS → STL, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
67%
Median delay
+7 min
90th percentile
+62 min
Cancellation rate
0%
How often is WN1399 on time?
Across 42 flights on BOS → STL from 2025-11-02 to 2026-01-05, WN1399 arrived within 15 minutes of schedule 67% of the time. The median arrival delay was +7 min, and the worst 10% of flights arrived +62 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 | 28 | 67% |
| 16-30 min | 5 | 12% |
| 31-60 min | 4 | 10% |
| 61-120 min | 4 | 10% |
| 2+ hrs | 1 | 2% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-11 | 22 | 64% | +25 min |
| 2025-12 | 18 | 72% | +12 min |
| 2026-01 | 2 | 50% | +10 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 7 | 86% |
| Tue | 6 | 67% |
| Wed | 8 | 88% |
| Thu | 8 | 50% |
| Fri | 6 | 50% |
| Sat | No data | — |
| Sun | 7 | 57% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…