City comparison
Dallas, TX is about 1,200 miles (1,900 km) from Gaithersburg, MD in a straight line. By road, the drive is roughly 1,500 miles, or about 25 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 Dallas, TX to Gaithersburg, MD takes about 2 h 21 min, covering roughly 1,200 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 Gaithersburg, MD is on Eastern Time — a 1-hour difference. When it's noon in Dallas, it's 1 p.m. in Gaithersburg, which puts Dallas 1 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.
Dallas has a population of 1,300,642, vs 69,016 in Gaithersburg — about 18.8× larger by population. By land area, Dallas covers about 340 sq mi vs 10 sq mi for Gaithersburg.
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 | Gaithersburg | Difference |
|---|---|---|---|
| Median rent | $1,305/mo | $1,925/mo | 47.5% higher in Gaithersburg |
| Median home value | $270,700 | $472,800 | 74.7% higher in Gaithersburg |
| Median household income | $63,985 | $104,544 | 63.4% higher in Gaithersburg |
| Groceries index | 101.7 | 103.8 | 2.0% higher in Gaithersburg |
| Utilities index | 89.3 | 106.4 | 19.2% higher in Gaithersburg |
| Transportation index | 98.5 | 102.0 | 3.5% higher in Gaithersburg |
| Healthcare index | 99.7 | 101.5 | 1.8% higher in Gaithersburg |
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 $113,741 in Gaithersburg to maintain your standard of living.
Climate, safety, and demographics side by side.
Dallas, TX is about 12.1% cheaper overall than Gaithersburg, MD, based on our cost-of-living index. Housing costs are roughly 24% higher in Gaithersburg than in Dallas. If you earn $80,000 in Dallas, you'd need about $90,993 in Gaithersburg to keep the same standard of living.