City comparison
San Diego, CA is about 2,600 miles (4,100 km) from Waltham, MA in a straight line. By road, the drive is roughly 3,200 miles, or about 53 hours (about 5 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 San Diego, CA to Waltham, MA takes about 5 h 8 min, covering roughly 2,600 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, CA is on Pacific Time and Waltham, MA is on Eastern Time — a 3-hour difference. When it's noon in San Diego, it's 3 p.m. in Waltham, which puts San Diego 3 hours behind.
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 64,711 in Waltham — about 21.4× larger by population. By land area, San Diego covers about 325 sq mi vs 13 sq mi for Waltham.
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 | San Diego | Waltham | Difference |
|---|---|---|---|
| Median rent | $2,080/mo | $2,141/mo | 2.9% higher in Waltham |
| Median home value | $783,300 | $679,000 | 15.4% higher in San Diego |
| Median household income | $98,657 | $113,443 | 15.0% higher in Waltham |
| Groceries index | 107.6 | 99.8 | 7.9% higher in San Diego |
| Utilities index | 169.8 | 144.3 | 17.7% higher in San Diego |
| Transportation index | 100.0 | 102.9 | 2.9% higher in Waltham |
| Healthcare index | 100.0 | 103.7 | 3.7% higher in Waltham |
How much you'd need to earn in the other city to keep the same standard of living.
If you earn $100,000 in San Diego, you'd need $89,836 in Waltham to maintain your standard of living.
Climate, safety, and demographics side by side.
Waltham, MA is about 10.2% cheaper overall than San Diego, CA, based on our cost-of-living index. Housing costs are roughly 18% higher in San Diego than in Waltham. If you earn $80,000 in San Diego, you'd need about $71,869 in Waltham to keep the same standard of living.