From SPG web site:
Frequent Flyer Program Exchange Ratio (Starpoints : Miles)
Aeroplan/Air Canada 1:1
Air Berlin 1:1
Air China Companion 1:1
Air New Zealand & Air Points 65:1
Alaska Airlines Mileage Plan 1:1
Alitalia MilleMiglia 1:1
All Nippon Airways (ANA) Mileage Club 1:1
American Airlines AAdvantage 1:1
Asia Miles 1:1
Asiana Airlines 1:1
British Airways Executive Club 1:1
China Southern Airlines’ Sky Pearl Club 1:1
Continental Airlines(R) OnePass 2:1
Delta Air Lines SkyMiles 1:1
El Al Israel Airlines No Transfer Option
Emirates Skywards 1:1
Flying Blue 1:1
Hawaiian Airlines 1:1
Iberia Plus No Transfer Option
Japan Airlines (JAL) Mileage Bank 1:1
King Club Miles 1:1
LAN LANPASS 1:2
Mexicana Frecuenta 1:1
Miles and More 1:1
Qatar Airways 1:1
Saudi Arabian Airlines Alfursan 1:1
Singapore Airlines KrisFlyer 1:1
Thai Airways International Royal Orchid Plus 1:1
US Airways Dividend Miles 1:1
United Mileage Plus 2:1
VARIG Smiles 2:1
Virgin Atlantic Flying Club 1:1
For each block of 20,000 Starpoints transferred, Starwood will award a bonus of 5,000 Starpoints. So, a 20,000 Starpoint transfer nets 25,000 air miles for a 1:1 ratio.
Most air miles programs run specials throughout the year where each transfer gets a bonus from the airline.
For discussions of air miles and points go to flyertalk.com.
http://www.flyertalk.com/forum/miles-points-1/ ... eom