I might be interested in some of your miles.
How would this work? Can you transfer the miles or something, or would you send a redeemable voucher?
How many miles counts for, say, a round trip, domestic US flight?
Typically, for a round trip saver award ticket, you will need 25K miles. This applies to domestic flights within the 48 contiguous U.S. states. For flights ex-U.S. gateway airports bound for Canada, Alaska, Hawaii, Caribbean destinations, Mexico etc you would be looking at 30 to 35K miles. Higher mileage figures apply for flights to South America and of course for destinations across both the Atlantic and Pacific. This is for economy class. Gateway airports are, typically, ORD SFO JFK DFW EWR SFO BOS and a few more.
If flying business and first class, expect to use more miles.