In general, when looking for the cheapest flight to Miami, try to choose a flight departing in February for the best deal.
In general, most flyers find the cheapest time to book a flight to Miami is about 18 days prior.
In general, booking your departure to Miami for a Monday represents the best deal on airfare. Try to avoid a Saturday departure to stay away from the highest prices.
Generally, when visiting Miami, evening flights represent the best value. morning flights are likely to have higher prices.