City comparison
Castro Valley, CA is about 450 miles (700 km) from San Diego, CA in a straight line. By road, the drive is roughly 550 miles, or about 9 h 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 Castro Valley, CA to San Diego, CA takes about 53 min, covering roughly 450 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 65,444 in Castro Valley — about 21.1× larger by population. By land area, San Diego covers about 325 sq mi vs 17 sq mi for Castro Valley.
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 | Castro Valley | San Diego | Difference |
|---|---|---|---|
| Median rent | $2,383/mo | $2,080/mo | 14.6% higher in Castro Valley |
| Median home value | $1,013,900 | $783,300 | 29.4% higher in Castro Valley |
| Median household income | $132,174 | $98,657 | 34.0% higher in Castro Valley |
| Groceries index | 108.1 | 107.6 | ≈ equal (Castro Valley slightly higher) |
| Utilities index | 168.3 | 169.8 | 0.9% higher in San Diego |
| Transportation index | 106.1 | 100.0 | 6.0% higher in Castro Valley |
| Healthcare index | 106.0 | 100.0 | 6.0% higher in Castro Valley |
How much you'd need to earn in the other city to keep the same standard of living.
If you earn $100,000 in Castro Valley, you'd need $94,150 in San Diego to maintain your standard of living.
Climate, safety, and demographics side by side.
San Diego, CA is about 5.9% cheaper overall than Castro Valley, CA, based on our cost-of-living index. Housing costs are roughly 9% higher in Castro Valley than in San Diego. If you earn $80,000 in Castro Valley, you'd need about $75,320 in San Diego to keep the same standard of living.