My flight is scheduled for 7 p.m. from New York.
My flight is scheduled for New York at 7 p.m.
My flight is scheduled for New York, 7 p.m.
One cannot tell whether they have the same meaning, because none of them are clear enough; mainly because none specifies whether the time mentioned is a departure or arrival time. To make it clear, include "scheduled to depart" or "scheduled to arrive". (That is, if you actually want to be met at your destination city, when you arrive, rather than at your departure city, when you depart.) If your flight is bound "for" New York, it would be clear to say "my flight TO New York". (These are not the kind of instructions you would give to someone you wanted to drop you off at the airport; they know which city you are departing from.)