I like that idea. The links between each could double as public transportation for all, just include connections with existing metro stations. It would encourage the city to build around each of those nodes: put one in West LA, one DTLA, and one in the Valley, improve the one in Inglewood. The 405 from LAX to West LA and the 10 from West LA to DTLA are among two of the worst stretches in the country.
Though, people in for eg. West LA would have fits over the idea of airplanes flying over their sacred lands.
LA's airspace is already crazy as is. And the metro lines they are trying to put in are just, well, cute. Putting an international airport somewhere in Santa Monica would be silly. It's 20 miles away from LAX as is.
I mentioned the Valley, and having a West LA airport I don't find silly at all if it cuts LAX traffic in half, contingent on OP's idea of public transportation into and out of West LA relieving the 405 and the 10. OP's idea isn't to increase air traffic, it's to disperse it.
>Metro lines cute
Yes, that is also what OP was addressing. Faster lines between these theoretical airports, because metro is slow. These would double as public transportation for commuters. I'd love a straight shot with no stops from LAX to West LA to DTLA.
Yes, the Burbank airport is very nice and convenient. So is the Johnny Wayne one in Santa Ana. A bit further out, I also love the Palm Springs airport.
Though, people in for eg. West LA would have fits over the idea of airplanes flying over their sacred lands.