Delta charges some of the highest change and cancellation fees among domestic airlines. Delta Air Lines also charges a $200 change fee for paid domestic flights (including to the U.S. Virgin Islands and Puerto Rico), and up to $450 for international flights.
Trouble is anything that causes difficulty, worry, and inconvenience, or that prevents you from doing something. If you have trouble getting along with a classmate, it is hard to be friendly with him or her. Whether you have trouble finding your shoes, you're in trouble with your teacher, or you go to a lot of trouble buying the kind of tea your sister likes, you face an annoying â and possibly distressing â difficulty.
problem. 1  any question or matter involving doubt, uncertainty, or difficulty. 2  a question proposed for solution or discussion. 3  Mathematics. a statement requiring a solution, usually by means of a mathematical operation or geometric construction. 4  difficult to train or guide; unruly: a problem child. 5  Literature.