City comparison
San Diego, CA is about 425 miles (700 km) from Sunnyvale, CA in a straight line. By road, the drive is roughly 500 miles, or about 8 h 45 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 Sunnyvale, CA takes about 50 min, covering roughly 425 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 154,573 in Sunnyvale — about 9.0× larger by population. By land area, San Diego covers about 325 sq mi vs 22 sq mi for Sunnyvale.
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 | Sunnyvale | Difference |
|---|---|---|---|
| Median rent | $2,080/mo | $2,990/mo | 43.8% higher in Sunnyvale |
| Median home value | $783,300 | $1,680,700 | 114.6% higher in Sunnyvale |
| Median household income | $98,657 | $174,506 | 76.9% higher in Sunnyvale |
| Groceries index | 107.6 | 105.1 | 2.4% higher in San Diego |
| Utilities index | 169.8 | 153.8 | 10.4% higher in San Diego |
| Transportation index | 100.0 | 100.7 | 0.6% higher in Sunnyvale |
| Healthcare index | 100.0 | 100.6 | 0.6% higher in Sunnyvale |
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 $109,701 in Sunnyvale to maintain your standard of living.
Climate, safety, and demographics side by side.
San Diego, CA is about 8.8% cheaper overall than Sunnyvale, CA, based on our cost-of-living index. Housing costs are roughly 20% higher in Sunnyvale than in San Diego. If you earn $80,000 in San Diego, you'd need about $87,761 in Sunnyvale to keep the same standard of living.