Complex sentence: Air California, later AirCal, began as an intrastate regional airline operating mainline jet and turboprop aircraft and serving different points in the state of California and in later years a number of destinations neighboring western U.S. states as well.
Split into simpler sentences: Air California, later AirCal, began as an intrastate regional airline operating mainline jet and turboprop aircraft. The air carrier served different points in the state of California and in later years a number of destinations in neighboring western U.S. states as well.