City comparison
Duluth, MN is about 550 miles (900 km) from Rapid City, SD in a straight line. By road, the drive is roughly 700 miles, or about 12 hours 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 Duluth, MN to Rapid City, SD takes about 1 h 8 min, covering roughly 550 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.
Duluth, MN is on Central Time and Rapid City, SD is on Mountain Time — a 1-hour difference. When it's noon in Duluth, it's 11 a.m. in Rapid City, which puts Duluth 1 hours ahead.
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.
Duluth has a population of 86,772, vs 75,632 in Rapid City — about 1.1× larger by population. By land area, Duluth covers about 72 sq mi vs 56 sq mi for Rapid City.
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 | Duluth | Rapid City | Difference |
|---|---|---|---|
| Median rent | $990/mo | $975/mo | 1.5% higher in Duluth |
| Median home value | $209,800 | $244,500 | 16.5% higher in Rapid City |
| Median household income | $63,545 | $62,784 | 1.2% higher in Duluth |
| Groceries index | 95.4 | 95.5 | ≈ equal (Rapid City slightly higher) |
| Utilities index | 87.7 | 80.2 | 9.3% higher in Duluth |
| Transportation index | 92.6 | 92.3 | ≈ equal (Duluth slightly higher) |
| Healthcare index | 92.8 | 92.5 | ≈ equal (Duluth 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 Duluth, you'd need $99,726 in Rapid City to maintain your standard of living.
Climate, safety, and demographics side by side.
Duluth and Rapid City have nearly identical overall cost-of-living indices. If you earn $80,000 in Duluth, you'd need about $79,781 in Rapid City to keep the same standard of living.