Why Is There No Way To Contact Us Airways By Phone At The Phila Airport?

The airlines don't give out telephone numbers at the airports because airport personnel have the huge responsibility of ensuring planes get loaded and flights depart on time. They're dealing with passengers face to face and handling numerous issues and deadlines. If they had to answer telephone calls from the public it would interfere with their job of handling flight operations. That's why airlines have reservations centers to take incoming calls and to answer any questions or requests for assistance from the customers including airport and baggage inquiries.