@Alpha
As Rockape says, most deals are Sat/Sun->Sat/Sun so I think, while you’ll no doubt find a “deal” searching around, it’ll be relatively expensive compared to a weekend-to-weekend deal as these are based on empty seats on charter flights which are all flying anyway, whether full or not. There are few (if any) charter planes doing the days you want. So, you’re stuck with scheduled airlines.
I’d advise being a bit more creative with your flight choices. Thu/Fri out Sun/Mon back will be pricey and all the cheap seats will be gone. Can you take a few days off and do, say Sat out and Wed in? You’d benefit from having only one busy day on the slopes and Mon/Tues/Wed will be relatively quiet? e.g. we got flights for £65ish from Brizzle to Geneva Sat pm out, Wed pm return for a “weekend” in March. Thu/Fri to Sun/Mon options were coming in much more expensive.
Accommodation is best booked on hotels.com/booking.com/airbnb.
I suppose the key is that anyone doing ski-weekend deals is looking to make a few quid out of you. Whereas, with a bit of google-fu you can probably sort yourself out with something.