Skyline chairman Ken Matthews told shareholders the acquisition gives the company a "strong presence" on the West Coast and in Milford Sound, and is "consistent with the company's strategic goal of extending our activities in selected key locations."
"We see this opportunity as providing some means to achieve a greater presence for existing activities in Queenstown as well as reciprocal benefits for the newly acquired business," Matthews said.
The company will retain Totally Tourism's joint venture arrangements and keep the existing brands.
Totally Tourism caters to as many as 150,000 visitors annually through its helicopter, plane, cruise and property investments, according to Skyline's statement.
Skyline said it will update shareholders on the deal at its annual meeting on September 17.
Earlier this month, Skyline said the downturn in the tourism sector meant it had to recast its strategy to attract Chinese travellers, who are tipped to replace Americans as New Zealand's third-biggest market.
Skyline reported a bottom-line profit of $12.1 million, or 49 cents per share, in the 12 months ended March 31, compared to a $13.9 million, or 45 cents, a year earlier.
Shares of Skyline, which trade on the Unlisted platform were last at $6.10, valuing the company at $203.6 million.
Last year, Skyline turned down an undisclosed cash offer for its 50 per cent share in Christchurch casino from partner SkyCity Entertainment Group.