This tiny airline lets you skip TSA and fly between small airports for less

I had never before been to an airport where I could arrive 20 minutes before my flight, park for free, walk straight into the terminal and board a nine-seat plane without passing through the typical commercial airport security process.But that's exactly what happened when I flew SeaPort Airlines between Spokane, Washington, and Seattle this summer.What is SeaPort?"Please don't tell anyone about this," fellow passenger Ken Batali pleaded, moments after we disembarked a SeaPort Airlines Pilatus PC-12 turboprop plane, grabbed our bags off the cart and walked through a silent terminal to an empty curb.Along with five other passengers — more people than usual, according to our pilot — we had flown on one of SeaPort's fairly new scheduled flights between Felts Field (SFF) airport in Spokane, Washington, and King County International Airport - Boeing Field (BFI), just 5 miles south of downtown Seattle.Instead of flying from Seattle-Tacoma International Airport (SEA) to Spokane International Airport (GEG), SeaPort Airlines operates between smaller general aviation airports (which primarily serve private, corporate, charter and other non-major-airline flights); these airports are often much...