Give this site a try as it has a good round up of Heli operations and their details, locations and when winter picks up also specials and snow reports. Also a booking inquirey form if you are looking to see availability. For day tripping only your options are limited but Stellar Heli skiing has pretty incredible terrain and good pricing for single day trips.

http://www.heliskidirectory.com

Jason owns Stellar Heli Skiing so tell him that you heard of him through this site and he will take good care of you!

Most Heli companies only do multi day trips, then the Cat Skiing guys take the single day trips!

One of the few that I know do single day trips is RK out of Panorama.

http://www.rkheliski.com/daily.....h-columbia 

more should be here

http://www.heliskiingcanada.ca/

However, depending on where you are in BC I would definately look at some cat skiing ops. Tend to be cheaper, Less Danger, more of a relaxed atmosphere and most of the time more vertical!

If your interested in the Cat Side, here is a few i have tried and you should consider (again ranging in prices)

Island lake

Big Red Cats

Powder Stagecoach - Alberta

K3