City comparison
Fullerton, CA is about 90 miles (150 km) from San Diego, CA in a straight line. By road, the drive is roughly 100 miles, or about 1 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 Fullerton, CA to San Diego, CA takes about 10 min, covering roughly 90 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 142,280 in Fullerton — about 9.7× larger by population. By land area, San Diego covers about 325 sq mi vs 22 sq mi for Fullerton.
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 | Fullerton | San Diego | Difference |
|---|---|---|---|
| Median rent | $1,989/mo | $2,080/mo | 4.6% higher in San Diego |
| Median home value | $791,000 | $783,300 | 1.0% higher in Fullerton |
| Median household income | $99,279 | $98,657 | 0.6% higher in Fullerton |
| Groceries index | 106.4 | 107.6 | 1.1% higher in San Diego |
| Utilities index | 155.6 | 169.8 | 9.2% higher in San Diego |
| Transportation index | 104.4 | 100.0 | 4.3% higher in Fullerton |
| Healthcare index | 104.3 | 100.0 | 4.3% higher in Fullerton |
How much you'd need to earn in the other city to keep the same standard of living.
If you earn $100,000 in Fullerton, you'd need $102,750 in San Diego to maintain your standard of living.
Climate, safety, and demographics side by side.
Fullerton, CA is about 2.7% cheaper overall than San Diego, CA, based on our cost-of-living index. Housing costs are roughly 5% higher in San Diego than in Fullerton. If you earn $80,000 in Fullerton, you'd need about $82,200 in San Diego to keep the same standard of living.