City comparison
Castle Rock, CO is about 800 miles (1,300 km) from San Diego, CA in a straight line. By road, the drive is roughly 1,000 miles, or about 17 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 Castle Rock, CO to San Diego, CA takes about 1 h 39 min, covering roughly 800 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.
Castle Rock, CO is on Mountain Time and San Diego, CA is on Pacific Time — a 1-hour difference. When it's noon in Castle Rock, it's 11 a.m. in San Diego, which puts Castle Rock 1 hours ahead.
Standard-time offsets. Daylight saving applies in both cities for most of the year (exceptions: Hawaii and most of Arizona), and the gap between the two stays the same.
San Diego has a population of 1,383,987, vs 74,065 in Castle Rock — about 18.7× larger by population. By land area, San Diego covers about 325 sq mi vs 35 sq mi for Castle Rock.
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 | Castle Rock | San Diego | Difference |
|---|---|---|---|
| Median rent | $1,810/mo | $2,080/mo | 14.9% higher in San Diego |
| Median home value | $577,500 | $783,300 | 35.6% higher in San Diego |
| Median household income | $135,985 | $98,657 | 37.8% higher in Castle Rock |
| Groceries index | 101.2 | 107.6 | 6.3% higher in San Diego |
| Utilities index | 91.2 | 169.8 | 86.2% higher in San Diego |
| Transportation index | 99.9 | 100.0 | ≈ equal (San Diego slightly higher) |
| Healthcare index | 99.9 | 100.0 | ≈ equal (San Diego slightly higher) |
How much you'd need to earn in the other city to keep the same standard of living.
If you earn $100,000 in Castle Rock, you'd need $117,998 in San Diego to maintain your standard of living.
Climate, safety, and demographics side by side.
Castle Rock, CO is about 15.3% cheaper overall than San Diego, CA, based on our cost-of-living index. Housing costs are roughly 21% higher in San Diego than in Castle Rock. If you earn $80,000 in Castle Rock, you'd need about $94,398 in San Diego to keep the same standard of living.