Miami International Airport total freight volume increased by 8% year over year In the first quarter of 2022. Of the 687,675 tons handled, 552,371 tons came from international traffic which has grown 5.4% year to date, while domestic freight is up 20.5%. In 2021, MIA set a new annual record of 2.7 million tons of total freight and 2 million metric tonnes of international freight, strengthening its position as the busiest airport in the US and ninth in the world for international freight.