Family Travel

My family of 4 adults and 1 child is considering a trip to Bombay India next year. I am looking for ways to cut expenses and have started to look into these credit cards that offer frequent flyer miles. Could you please explain exactly how this works? Do we just buy our tickets the regular way or do we have to fly standby? What kind of restrictions do they put on you? Is this really a good way to save money on airline tickets? Any suggestions and advice will be appreciated.
Thanks in advance,


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