Just booked US-MIA-BOG RT for 2 adults, 1 child, 1 lap infant. Taxes were the same for each person: $73.40 for the US (Transportation tax, APHIS fee, Customs user fee, federal inspection fee, security fee) and $62 for Colombia (Airport + tourism taxes). The adult fares were $506, and the infant's was $33. Presumably that means the adult fares priced as $330 for the international legs + 176 for domestic, but I'm not sure how to check