WN1031 BOS → STL

Southwest Airlines · Boston, MA to St. Louis, MO · 33 flights observed, 2026-03-05 to 2026-04-06 · 1,047 mi

This flight has been on time less than half the time (39%) — expect a real chance of a delay.

WN1031 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
39%
Median delay
+18 min
90th percentile
+81 min
Cancellation rate
0%

How often is WN1031 on time?

Across 33 flights on BOS → STL from 2026-03-05 to 2026-04-06, WN1031 arrived within 15 minutes of schedule 39% of the time. The median arrival delay was +18 min, and the worst 10% of flights arrived +81 min or later. 0% of flights were cancelled.

Delay distribution

Arrival delay for completed flights (excludes cancellations and diversions).

ArrivalFlightsShare
Early / on-time1339%
16-30 min1133%
31-60 min412%
61-120 min412%
2+ hrs13%

Performance by month

MonthFlightsOn-timeAvg delay
2026-032733%+33 min
2026-04667%+4 min

Performance by day of week

DayFlightsOn-time
Mon560%
Tue475%
Wed425%
Thu540%
Fri540%
Sat540%
Sun50%

Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…