Schedule is the correct spelling, yes.
Some example sentences for you are:
I will look at my schedule.
Sorry, my schedule is fully booked up.
I will schedule a meeting for next Thursday.
"horaire"
The correct spelling is schedule.
The likely word is schedule (timetable or itinerary).
The correct spelling is schedule (itinerary, time plan).
The correct spelling is schedule (itinerary, time plan).
A schedule may be an itinerary.
The correct spelling is schedule (timetable or itinerary).
The likely word is the noun "schedule" (a timetable or itinerary).
The correct spelling is "routine" (a regular schedule, or ordinary).
The hyphenated form "on-track" is used as an adjective to mean on schedule or properly proceeding.
This is likely the word "itinerary" (a schedule or plan of a journey).
CALENDAR : a list of days or months, a schedule (cannot be spelled -er)