For those looking for an extra discount on their UA trips, fatwallet.com will give you $2.50 back on every United itinerary you book. Simply click on their FW cashback link and then proceed to book the itinerary as usual. I've done this for about a year now and have had no issue getting $2.50 back on my trips. This is in addition to whatever perks you would normally get for paying with a UA MP Visa, etc. Quick and painless.