Simplify the following text for a Grade 9 native English-speaking person.
Original: Regional airline service is branded as US Airways Express , operated by contract and subsidiary airline companies . As of December 2008 , US Airways , based in Tempe , Arizona , employed 33,765 people worldwide and operated 3,130 daily flights ( 1,312 US Airways Mainline , 1,818 US Airways Express as of December 2008 ) .
Simplified: Other companies operate short flights for US Airways , which are called US Airways Express .