City comparison
San Diego, CA is about 450 miles (700 km) from Walnut Creek, CA in a straight line. By road, the drive is roughly 550 miles, or about 9 h 15 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 Walnut Creek, CA takes about 54 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 69,809 in Walnut Creek — about 19.8× larger by population. By land area, San Diego covers about 325 sq mi vs 20 sq mi for Walnut Creek.
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 | Walnut Creek | Difference |
|---|---|---|---|
| Median rent | $2,080/mo | $2,503/mo | 20.3% higher in Walnut Creek |
| Median home value | $783,300 | $972,800 | 24.2% higher in Walnut Creek |
| Median household income | $98,657 | $129,971 | 31.7% higher in Walnut Creek |
| Groceries index | 107.6 | 108.1 | ≈ equal (Walnut Creek slightly higher) |
| Utilities index | 169.8 | 168.3 | 0.9% higher in San Diego |
| Transportation index | 100.0 | 106.1 | 6.0% higher in Walnut Creek |
| Healthcare index | 100.0 | 106.0 | 6.0% higher in Walnut Creek |
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 $106,470 in Walnut Creek to maintain your standard of living.
Climate, safety, and demographics side by side.
San Diego, CA is about 6.1% cheaper overall than Walnut Creek, CA, based on our cost-of-living index. Housing costs are roughly 10% higher in Walnut Creek than in San Diego. If you earn $80,000 in San Diego, you'd need about $85,176 in Walnut Creek to keep the same standard of living.