City comparison
Philadelphia, PA is about 125 miles (200 km) from Potomac, MD in a straight line. By road, the drive is roughly 150 miles, or about 2 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 Philadelphia, PA to Potomac, MD takes about 16 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 46,499 in Potomac — about 34.3× larger by population. By land area, Philadelphia covers about 135 sq mi vs 25 sq mi for Potomac.
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 | Potomac | Difference |
|---|---|---|---|
| Median rent | $1,250/mo | $2,584/mo | 106.7% higher in Potomac |
| Median home value | $215,500 | $1,044,900 | 384.9% higher in Potomac |
| Median household income | $57,537 | $218,710 | 280.1% higher in Potomac |
| Groceries index | 97.0 | 104.3 | 7.5% higher in Potomac |
| Utilities index | 112.3 | 105.6 | 6.3% higher in Philadelphia |
| Transportation index | 101.7 | 102.2 | ≈ equal (Potomac 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 $118,107 in Potomac to maintain your standard of living.
Climate, safety, and demographics side by side.
Philadelphia, PA is about 15.3% cheaper overall than Potomac, MD, based on our cost-of-living index. Housing costs are roughly 39% higher in Potomac than in Philadelphia. If you earn $80,000 in Philadelphia, you'd need about $94,485 in Potomac to keep the same standard of living.