1.  In fact, the corporate arena may become the biggest travel battleground.

2.  The biggest travel impact is on the tour companies specializing in walking trips that offer an intimate and leisurely look at the countryside.

3.  US Travel and IVI Business Travel International, two of the biggest travel companies in the country, said Wednesday that they had merged to form BTI Americas Inc.

4.  While air fares are usually the biggest single travel expense, other costs add up.