Individuals input airline fares into the computers. Sometimes mistakes happen. Sign-up for some programs like Scott’s Cheap Flights. They will alert you of any error fares or great flight deals.
Last-minute flights can be costly, but you can use points and miles to buy a ticket. These miles can be worth anything from 1.2 cents to 1.5 cents a mile.
Try to mix and match different airlines if you notice that one airline has a cheaper flight to your destination while another will have a cheaper flight back.