I'd second those recommending Salt Lake City - the SLC areas are a great choice to minimize cost and maximize slope time on some of North America's best mountains. The city is served by a quite a number of airlines including Southwest which will almost certainly be the least expensive once you add in the cost of luggage (which is free on SW for 2 checked bags - one of which can be skis). Staying at budget hotel in SLC (really Midvale/Sandy) will be the cheapest option but will mean a bit of a ride to any of the 4 Cottonwood Canyon resorts. Discount lift tickets can be gotten for all of the resorts through Liftopia or at almost any outdoor/ski shop in SLC. Keep in mind that you can't get discounted tickets at the resorts (also true for Park City). There is also the SkiUtah promo for a nearly half-price ticket based on your boarding pass for Alto or Snobird. Only good for the first 24 hrs of your stay and you have to pre-register at www.alta.com/boardingpass or www.snowbird.com/boardingpass
There are more options in Park City on the other side of the Wasatch, but the cost is likely to be somewhat higher. One benefit of staying in PC though is that its a nice little town to spend your evenings in, with a fair number of decent eating and drinking places. Another benefit is that you can literally ski into (and take the lift out of) town. Canyons (or whatever they now plan to call themselves) and Deer Valley are within a few miles of PC as well. If you plan on a car and don't mind driving a little a little, you can find some very nice and very reasonably priced condos just outside of Park City proper. Check VRBO. The only real downside is that the snow is generally better on the windward side of the range.
If you are not swayed by the combination of convenience, great skiing and low cost and are set on Big Sky, you can either fly into Bozeman - which is not particularly cheap, nor are there lots of choices - or fly to SLC and drive up (~400 mi). There are a number of lodging options at Big Sky, many of which are pretty easy walking distance to the lifts.While there are plenty of restaurants and bars at BS, and some more a few miles down the mountain at the Meadows, nightlife is not like Vail, Aspen or even Park City. Not a big deal for me, but can be for others. Since I don't care about nightlife, my preference is BS's sister resort on the other side of Lone Mountain, Moonlight Basin. Slightly smaller than BS but still has great terrain and so few people (not that BS is crowded) that the mountain feels like your own private resort. Lodging options are more limited though and can be much more expensive. Still, you may be able to find a relatively reasonably priced condo there if you do a bit of searching.
Snowfall in both the Wasatch and the Spanish Peaks has not been particularly abundant so far this year - looks like many of the bigger accumulations have been in parts of CO and WY. Conditions can change for the better pretty rapidly however and your trip dates are far enough in the future that you should be fine. Best of luck.
Edited by CharlieRN - 12/5/14 at 9:49am