Southwest announce route changes.

The Worlds largest low cost carrier Southwest Airlines has announced that it plans to cut flights between two city pairs.

On March 14 it will discontinue its once weekly service between its Philadelphia base and Austin, Texas. The carrier will also discontinue service between Nasville (BNA) and Ontario California.

It will also add new services between Chicago and Ontario and will add service from the East Coast airports of Long Island (ISP) to Fort Myers (RSW).