The airlines want to be understanding during wartime. For flyers whose travel plans have been disrupted by the war or who are simply too apprehensive to fly right now, all the major carriers are advertising relaxed restrictions on their nonrefundable tickets. They will allow customers to rebook their flights without incurring the typical $100 change fee.
Sounds good, but watch out for the hidden catches. On most carriers, you have to reschedule your flight by no later than your original date of travel. Which means if you need to cancel that flight to Miami this week but don't know yet...