WN1879 STL → LAS

Southwest Airlines · St. Louis, MO to Las Vegas, NV · 19 flights observed, 2026-01-10 to 2026-03-02 · 1,371 mi

This flight runs much more reliably at some times of day than others — 100% on-time departing 9am–12pm vs. 64% departing 6–9pm.

WN1879 covers more than one route in the data window — the stats below are for STL → LAS, the one it has flown most recently. The others are linked under “Other routes”.

On-time arrival
74%
Median delay
-2 min
90th percentile
+60 min
Cancellation rate
0%

How often is WN1879 on time?

Across 19 flights on STL → LAS from 2026-01-10 to 2026-03-02, WN1879 arrived within 15 minutes of schedule 74% of the time. The median arrival delay was -2 min, and the worst 10% of flights arrived +60 min or later. 0% of flights were cancelled.

Delay distribution

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

ArrivalFlightsShare
Early / on-time1474%
16-30 min15%
31-60 min316%
61-120 min15%
2+ hrs00%

Performance by month

MonthFlightsOn-timeAvg delay
2026-01989%-10 min
2026-02956%+20 min
2026-031100%+4 min

Performance by day of week

DayFlightsOn-time
Mon475%
Tue10%
WedNo data—
Thu367%
Fri2100%
Sat5100%
Sun450%

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