Transcontinental flights from Florida to California were a late development compared to flights from the northeast corridor to California.
Here is look at flights from Florida to California in January 1980 just as airline deregulation was being implemented and compare it to December 2015.
January 1980:
From Los Angeles
To Fort Lauderdale
National Airlines 1x day
Western Airlines 1x day (1-stop/Miami)
To Miami
National Airlines 4x day
Pan Am 1x day
Western Airlines 2x day (one flight continues to Fort Lauderdale)
To Tampa
National Airlines 2x day
From San Francisco
To Miami
Eastern Airlines 1x day
National Airlines 1x day
December 2015:
From Los Angeles
To Fort Lauderdale
JetBlue 2x day
Spirit 1x day
Virgin America 3x day
To Miami
American 8x day
Delta 1x day
To Orlando
American 2x day
Delta 3x day
Frontier 1x day
United 2x day
To Tampa
American 1x day
Delta 2x day
From San Diego
To Miami
American 2x day
To Orlando
Alaska 1x day
Southwest 1x day
From San Francisco
To Fort Lauderdale
JetBlue 2x day
United 1x day
Virgin America 1x day
To Miami
American 4x day
To Orlando
United 3x day
The Florida Squeeze 