City comparison
Boulder, CO is about 30 miles (40 km) from Denver, CO in a straight line. By road, the drive is roughly 30 miles, or about 33 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 Boulder, CO to Denver, CO takes about 3 min, covering roughly 30 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.
Denver has a population of 710,800, vs 106,598 in Boulder — about 6.7× larger by population. By land area, Denver covers about 155 sq mi vs 27 sq mi for Boulder.
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 | Boulder | Denver | Difference |
|---|---|---|---|
| Median rent | $1,853/mo | $1,665/mo | 11.3% higher in Boulder |
| Median home value | $919,700 | $540,400 | 70.2% higher in Boulder |
| Median household income | $80,243 | $85,853 | 7.0% higher in Denver |
| Groceries index | 96.8 | 101.2 | 4.6% higher in Denver |
| Utilities index | 86.5 | 91.2 | 5.4% higher in Denver |
| Transportation index | 100.3 | 99.9 | ≈ equal (Boulder slightly higher) |
| Healthcare index | 100.2 | 99.9 | ≈ equal (Boulder slightly higher) |
How much you'd need to earn in the other city to keep the same standard of living.
If you earn $100,000 in Boulder, you'd need $97,214 in Denver to maintain your standard of living.
Climate, safety, and demographics side by side.
Denver, CO is about 2.8% cheaper overall than Boulder, CO, based on our cost-of-living index. Housing costs are roughly 7% higher in Boulder than in Denver. If you earn $80,000 in Boulder, you'd need about $77,771 in Denver to keep the same standard of living.