United Airlines seems to have the most dates with low fares around $200 round trip for Los Angeles LAX to Miami MIA or Orlando MCO. Delta competes on a lot of the dates and American Airlines has a few dates with the lowest fares at $187.
Departure dates: Lowest fares are primarily Monday, Tuesday and Wednesday beginning October 20 into second week of November; first two weeks of December; then from January 5 into mid-March, which are peak season winter dates for Miami, Florida.
Delta Airlines Los Angeles LAX – Miami MIA (nonstop flights)
$236.20 Tuesday February 16 – Friday February 19 (President’s Week)
United Airlines Los Angeles LAX – Orlando MCO (nonstop flights)
$196.20 Wednesday December 9 – Tuesday December 16
One of the best weeks of the year for low attendance at Disney Parks.
American Airlines Los Angeles LAX – Orlando MCO (nonstop flights)
$186.20 Friday October 30 – Wednesday November 4
These are recurring sales among the big alliance airlines since August for LAX routes to/from Orlando and Miami.