City comparison
San Diego, CA is about 475 miles (750 km) from San Francisco, CA in a straight line. By road, the drive is roughly 600 miles, or about 10 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 San Diego, CA to San Francisco, CA takes about 57 min, covering roughly 475 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 851,036 in San Francisco — about 1.6× larger by population. By land area, San Diego covers about 325 sq mi vs 47 sq mi for San Francisco.
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 Francisco | Difference |
|---|---|---|---|
| Median rent | $2,080/mo | $2,316/mo | 11.3% higher in San Francisco |
| Median home value | $783,300 | $1,348,700 | 72.2% higher in San Francisco |
| Median household income | $98,657 | $136,689 | 38.5% higher in San Francisco |
| Groceries index | 107.6 | 103.9 | 3.5% higher in San Diego |
| Utilities index | 169.8 | 162.7 | 4.4% higher in San Diego |
| Transportation index | 100.0 | 102.0 | 2.0% higher in San Francisco |
| Healthcare index | 100.0 | 100.2 | ≈ equal (San Francisco slightly higher) |
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 $104,164 in San Francisco to maintain your standard of living.
Climate, safety, and demographics side by side.
San Diego, CA is about 4% cheaper overall than San Francisco, CA, based on our cost-of-living index. Housing costs are roughly 9% higher in San Francisco than in San Diego. If you earn $80,000 in San Diego, you'd need about $83,331 in San Francisco to keep the same standard of living.