City comparison
Brentwood, CA is about 425 miles (650 km) from Carlsbad, CA in a straight line. By road, the drive is roughly 500 miles, or about 8 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 Brentwood, CA to Carlsbad, CA takes about 50 min, covering roughly 425 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.
Carlsbad has a population of 114,745, vs 64,443 in Brentwood — about 1.8× larger by population. By land area, Carlsbad covers about 38 sq mi vs 15 sq mi for Brentwood.
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 | Brentwood | Carlsbad | Difference |
|---|---|---|---|
| Median rent | $2,451/mo | $2,477/mo | 1.1% higher in Carlsbad |
| Median home value | $735,500 | $1,070,500 | 45.5% higher in Carlsbad |
| Median household income | $134,689 | $134,139 | 0.4% higher in Brentwood |
| Groceries index | 107.4 | 107.6 | ≈ equal (Carlsbad slightly higher) |
| Utilities index | 165.3 | 169.8 | 2.7% higher in Carlsbad |
| Transportation index | 104.8 | 100.0 | 4.8% higher in Brentwood |
| Healthcare index | 104.8 | 100.0 | 4.8% higher in Brentwood |
How much you'd need to earn in the other city to keep the same standard of living.
If you earn $100,000 in Brentwood, you'd need $100,049 in Carlsbad to maintain your standard of living.
Climate, safety, and demographics side by side.
Brentwood and Carlsbad have nearly identical overall cost-of-living indices. Housing costs are roughly 2% higher in Carlsbad than in Brentwood. If you earn $80,000 in Brentwood, you'd need about $80,040 in Carlsbad to keep the same standard of living.