Absolutely, there are a number of tour operators who offer aurora borealis-viewing trips out of Yellowknife. Aurora Village (http://www.auroravillage.com) organizes two- to four-hour trips starting at 9 p.m. Their cheapest package costs CAD$120 per person. Beck's Kennels (http://www.beckskennels.com) offers one- to three-night packages that include aurora tours with airport transfers to and from your hotel in Yellowknife (the one-night package starts at CAD$185). You might also want to check with your hotel in case they have any discount packages or particular recommendations.