Flight OddsWN4998 STL → BOS
Southwest Airlines · St. Louis, MO to Boston, MA · 53 flights observed, 2026-01-06 to 2026-03-04 · 1,047 mi
WN4998 covers more than one route in the data window — the stats below are for STL → BOS, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
74%
Median delay
0 min
90th percentile
+31 min
Cancellation rate
6%
How often is WN4998 on time?
Across 53 flights on STL → BOS from 2026-01-06 to 2026-03-04, WN4998 arrived within 15 minutes of schedule 74% of the time. The median arrival delay was 0 min, and the worst 10% of flights arrived +31 min or later. 6% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 37 | 74% |
| 16-30 min | 8 | 16% |
| 31-60 min | 4 | 8% |
| 61-120 min | 0 | 0% |
| 2+ hrs | 1 | 2% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2026-01 | 21 | 71% | +7 min |
| 2026-02 | 25 | 76% | +7 min |
| 2026-03 | 4 | 75% | +3 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 7 | 57% |
| Tue | 9 | 67% |
| Wed | 9 | 67% |
| Thu | 8 | 100% |
| Fri | 8 | 75% |
| Sat | 3 | 67% |
| Sun | 6 | 83% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…