City comparison
Dallas, TX is about 650 miles (1,100 km) from Thornton, CO in a straight line. By road, the drive is roughly 850 miles, or about 14 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 Dallas, TX to Thornton, CO takes about 1 h 20 min, covering roughly 650 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.
Dallas, TX is on Central Time and Thornton, CO is on Mountain Time — a 1-hour difference. When it's noon in Dallas, it's 11 a.m. in Thornton, which puts Dallas 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.
Dallas has a population of 1,300,642, vs 141,799 in Thornton — about 9.2× larger by population. By land area, Dallas covers about 340 sq mi vs 37 sq mi for Thornton.
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 | Dallas | Thornton | Difference |
|---|---|---|---|
| Median rent | $1,305/mo | $1,758/mo | 34.7% higher in Thornton |
| Median home value | $270,700 | $445,200 | 64.5% higher in Thornton |
| Median household income | $63,985 | $95,064 | 48.6% higher in Thornton |
| Groceries index | 101.7 | 101.2 | ≈ equal (Dallas slightly higher) |
| Utilities index | 89.3 | 91.2 | 2.2% higher in Thornton |
| Transportation index | 98.5 | 99.9 | 1.4% higher in Thornton |
| Healthcare index | 99.7 | 99.9 | ≈ equal (Thornton 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 Dallas, you'd need $112,231 in Thornton to maintain your standard of living.
Climate, safety, and demographics side by side.
Dallas, TX is about 10.9% cheaper overall than Thornton, CO, based on our cost-of-living index. Housing costs are roughly 25% higher in Thornton than in Dallas. If you earn $80,000 in Dallas, you'd need about $89,785 in Thornton to keep the same standard of living.