City comparison
Petaluma, CA is about 475 miles (800 km) from San Diego, CA in a straight line. By road, the drive is roughly 600 miles, or about 10 hours 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 Petaluma, CA to San Diego, CA takes about 58 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 59,682 in Petaluma — about 23.2× larger by population. By land area, San Diego covers about 325 sq mi vs 14 sq mi for Petaluma.
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 | Petaluma | San Diego | Difference |
|---|---|---|---|
| Median rent | $2,361/mo | $2,080/mo | 13.5% higher in Petaluma |
| Median home value | $805,800 | $783,300 | 2.9% higher in Petaluma |
| Median household income | $108,527 | $98,657 | 10.0% higher in Petaluma |
| Groceries index | 105.1 | 107.6 | 2.4% higher in San Diego |
| Utilities index | 152.1 | 169.8 | 11.7% higher in San Diego |
| Transportation index | 100.7 | 100.0 | 0.6% higher in Petaluma |
| Healthcare index | 100.6 | 100.0 | 0.6% higher in Petaluma |
How much you'd need to earn in the other city to keep the same standard of living.
If you earn $100,000 in Petaluma, you'd need $113,078 in San Diego to maintain your standard of living.
Climate, safety, and demographics side by side.
Petaluma, CA is about 11.6% cheaper overall than San Diego, CA, based on our cost-of-living index. Housing costs are roughly 24% higher in San Diego than in Petaluma. If you earn $80,000 in Petaluma, you'd need about $90,463 in San Diego to keep the same standard of living.