From snowy markets to sleeper trains: How I’m spending Christmas in Europe using points and miles

When TPG Senior Writer Ben Smithson alerted me to Air France-KLM Flying Blue’s July Promo Reward sale — flights from Denver International Airport (DEN) to Europe started at 15,000 Flying Blue miles each way — I was excited. Deals like this aren’t exactly rare, but most of them depart from either the East Coast or …