Below you can find travel information on past airport wait times for the different airports.
The recording of travel information at four of the airports included in the list (Detroit Metropolitan, Ontario International, Cincinnati/Northern Kentucky International and Minneapolis/St. Paul International) began in October, 2006 so past airport wait times travel information is available prior to that date. Seasonal monthly comparisons and date range comparisons of past airport wait times are the best ways to predict wait times.
Miami International Airport
Find past aiport wait times here - http://apps.cbp.gov/bwt/
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[...] time of day. Travel tips say the best way to predict future airport wait times is to reference the airport wait times for the most recent corresponding season. CBP provides public information for the past twelve [...]