Corporate Travel Management is on track to become one of the 10 largest corporate travel agencies in the huge United States market after acquiring Boston-based Travizon Travel for at least $28 million.

The deal, to be financed through a 50-50 combination of cash and CTM shares, will take the Brisbane-based company's total transaction value in North America to $US1 billion ($1.3 billion) in the 2016-17 financial year. That would make CTM one of the largest corporate travel agents in the US just four years after it first entered that market.