Don't forget about Burbank Airport. * * * Cuts out all of the LA traffic and the Airport is serviced by a number of airlines.
I would say "cuts out 'more' or 'most' of the LA traffic", but not 'all', at least not every time. If you're anywhere in the LA basin, you always run the risk of traffic, at any time, and for any (or no) reason.
CaT