A Banff chauffeur service is a reserved private car with a professional driver, priced as one fixed fare before travel, run by a licensed chauffeur operator that holds both a Parks Canada business licence under the National Parks of Canada Business Licence Regulations and a Town of Banff business licence. Banff has no commercial airport, so the core trip is a Calgary airport transfer to Banff of about 130 km. The same booking model covers hourly car service in the park, ski transfers and a Banff car service between hotels, restaurants and trailheads.
It is different from the airport bus in three ways. The car leaves when your flight lands, not on the next scheduled departure. It goes to the door you name, including Lake Louise, which the Banff Airporter does not serve. And it carries everything a family brings to the mountains in ski season. The fare quoted already contains the 5 percent GST. Alberta has no toll roads, so there is nothing else to add, except the Parks Canada park pass, which is an entry fee you buy yourself and is not part of any Banff taxi alternative fare.
Around that core sit the trips that justify a private vehicle: Calgary airport to Lake Louise direct to the Chateau, Banff to Canmore for dinner, Banff to Jasper along the Icefields Parkway, wedding transportation in Banff between ceremony and reception, and corporate retreat travel for teams flying into Calgary.