I surprised no one has mentioned flying Iceland Air with Alaska Airlines miles? Couch is 50,000 miles or include a trip to Europe with a stopover in Iceland for 55,000 miles.
http://www.alaskaair.com/content/mil...e.aspx#iceland
Keep in mind its common to see 40,000 mile signup bonuses on the BOA Alaska Airlines credit card.
Downside is if your DFW based you would need to get to DEN/SEA/IAD/Orlando/MSP or another Iceland Air departure airport. If AS flies to DFW most likely you would need to route back to SEA on AS then onwards.