City comparison
San Diego, CA is about 275 miles (425 km) from San Luis Obispo, CA in a straight line. By road, the drive is roughly 325 miles, or about 5 h 30 min behind the wheel at highway speeds.
Driving distance is a rough estimate (great-circle × 1.25); driving time assumes a 60 mph blended average. Real trips run 10–20% longer with stops.
A direct flight from San Diego, CA to San Luis Obispo, CA takes about 32 min, covering roughly 275 miles in a straight line. Connecting itineraries with a layover typically add 1–3 hours.
Block-to-block estimate at ~500 mph cruise, including taxi, climb, and descent — what an airline would publish, not pure airborne time.
San Diego has a population of 1,383,987, vs 47,529 in San Luis Obispo — about 29.1× larger by population. By land area, San Diego covers about 325 sq mi vs 14 sq mi for San Luis Obispo.
Population from US Census ACS. Land area from the Census Gazetteer (city proper, excluding inland water).
Cost indices by category, with the US city average (100) marked.
Index: 100 = US city average. Lower is more affordable.
Side-by-side costs, salaries, and sub-category indices.
| Metric | San Diego | San Luis Obispo | Difference |
|---|---|---|---|
| Median rent | $2,080/mo | $1,850/mo | 12.4% higher in San Diego |
| Median home value | $783,300 | $841,700 | 7.5% higher in San Luis Obispo |
| Median household income | $98,657 | $65,000 | 51.8% higher in San Diego |
| Groceries index | 107.6 | 105.1 | 2.4% higher in San Diego |
| Utilities index | 169.8 | 145.8 | 16.5% higher in San Diego |
| Transportation index | 100.0 | 100.7 | 0.6% higher in San Luis Obispo |
| Healthcare index | 100.0 | 100.6 | 0.6% higher in San Luis Obispo |
How much you'd need to earn in the other city to keep the same standard of living.
If you earn $100,000 in San Diego, you'd need $88,249 in San Luis Obispo to maintain your standard of living.
Climate, safety, and demographics side by side.
San Luis Obispo, CA is about 11.8% cheaper overall than San Diego, CA, based on our cost-of-living index. Housing costs are roughly 23% higher in San Diego than in San Luis Obispo. If you earn $80,000 in San Diego, you'd need about $70,599 in San Luis Obispo to keep the same standard of living.