City comparison
Gaithersburg, MD is about 125 miles (200 km) from Philadelphia, PA 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 Gaithersburg, MD to Philadelphia, PA 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 69,016 in Gaithersburg — about 23.1× larger by population. By land area, Philadelphia covers about 135 sq mi vs 10 sq mi for Gaithersburg.
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 | Gaithersburg | Philadelphia | Difference |
|---|---|---|---|
| Median rent | $1,925/mo | $1,250/mo | 54.0% higher in Gaithersburg |
| Median home value | $472,800 | $215,500 | 119.4% higher in Gaithersburg |
| Median household income | $104,544 | $57,537 | 81.7% higher in Gaithersburg |
| Groceries index | 103.8 | 97.0 | 7.0% higher in Gaithersburg |
| Utilities index | 106.4 | 112.3 | 5.6% higher in Philadelphia |
| Transportation index | 102.0 | 101.7 | ≈ equal (Gaithersburg slightly higher) |
| Healthcare index | 101.5 | 102.7 | 1.2% 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 Gaithersburg, you'd need $88,168 in Philadelphia to maintain your standard of living.
Climate, safety, and demographics side by side.
Philadelphia, PA is about 11.8% cheaper overall than Gaithersburg, MD, based on our cost-of-living index. Housing costs are roughly 29% higher in Gaithersburg than in Philadelphia. If you earn $80,000 in Gaithersburg, you'd need about $70,534 in Philadelphia to keep the same standard of living.