Some airlines offer deeply discounted last-minute fares on select flights, but your chances of landing one for a place you already plan to go are slim. They're mostly useful if you can make plans to go AFTER you already know that the cheap airfares are available. If you're thinking you might go if you can get a cheap airfare and can wait until the week before you plan to go, then go to the sites of the airlines that serve your origination point and sign up for the emails they send with these offers. If you definitely will be going and need to get a cheap airfare, you probably will be disappointed.