Latin America has adopted the unbundled fare faster than almost anywhere. Volaris, VivaAerobus, JetSMART, Flybondi and Arajet sell a base fare with a personal item only, and even the full service carriers, LATAM, Avianca and Copa, have a Light or Basic tier that drops the checked bag.Checked allowances on US routes are usually stated in pieces rather than weight, and the Caribbean island carriers add strict small aircraft limits on their domestic legs. Every figure here was read off the airline’s own site and dated.