It's often worth it from both a time and cost perspective. You have many more nonstop flight choices, and nonstop flights substantially increase the likelihood that you'll get where you're going. I love arriving home after a trip to our cozy little BTV, but it's usually worth the drive to YUL. There are a number of hotels that do park and fly. If you have a morning flight, you can drive up, stay over, and take their shuttle to the airport. Most will even have your car shoveled out for you when you get back.