City comparison
Round Rock, TX is about 1,200 miles (1,900 km) from San Diego, CA in a straight line. By road, the drive is roughly 1,400 miles, or about 24 hours (about 2 days at 10 h/day) 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 Round Rock, TX to San Diego, CA takes about 2 h 19 min, covering roughly 1,200 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.
Round Rock, TX is on Central Time and San Diego, CA is on Pacific Time — a 2-hour difference. When it's noon in Round Rock, it's 10 a.m. in San Diego, which puts Round Rock 2 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 120,465 in Round Rock — about 11.5× larger by population. By land area, San Diego covers about 325 sq mi vs 38 sq mi for Round 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 | Round Rock | San Diego | Difference |
|---|---|---|---|
| Median rent | $1,586/mo | $2,080/mo | 31.1% higher in San Diego |
| Median home value | $337,500 | $783,300 | 132.1% higher in San Diego |
| Median household income | $91,888 | $98,657 | 7.4% higher in San Diego |
| Groceries index | 94.2 | 107.6 | 14.2% higher in San Diego |
| Utilities index | 83.2 | 169.8 | 104.1% higher in San Diego |
| Transportation index | 96.6 | 100.0 | 3.5% higher in San Diego |
| Healthcare index | 96.1 | 100.0 | 4.0% higher in San Diego |
How much you'd need to earn in the other city to keep the same standard of living.
If you earn $100,000 in Round Rock, you'd need $133,568 in San Diego to maintain your standard of living.
Climate, safety, and demographics side by side.
Round Rock, TX is about 25.1% cheaper overall than San Diego, CA, based on our cost-of-living index. Housing costs are roughly 47% higher in San Diego than in Round Rock. If you earn $80,000 in Round Rock, you'd need about $106,854 in San Diego to keep the same standard of living.