Flight was a subtheme of Town based on planes and helicopters. The first set was released in 1987. But the theme wasn't reprised until 1991. The last new sets of Flight were introtroduced in 1996.
Most of the sets contained smaller aircraft. The most interesting sets of this theme were 6399 Airport Shuttle, which was one of only a few sets that made use of monorail tracks, 6346 Shuttle Launching Crew, which included a space shuttle and 6597 Century Skyway, which many people consider the best LEGO airport released to date.
Sets
The ThemeTable system is being renovated. See a list of pages tagged Flight here.
There is a forum about the work here
{{ThemeTable/renovations
|1817 Forest Flyer
|6331 Patriot Jet
|6341 Gas N' Go Flyer
|6342 Beach Rescue Chopper
|6346 Shuttle Launching Crew
|6515 Stunt Copter
|6536 Aero Hawk
|6597 Century Skyway
|6687 Turbo Prop I
}}