The bomber flown by Pete and Dorinda is the A-26 Invader, used by the Army Air Corps in WWII. Al flies the PBY Catalina, a Navy rescue and transport plane in WWII. Dorinda helps Al ferry a Cessna 337 Skymaster, also known as the O-2 when flown by the Air Force in Vietnam. Ted flies a Super Decathalon, an aerobatic airplane.
Although the training base in the movie was supposedly in Colorado, actual filming occurred at the Ephrata, WA Municipal Airport (KEPH) which is a former WWII B-17 training base. Many of the hangars at the airport are original from that era, and evidence of the base is still visible - foundations for buildings, plumbing, the roads and even rock lined walks to the foundations still exist unchanged in the desert. When John Goodman was doused with fire retardant, he was sitting on top of one of a series of earthen bunkers, and walking around the airport you can still see the red retardant stains on the earth. Dorinda's house was a shell built for the movie and sits abandoned at the airport edge. Overall a very interesting place to visit as everything is very well preserved in the desert.