Southwest AirlinesWN88% on time
live
Direct flights from St Louis (STL) to San Diego (SAN): 6 nonstop departures observed each week across 1 airline. 88% of the last 8 tracked flights arrived within 15 minutes of schedule. The median arrival is 20 minutes early. No cancellations were recorded across the 8 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 St Louis and San Diego. Updated 13 November 2026 at 21:18 UTC.
Today, STL → SAN
Fri 13 Nov · local times- 08:30 WN4452Southwest Left 08:43 +13 Landed 10:10 −20
Checked STL board 15:18 · SAN board 14:40
STL
St Louis
smooth · +3
SAN
San Diego
heavy · +41
2,501 km · ~3h 42m est.
Runs reliable · 1 airline · 6x weekly · nonstop
88% on time
of the last 8 tracked STL → SAN flights arrived within 15 minutes
Median arrival delay is −20 min. 0 of 8 tracked legs cancelled in the sample. Will a delayed flight be cancelled? →
Median arrival−20 minacross the last 8 arrivals
Flight time~3h 42mestimated from route distance
Weekly departures6x1 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 boardsWeather lens
Conditions are tightest at SAN: a 51% chance of a 15+ minute delay. In this weather, the more delayed of the two airports is typically about +15 min. Both figures come from the two airports' delay records in similar weather. See live delays → · Weather risk by airport →
next sweep in 120s
How the St Louis to San Diego route actually runs
Pro Flight Search records official board updates for nonstop STL to SAN 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: St Louis (STL) to San Diego (SAN) route reliability, measured from operated flights on official airport boards.
Canonical URL
How we measure this →
https://proflightsearch.com/search-flights/STL-SAN
STL to SAN questions
Is STL–SAN running on time right now?
Mostly on schedule. The arrival side at SAN is the weaker end, route health score 69/100. The airports section above carries the live status and delay window at both ends.
Morning or evening flight on STL–SAN?
Operators schedule morning departures around 08:25 from STL. Earlier flights typically land before destination-airport delays accumulate later in the day; check the SAN delay card to confirm conditions when you'd arrive.
How long is the flight from STL to SAN?
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 STL–SAN fly?
Southwest Airlines runs the route with about 6 flights a week (sun, mon, tue, wed, thu, fri). Since one carrier owns the route, a single disruption tends to ripple through the day.
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