City comparison
El Cajon, CA is about 10 miles (20 km) from San Diego, CA in a straight line. By road, the drive is roughly 10 miles, or about 13 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 El Cajon, CA to San Diego, CA takes about 1 min, covering roughly 10 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 105,721 in El Cajon — about 13.1× larger by population. By land area, San Diego covers about 325 sq mi vs 15 sq mi for El Cajon.
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 | El Cajon | San Diego | Difference |
|---|---|---|---|
| Median rent | $1,686/mo | $2,080/mo | 23.4% higher in San Diego |
| Median home value | $593,500 | $783,300 | 32.0% higher in San Diego |
| Median household income | $64,128 | $98,657 | 53.8% higher in San Diego |
| Groceries index | 107.6 | 107.6 | ≈ equal |
| Utilities index | 169.8 | 169.8 | ≈ equal |
| Transportation index | 100.0 | 100.0 | ≈ equal |
| Healthcare index | 100.0 | 100.0 | ≈ equal |
How much you'd need to earn in the other city to keep the same standard of living.
If you earn $100,000 in El Cajon, you'd need $100,847 in San Diego to maintain your standard of living.
Climate, safety, and demographics side by side.
El Cajon, CA is about 0.8% cheaper overall than San Diego, CA, based on our cost-of-living index. Housing costs are roughly 2% higher in San Diego than in El Cajon. If you earn $80,000 in El Cajon, you'd need about $80,678 in San Diego to keep the same standard of living.