City comparison
Centennial, CO is about 1,600 miles (2,500 km) from Philadelphia, PA in a straight line. By road, the drive is roughly 2,000 miles, or about 33 hours (about 3 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 Centennial, CO to Philadelphia, PA takes about 3 h 9 min, covering roughly 1,600 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.
Centennial, CO is on Mountain Time and Philadelphia, PA is on Eastern Time — a 2-hour difference. When it's noon in Centennial, it's 2 p.m. in Philadelphia, which puts Centennial 2 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.
Philadelphia has a population of 1,593,208, vs 107,702 in Centennial — about 14.8× larger by population. By land area, Philadelphia covers about 135 sq mi vs 30 sq mi for Centennial.
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 | Centennial | Philadelphia | Difference |
|---|---|---|---|
| Median rent | $1,949/mo | $1,250/mo | 55.9% higher in Centennial |
| Median home value | $586,500 | $215,500 | 172.2% higher in Centennial |
| Median household income | $124,617 | $57,537 | 116.6% higher in Centennial |
| Groceries index | 101.2 | 97.0 | 4.3% higher in Centennial |
| Utilities index | 91.2 | 112.3 | 23.2% higher in Philadelphia |
| Transportation index | 99.9 | 101.7 | 1.8% higher in Philadelphia |
| Healthcare index | 99.9 | 102.7 | 2.8% 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 Centennial, you'd need $88,928 in Philadelphia to maintain your standard of living.
Climate, safety, and demographics side by side.
Philadelphia, PA is about 11.1% cheaper overall than Centennial, CO, based on our cost-of-living index. Housing costs are roughly 32% higher in Centennial than in Philadelphia. If you earn $80,000 in Centennial, you'd need about $71,142 in Philadelphia to keep the same standard of living.