If you have a long layover or (God forbid) a delay, it can put a damper on any travel experience. Fortunately, quite a few U.S. airports now empathize with that struggle and have ramped up amenities in recent years. Several large hubs are appeasing beleaguered travelers with perks, including pools in New York, restaurant concepts from James Beard Award-winning chefs in Houston, access to therapy animals in San Francisco and even a movie theater in Portland. None of it requires lounge access, either. We looked into the best ones at some of the nation's biggest airports, most known as hubs for connecting flights, to bring you the best options to consider when booking your next flight.