Antonyms of adj unscheduled

1 sense of unscheduled

Sense 1
unscheduled (vs. scheduled) -- (not scheduled or not on a regular schedule; "an unscheduled meeting"; "the plane made an unscheduled stop at Gander for refueling")

scheduled (vs. unscheduled) -- (planned or scheduled for some certain time or times; "the scheduled meeting"; "the scheduled flights had to be cancelled because of snow")
        => regular -- (regularly scheduled for fixed times; "at a regular meeting of the PTA"; "regular bus departures")

Similarity of adj unscheduled

1 sense of unscheduled

Sense 1
unscheduled (vs. scheduled) -- (not scheduled or not on a regular schedule; "an unscheduled meeting"; "the plane made an unscheduled stop at Gander for refueling")
       => extra, special -- (added to a regular schedule; "a special holiday flight"; "put on special buses for the big game")
       => forced -- (made necessary by an unexpected situation or emergency; "a forced landing")