You probably want to be booking something quite soon. Those dates are over the American Thanksgiving holiday.

You can try looking at sites such as

www.expedia.com

www.travelocity.com

www.vacationstogo.com

Also Miami is an AA hub so maybe look at www.aa.com

I guess you need to decide if you want to book a package deal or hotel and flights separate. Look at the sites above and see what they have to offer.