Complex sentence: After deregulation of the airline industry in 1978 the terminal and airfield were too small for the increased traffic; in 1983 airline flights moved to the new Southwest Florida Regional Airport, known today as Southwest Florida International Airport (RSW).
Split into simpler sentences: After deregulation of the airline industry in 1978, the terminal and airfield were too small for the increased traffic. In 1983, airline flights moved to the new Southwest Florida Regional Airport, known today as Southwest Florida International Airport (RSW).