O'Fallon, Missouri to San Diego: Road Trip Guide & Distance

How far is O'Fallon, Missouri from San Diego?

The distance from O'Fallon, Missouri to San Diego is 1536 miles (2472 km) as the crow flies. San Diego is located W of O'Fallon, Missouri. By car, the driving distance is approximately 1845.2 miles, taking about 32h 26min. A direct flight would take roughly 3h 35min. Both are located in United States — O'Fallon, Missouri in Missouri and San Diego in California.

This is a serious multi-day road trip! We strongly recommend breaking this journey up with an overnight stay to ensure you arrive safely and refreshed. Since you'll be heading mostly West, pack a good pair of sunglasses if you plan to drive during the late afternoon to avoid the harsh sun glare. For a trip of this distance, flying is significantly faster. However, driving offers the flexibility to explore stops along the way.

Coordinates come from public place data for O'Fallon, Missouri and San Diego. The driving distance uses an OSRM road-route result when route data is available. Fuel, flight, bus, and train values are planning estimates and can change by date, provider, road closures, and border rules.