kinda simple.
say u have a budget of £1k
lift pass is £250, so that leaves £750 for flights, accommodation and transfers
2 choices - package deal or diy
package - search Igloo, Sno, Crystal, Nielson, Thomson, Co-Op Ski, etc. with a limit of £750
diy:
Accommodation - unless you already know somewhere, then almost as crude as google resort + chalet/hotel (and info on their website would probably suggest best airport and potential transfer company)
flights - generally want Geneva or Lyon, so use Skyscanner to see prices from your UK airport to them
transfer - (depending where you want to go) but off the top of my head there's Alpybus, BensBus, Skiidy Gonzales, Snowbus, and google...
You might/should be able to get a diy that's cheaper than a package, but not always. Plus (as has happened to me a few times) - if your flight gets delayed then the package deal's transfer will wait for you, but a diy one wont as they have their own timetable... I've been stung with a 9 hour wait in Geneva in the past due to missing my bus and the day-long wait for a spare seat...
also check SCUK and Ski Club GB - both offer discounts for transfers, accommodation and even flights for their members - get the right combination and it soon pays for the membership on one of them (and then some - e.g. SCUK is £15/yr but can get 10% accommodation discount, so that's soon £50 off and an instant £35/head saving). Their discount pages are also a good idea for accommodation options if you're struggling to find options.