City comparison
Fremont, CA is about 10 miles (10 km) from Union City, CA in a straight line. By road, the drive is roughly 10 miles, or about 11 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 Fremont, CA to Union City, CA takes about 1 min, covering roughly 10 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.
Fremont has a population of 228,795, vs 69,502 in Union City — about 3.3× larger by population. By land area, Fremont covers about 78 sq mi vs 19 sq mi for Union 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 | Fremont | Union City | Difference |
|---|---|---|---|
| Median rent | $2,824/mo | $2,593/mo | 8.9% higher in Fremont |
| Median home value | $1,231,500 | $1,006,600 | 22.3% higher in Fremont |
| Median household income | $169,023 | $138,013 | 22.5% higher in Fremont |
| Groceries index | 108.1 | 108.1 | ≈ equal |
| Utilities index | 168.3 | 168.3 | ≈ equal |
| Transportation index | 106.1 | 106.1 | ≈ equal |
| Healthcare index | 106.0 | 106.0 | ≈ equal |
How much you'd need to earn in the other city to keep the same standard of living.
If you earn $100,000 in Fremont, you'd need $99,542 in Union City to maintain your standard of living.
Climate, safety, and demographics side by side.
Union City, CA is about 0.5% cheaper overall than Fremont, CA, based on our cost-of-living index. If you earn $80,000 in Fremont, you'd need about $79,633 in Union City to keep the same standard of living.