Many airlines have already suspended a number of their commercial services, and for services that are still operating, the majority of passengers are simply not turning up to travel.
Mae nifer o gwmnïau hedfan eisoes wedi atal nifer o'u gwasanaethau masnachol, ac ar gyfer y gwasanaethau sy’n parhau i weithredu, nid yw’r mwyafrif o deithwyr am deithio.