City comparison
Petaluma, CA is about 2,400 miles (3,900 km) from Rockville, MD in a straight line. By road, the drive is roughly 3,000 miles, or about 51 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 Petaluma, CA to Rockville, MD takes about 4 h 51 min, covering roughly 2,400 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.
Petaluma, CA is on Pacific Time and Rockville, MD is on Eastern Time — a 3-hour difference. When it's noon in Petaluma, it's 3 p.m. in Rockville, which puts Petaluma 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.
Rockville has a population of 67,142, vs 59,682 in Petaluma — about 1.1× larger by population. By land area, Petaluma covers about 14 sq mi vs 14 sq mi for Rockville.
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 | Petaluma | Rockville | Difference |
|---|---|---|---|
| Median rent | $2,361/mo | $2,167/mo | 9.0% higher in Petaluma |
| Median home value | $805,800 | $623,800 | 29.2% higher in Petaluma |
| Median household income | $108,527 | $122,470 | 12.8% higher in Rockville |
| Groceries index | 105.1 | 104.3 | 0.7% higher in Petaluma |
| Utilities index | 152.1 | 105.6 | 44.0% higher in Petaluma |
| Transportation index | 100.7 | 102.2 | 1.5% higher in Rockville |
| Healthcare index | 100.6 | 101.6 | 1.0% higher in Rockville |
How much you'd need to earn in the other city to keep the same standard of living.
If you earn $100,000 in Petaluma, you'd need $99,992 in Rockville to maintain your standard of living.
Climate, safety, and demographics side by side.
Petaluma and Rockville have nearly identical overall cost-of-living indices. Housing costs are roughly 6% higher in Rockville than in Petaluma. If you earn $80,000 in Petaluma, you'd need about $79,994 in Rockville to keep the same standard of living.