Some of the best holiday markets in Europe are found in picturesque Prague, arguably one of the best places in the world to spend Christmas. Over in Scotland, Edinburgh celebrates the season with Hogmanay, a three-day festival of musical performances, public dance, food, and—yes—fireworks. Quebec City, meanwhile, lays on the romance: you’ll find couples riding horse-drawn carriages and ducking into low-lit cafés for hot cocoa. One of Germany’s largest Christmas markets is found in Frankfurt, surprisingly one of this month’s most affordable places to travel. Those interested in saving should also look to Las Vegas, where hotel prices plummet with the oncoming holidays. Hoping to flee the cold weather? A trip to sunny beach getaways like Hawaii’s Big Island, Mexico, or the Bahamas will surely cure any winter woe. Better yet, avoid the sand altogether at balmy spots like Siem Reap (where dry season spells clear skies) or Florida’s Everglades, a mecca for wildlife enthusiasts with its...