Just got a new piece of mail one came to myself and my husband. This request says 2 400 dollar round trip flights with a 69 annual fee. I am thinking about the for our flight next June. Has anyone done this in the past? If so how soon can I cancel the credit card after we pay the annual fee and nit lose our flight bonus. Plus if we both apply and just do single accounts would I be able to use all four flights on one reservation. My husband thinks there will be a big catch.