LGA → STL Southwest Airlines

Southwest Airlines · New York, NY to St. Louis, MO · 1,390 flights, 2025-07-01 to 2026-06-30 · aggregated across 57 flight numbers

This route runs much more reliably at some times of day than others — 93% on-time departing 6–9am vs. 58% departing 6–9pm.
On-time arrival
74%
Median delay
-5 min
90th percentile
+55 min
Cancellation rate
3%

How on-time is Southwest Airlines from LGA to STL?

Across every Southwest Airlines flight number on LGA → STL (1,390 flights, 2025-07-01 to 2026-06-30), 74% arrived within 15 minutes of schedule. Median arrival delay -5 min; the worst 10% ran +55 min or later. 3% were cancelled.

Delay distribution

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

ArrivalFlightsShare
Early / on-time1,00174%
16-30 min1148%
31-60 min1078%
61-120 min715%
2+ hrs514%

Performance by month

MonthFlightsOn-timeAvg delay
2025-0711261%+33 min
2025-0811383%+7 min
2025-0911184%+4 min
2025-1011367%+13 min
2025-1111467%+21 min
2025-1211866%+23 min
2026-0111387%-10 min
2026-029786%-5 min
2026-0311072%+5 min
2026-0411481%+0 min
2026-0511672%+13 min
2026-0611371%+20 min

Performance by day of week

DayFlightsOn-time
Mon19774%
Tue20777%
Wed20476%
Thu19873%
Fri20279%
Sat13376%
Sun20367%

Based on US DOT Bureau of Transportation Statistics on-time data. Loading the full breakdown…