A million miles is a lot. If you flew roundtrip from New York to London twice a month, it would take over 6 years to have flown a million miles: http://www.gcmap.com/mapui?P=JFK-LON
You don't need to fly close to a million miles to get a million "miles"/points. Miles are based on spend now, not on distance traveled, so it's easy to rack up a million when you're flying business or first class.
As an example, let's say you're a regular business traveler flying a $5k business class round-trip from NYC to London on American Airlines. You have the highest status level which gives you a 120% bonus on miles earned. Each dollar spent on the flight thus earns you 11 miles, so that one round-trip is worth 55k miles. Source: https://www.aa.com/i18n/aadvantage-program/miles/aadvantage-...
But wait, there's more. Of course you also bought the $5k flight on your AA credit card, which gives another 2 miles per dollar spent, which puts the total up to 65k miles earned for one 7k mile round-trip flight. Or maybe you put it on your Chase Sapphire Reserve card, which gives you 3X Chase Ultimate Rewards points for travel spending, so 55k AA miles + 15k UR points. Now imagine that you're doing this trip several times per month and the miles/points add up very quickly; you can get to a million in no time.
What airlines include card miles in your million miles count? Having a million miles is different from the million miles status which seems to be based on the first kind of miles you mentioned.
That wasn't the asked question though. And getting a million flown miles isn't all it's cracked up to be; you get a lower level of status guaranteed for life, but given that you're still actively traveling frequently for business you're gonna have a much better level of status anyway. And it all depends on the airline anyway.
American Airlines, for example, only gives you gold status (the lowest level) for life at 1M miles.
Delta did lifetime silver for 1M miles, which was their lowest level. They did give a nice Tumi suitcase at the 1M (or was it 2M?) actual miles mark, but I don't think it does much outside of a normal high status... probably zone one boarding, or something like that. Once you hit diamond status, upgrades domestically were pretty common. International... not so much. The flexibility was the really nice thing - they always would go out of their way to get you on the route you wanted if possible.
With status multipliers (but flying meat space), the most I ever hit was 623k miles in a year. I suspect it was close to 300k 'real' miles. Our travel person was booking 'round the world' tickets to save money at that point.
