There is a low fare available between Los Angeles LAX and Miami MIA at $83 to $103 each way on American or $92 one way on United. Delta is a low fare $114 each way.
This is for Tuesday and Wednesday departures with a few Saturday dates in April and May and a couple of dates in June. There are more dates with low fares flying LAX to MIA than MIA to LAX.
AA raises the fare to $143 in June. United has a couple of $92 dates in June and a couple of dates matching AA at $143, but mostly $166 and higher. Delta has more low fare dates in June and July at $114 to $135 each way.
American Airlines Miami – Los Angeles – Miami (nonstop flights)
$166.20 Wed April 27 – Wed May 3
MIA-LAX-MIA = 4,684 flight miles.
United Airlines
Miami – Houston – Los Angeles – Houston – Miami (one stop)
$183.20 Wed May 4 – Tue May 10
Loyalty Traveler curated Airfare Deals and Google Flights and Kayak Explore tutorials.