Southwest AirlinesWN
Flights WN3471 12:58 Tu
live
Direct flights from San Diego (NZY) to St Louis (STL): 1 nonstop departure observed each week across 1 airline. The median arrival is 9 minutes late. No cancellations were recorded across the 1 tracked flight. The nonstop covers 2,505 km, an estimated 3 hours 43 minutes in the air. Measured by Pro Flight Search from live flight boards at San Diego and St Louis. Updated 9 September 2026 at 04:16 UTC.
NZY
San Diego
tracking
STL
St Louis
smooth · +0
2,505 km · ~3h 43m est.
Running clean · 1 airline · 1x weekly · nonstop
100 / 100
route health from live NZY and STL delay boards
Median arrival delay is +9 min. 0 of 1 tracked legs cancelled in the sample. Will a delayed flight be cancelled? →
Median arrival+9 minacross the last 1 operated legs
Flight time~3h 43mestimated from route distance
Weekly departures1x1 direct airline on the leg
The week
scheduled departures · origin local time06121824
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Southwest Airlines
Each mark is a scheduled departure at its origin-local time, observed operating in the last 7 days. Today is highlighted.
Who flies it
observed on the boards · 7 daysHistory
operated legs · board outcomesActual board outcomes rather than schedules, paired departure and arrival per flight and day.
Full board history, day by day →
Airports right now
live boardsnext sweep in 120s
How the San Diego to St Louis route actually runs
Pro Flight Search records official board updates for nonstop NZY to STL flights through the day: schedules, estimates, gate pushes and actual departures. The verdict above comes from operated flights, so it reflects what this route does rather than what the timetable promises.
Planning around a delay? Live airport delays · Weather delay risk map · Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure
Cite this data
Journalists, bloggers, and researchers may cite this page with attribution and a link to Pro Flight Search.
Suggested citation
Pro Flight Search — San Diego (NZY) to St Louis (STL) route reliability, measured from operated flights on official airport boards.
Canonical URL
How we measure this →
https://proflightsearch.com/search-flights/NZY-STL
NZY to STL questions
Is NZY–STL running on time right now?
Smooth skies ahead. Both endpoints currently score the same, route health score 100/100. The airports section above carries the live status and delay window at both ends.
How long is the flight from NZY to STL?
Great-circle distance is 2,505 km. With typical jet cruise speed plus taxi, climb and descent, expect roughly 207–245 min gate-to-gate on this route.
How often does NZY–STL fly?
Southwest Airlines runs the route with about 1 flight a week (tue). Since one carrier owns the route, a single disruption tends to ripple through the day.
What does the route health score measure?
A blend of departure-side delay at NZY and arrival-side delay at STL, computed from rolling delay windows (refreshed every 40 minutes) with a daily-rollup fallback. Current MVFR, IFR, or LIFR endpoint weather caps the score when flight rules can limit throughput. Higher is healthier: 100 means operations are clean at both ends.
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