Oringinal itinerary all on one ticket: purchased direct from AC. BKK/NAR/YUL/MCO June 27th in Business Class with the YUL/MCO portion requiring an overnight stay. Flight arrives YUL at 16:40 PM and departs for MCO the next morning at 07;30 AM. Since it is difficult to get in touch with anyone at AC in order to ask them specifics about an itinerary change I will leave it up to the forum folks to provide guidance before proceeding. Would like to change the YUL/MCO flight to a 19:30 PM connecting flight that same evening instead of the next morning flight. If there is availablity on he 19:30 PM flight would it be probable and even adviseable that I could make the change and make it on line? Are there any drawbacks involved?

Thanks once again for any information provided

Dave