City comparison
Round Rock, TX is about 90 miles (150 km) from San Antonio, TX 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 Round Rock, TX to San Antonio, TX takes about 11 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 Antonio has a population of 1,445,662, vs 120,465 in Round Rock — about 12.0× larger by population. By land area, San Antonio covers about 500 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 Antonio | Difference |
|---|---|---|---|
| Median rent | $1,586/mo | $1,189/mo | 33.4% higher in Round Rock |
| Median home value | $337,500 | $198,000 | 70.5% higher in Round Rock |
| Median household income | $91,888 | $59,593 | 54.2% higher in Round Rock |
| Groceries index | 94.2 | 94.2 | ≈ equal |
| Utilities index | 83.2 | 83.3 | ≈ equal (San Antonio slightly higher) |
| Transportation index | 96.6 | 96.6 | ≈ equal |
| Healthcare index | 96.1 | 96.1 | ≈ 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 Round Rock, you'd need $89,438 in San Antonio to maintain your standard of living.
Climate, safety, and demographics side by side.
San Antonio, TX is about 10.6% cheaper overall than Round Rock, TX, based on our cost-of-living index. Housing costs are roughly 28% higher in Round Rock than in San Antonio. If you earn $80,000 in Round Rock, you'd need about $71,551 in San Antonio to keep the same standard of living.