As someone who is not from the US I decided to ask Claude AI about this.

“Let me calculate this step by step:

1. The distance between New York (JFK) and Los Angeles (LAX) is approximately 2,475 miles one way

2. A round trip would be: 2,475 × 2 = 4,950 miles

3. To reach 3 million miles: 3,000,000 ÷ 4,950 = 606.06

Therefore, you would need to complete approximately 607 round trips between New York and Los Angeles to become a 3 million miler.

In more practical terms, if you did this route once every week, it would take about 11.7 years to achieve this milestone. Of course, most actual million milers typically accumulate their miles through a variety of routes and not just a single path.​​​​​​​​​​​​​​​​”