Many airports across the globe offer options for travelers who need to spend the night during a layover. Some airports have on-site hotels, while others offer sleeping pods or lounges with comfortable seating. Two of the best airports for an overnight layover are Reykjavik and Keflavik airports in Iceland since it's a logical stopover spot on your way to and from the US. Icelandair offers multi-day stopovers, letting you explore the beautiful country of Iceland. It's important to check the airport's website or contact customer service for specific overnight stay policies or procedures.