City comparison
Decatur, IL is about 150 miles (250 km) from Des Plaines, IL in a straight line. By road, the drive is roughly 200 miles, or about 3 h 15 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 Decatur, IL to Des Plaines, IL takes about 19 min, covering roughly 150 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.
Decatur has a population of 70,975, vs 60,087 in Des Plaines — about 1.2× larger by population. By land area, Decatur covers about 44 sq mi vs 14 sq mi for Des Plaines.
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 | Decatur | Des Plaines | Difference |
|---|---|---|---|
| Median rent | $770/mo | $1,300/mo | 68.8% higher in Des Plaines |
| Median home value | $96,800 | $304,100 | 214.2% higher in Des Plaines |
| Median household income | $49,039 | $86,552 | 76.5% higher in Des Plaines |
| Groceries index | 93.9 | 106.3 | 13.2% higher in Des Plaines |
| Utilities index | 91.2 | 84.3 | 8.1% higher in Decatur |
| Transportation index | 99.3 | 100.2 | 0.8% higher in Des Plaines |
| Healthcare index | 99.5 | 100.4 | 0.8% higher in Des Plaines |
How much you'd need to earn in the other city to keep the same standard of living.
If you earn $100,000 in Decatur, you'd need $131,128 in Des Plaines to maintain your standard of living.
Climate, safety, and demographics side by side.
Decatur, IL is about 23.7% cheaper overall than Des Plaines, IL, based on our cost-of-living index. Housing costs are roughly 96% higher in Des Plaines than in Decatur. If you earn $80,000 in Decatur, you'd need about $104,902 in Des Plaines to keep the same standard of living.