Per google Ai - For international flights to Mexico, the sweet spot to book is typically 45 to 68 days (about 1.5 to 2.5 months) before your departure date, although some experts suggest looking 2-3 months out and buying within that timeframe. You should start your search for flights for March travel around December or January to find the best deals.
This is an all inclusive / family friendly resort! please use our link to book your stay to get a discount (and so the resort knows you are here for our wedding )