STL → SANSt Louis to San Diego

live

Direct flights from St Louis (STL) to San Diego (SAN): 7 nonstop departures observed each week across 1 airline. 83% of the last 6 operated flights arrived within 15 minutes of schedule. The median arrival is on schedule. No cancellations were recorded across the 6 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 11 September 2026 at 20:18 UTC.

STL St Louis heavy · +33
SAN San Diego busy · +29
2,501 km · ~3h 42m est.
dep bank 08:35–14:157x weekly
Runs reliable · 1 airline · 7x weekly · nonstop
83% on time

of the last 6 operated STL → SAN flights arrived within 15 minutes

Median arrival delay is +0 min. 0 of 6 tracked legs cancelled in the sample. Will a delayed flight be cancelled? →

Median arrival+0 minacross the last 6 operated legs
Flight time~3h 42mestimated from route distance
Weekly departures7x1 direct airline on the leg

The week

scheduled departures · origin local time
06121824
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 days
Southwest AirlinesWN83% on time

Flights WN3886 varies Mo Tu We Th Fr Su · WN3181 14:15 Sa

History

operated legs · board outcomes
09-11WN3886dep +17 → arr−3
09-10WN3886dep +13 → arr−5
09-09WN3886dep +11 → arr−18
09-08WN3886dep +38 → arr+12
09-07WN3886dep +26 → arr+0
09-06WN3908dep +8 → arr+25

Actual board outcomes rather than schedules, paired departure and arrival per flight and day.

Full board history, day by day →

Airports right now

live boards
STLSt Louis +33 min heavy 🌤 scattered clouds · S 6 kt Full STL delay board →
SANSan Diego +29 min busy 🌤 few clouds · 5 kt Full SAN delay board →

Weather lens

Current conditions put the pressure at SAN: 54% odds of a 15+ minute delay and around +17 min expected when it bites, measured from this route's own weather-matched delay history. See live delays → · Weather risk by airport →

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
https://proflightsearch.com/search-flights/STL-SAN
How we measure this →

STL to SAN questions

Is STL–SAN running on time right now?

Some delays possible. The departure side at STL is the weaker end, route health score 59/100. The airports section above carries the live status and delay window at both ends.

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 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 STL and arrival-side delay at SAN, 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.