Summer business travel demand is steady going into the summer even has leisure travel has softened, travel companies said.

Lowest airfares range from as little as $75 to as much as $503 for economy-class tickets to popular U.S. and European destinations this summer flying ... the consumer travel trends expert ...

Delta is also increasing service between Austin and several Florida cities. Planning your summer vacation ... to twice daily this winter during peak travel season, the company said.