Southwest AirlinesWN60% on time
Flights WN3471 varies daily
live
Direct flights from San Diego (SAN) to St Louis (STL): 7 nonstop departures observed each week across 1 airline. 60% of the last 5 operated flights arrived within 15 minutes of schedule. The median arrival is 5 minutes late. No cancellations were recorded across the 5 tracked flights. The nonstop covers 2,501 km, an estimated 3 hours 42 minutes in the air. Measured by Pro Flight Search from live flight boards at San Diego and St Louis. Updated 12 September 2026 at 14:38 UTC.
SAN
San Diego
smooth · +0
STL
St Louis
smooth · +0
2,501 km · ~3h 42m est.
Runs mixed · 1 airline · 7x weekly · nonstop
60% on time
of the last 5 operated SAN → STL flights arrived within 15 minutes
Median arrival delay is +5 min. 0 of 5 tracked legs cancelled in the sample. Will a delayed flight be cancelled? →
Median arrival+5 minacross the last 5 operated legs
Flight time~3h 42mestimated from route distance
Weekly departures7x1 direct airline on the leg
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 boardsWeather lens
Current conditions put the pressure at SAN and STL: 45% odds of a 15+ minute delay and around +9 min expected when it bites, measured from this route's own weather-matched delay history. See live delays → · Weather risk by airport →
next sweep in 120s
How the San Diego to St Louis route actually runs
Pro Flight Search records official board updates for nonstop SAN 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 (SAN) 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/SAN-STL
SAN to STL questions
Is SAN–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 SAN to STL?
Great-circle distance is 2,501 km. With typical jet cruise speed plus taxi, climb and descent, expect roughly 207–244 min gate-to-gate on this route.
How often does SAN–STL fly?
Southwest Airlines runs the route with about 7 flights a week (daily). 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 SAN 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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