What programs do you have points with?
Where are your cards issued? Each countries transfer partners differ as do the rates of transfer

For US cards:
Amex MR transfer to Aeroplan & Avianca both of which should be 50k miles plus $50-$100 USD in taxes & fees.
Chase UR transfer to UA which should be 50k miles plus about $20 in taxes
Citi TY transfer to AV, SQ, TG & BR but you'll have to do your own searches to find out the award chart and fees.