City comparison
Idaho Falls, ID is about 1,200 miles (2,000 km) from San Antonio, TX 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 Idaho Falls, ID to San Antonio, TX takes about 2 h 27 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.
Idaho Falls, ID is on Mountain Time and San Antonio, TX is on Central Time — a 1-hour difference. When it's noon in Idaho Falls, it's 1 p.m. in San Antonio, which puts Idaho Falls 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.
San Antonio has a population of 1,445,662, vs 65,685 in Idaho Falls — about 22.0× larger by population. By land area, San Antonio covers about 500 sq mi vs 27 sq mi for Idaho Falls.
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 | Idaho Falls | San Antonio | Difference |
|---|---|---|---|
| Median rent | $931/mo | $1,189/mo | 27.7% higher in San Antonio |
| Median home value | $266,800 | $198,000 | 34.7% higher in Idaho Falls |
| Median household income | $66,463 | $59,593 | 11.5% higher in Idaho Falls |
| Groceries index | 96.9 | 94.2 | 2.9% higher in Idaho Falls |
| Utilities index | 74.6 | 83.3 | 11.6% higher in San Antonio |
| Transportation index | 99.5 | 96.6 | 2.9% higher in Idaho Falls |
| Healthcare index | 99.4 | 96.1 | 3.5% higher in Idaho Falls |
How much you'd need to earn in the other city to keep the same standard of living.
If you earn $100,000 in Idaho Falls, you'd need $104,696 in San Antonio to maintain your standard of living.
Climate, safety, and demographics side by side.
Idaho Falls, ID is about 4.5% cheaper overall than San Antonio, TX, based on our cost-of-living index. Housing costs are roughly 14% higher in San Antonio than in Idaho Falls. If you earn $80,000 in Idaho Falls, you'd need about $83,757 in San Antonio to keep the same standard of living.