I recently used the "name your price" tool on Priceline flights. When I began my search I entered the dates of 5/1-3/2015. No flights matched my bid so a box popped up with suggestions of how to modify my flight. Above the options for modifications it gave you an option to change your date so I changed my dates to 4/30/15 and 5/4/2015 so that I would be at my destination during the time frame I needed in case my bid landed me a redeye flight. I never checked the "flexible dates" box. I was given a redeye flight for my initial dates, exactly what I was avoiding. After speaking to Priceline management the only solution I am being offered it to pay $200 to cancel my flight. Apparently when you change your dates they do not honor it unless you start the entire search over.