City comparison
Austin, TX is about 700 miles (1,100 km) from O'Fallon, MO in a straight line. By road, the drive is roughly 900 miles, or about 15 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 Austin, TX to O'Fallon, MO takes about 1 h 25 min, covering roughly 700 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.
Austin has a population of 958,202, vs 91,825 in O'Fallon — about 10.4× larger by population. By land area, Austin covers about 325 sq mi vs 31 sq mi for O'Fallon.
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 | Austin | O'Fallon | Difference |
|---|---|---|---|
| Median rent | $1,549/mo | $1,311/mo | 18.2% higher in Austin |
| Median home value | $461,500 | $283,600 | 62.7% higher in Austin |
| Median household income | $86,556 | $104,863 | 21.2% higher in O'Fallon |
| Groceries index | 94.2 | 99.7 | 5.8% higher in O'Fallon |
| Utilities index | 83.2 | 71.9 | 15.7% higher in Austin |
| Transportation index | 96.6 | 98.5 | 1.9% higher in O'Fallon |
| Healthcare index | 96.1 | 98.7 | 2.7% higher in O'Fallon |
How much you'd need to earn in the other city to keep the same standard of living.
If you earn $100,000 in Austin, you'd need $84,715 in O'Fallon to maintain your standard of living.
Climate, safety, and demographics side by side.
O'Fallon, MO is about 15.3% cheaper overall than Austin, TX, based on our cost-of-living index. Housing costs are roughly 48% higher in Austin than in O'Fallon. If you earn $80,000 in Austin, you'd need about $67,772 in O'Fallon to keep the same standard of living.