I certainly am not a season traveler so not knowing when I had to cancel my dec. flight to visit my daughter.at a cost of 90+ dollars leaving a balance of 460+ dollars toward another flight that booking a flight for 320 dollars would leave me still owning $177. I didn't take anything in High school higher than geometry but I do know that if you have 460+dollars supposedly toward a flight at a later date that cost $320 you shouldn't have to pay $177 more dollars. I'm 76 year old and have driven 556mile to my daughters 4 times a year for 18 years and looks like i will have to drive as long as I can. Thanks a lot!!!