City comparison
Philadelphia, PA is about 125 miles (200 km) from Rockville, MD in a straight line. By road, the drive is roughly 150 miles, or about 2 h 30 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 Philadelphia, PA to Rockville, MD takes about 15 min, covering roughly 125 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.
Philadelphia has a population of 1,593,208, vs 67,142 in Rockville — about 23.7× larger by population. By land area, Philadelphia covers about 135 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 | Philadelphia | Rockville | Difference |
|---|---|---|---|
| Median rent | $1,250/mo | $2,167/mo | 73.4% higher in Rockville |
| Median home value | $215,500 | $623,800 | 189.5% higher in Rockville |
| Median household income | $57,537 | $122,470 | 112.9% higher in Rockville |
| Groceries index | 97.0 | 104.3 | 7.5% higher in Rockville |
| Utilities index | 112.3 | 105.6 | 6.3% higher in Philadelphia |
| Transportation index | 101.7 | 102.2 | ≈ equal (Rockville slightly higher) |
| Healthcare index | 102.7 | 101.6 | 1.0% higher in Philadelphia |
How much you'd need to earn in the other city to keep the same standard of living.
If you earn $100,000 in Philadelphia, you'd need $116,921 in Rockville to maintain your standard of living.
Climate, safety, and demographics side by side.
Philadelphia, PA is about 14.5% cheaper overall than Rockville, MD, based on our cost-of-living index. Housing costs are roughly 37% higher in Rockville than in Philadelphia. If you earn $80,000 in Philadelphia, you'd need about $93,537 in Rockville to keep the same standard of living.