Tis the season of long airport security lines, weary travelers and cancelled flights (hopefully we didn't just jinx ourselves with that one), not to mention your own brood of cranky kids. "For many parents, flying with kids is stressful and often feels interminable. And it can be. But it doesn't have to be," says Sarah Gavin, VP of global communications at Expedia and a mother of four. To help keep your composure and your sanity throughout this oh-so-merry season of travel, we sought the advice of bloggers and travel-industry professionals who are seasoned travelers and parents as well. Use their tips to get as prepared as possible so you can actually sit back, relax and enjoy your holiday flight for once.