iDine provides lots of bonus offers specific to airlines. You must be a iDine member for that airline to receive notice of the offer. I am a member of more US airline frequent flyer programs than I have credit cards, and so do not receive all of the notices of bonuses. I would like to know which offer is best at any one time, but I do not enough time in my life to read all of the airline forums to find iDine deals. An iDine forum would be most useful.
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Free Frequent Flyer Miles