DENVER (AP) – Thanksgiving travel is an ordeal under the best of circumstances, and a one-two punch of bad weather threatens to make it even more exhausting. Airlines prepared to deal Tuesday with a forecast for heavy snow in Denver, canceling flights ahead of time and offering customers a chance to reschedule without racking up standard ticket-change fees. As that front moves through the Great Lakes and the Northeast later in the week, forecasters say another storm will crash into the West Coast, possibly fouling flights and making driving treacherous. The AAA auto club says more than 55 million people will travel at least 50 miles (81 kilometers) from home over Thanksgiving, and the Transportation Safety Administration is predicting record numbers at airports.