I am a strong supporter of redeeming your Avios points on airberlin. I have flown them twice from New York to Berlin one-way this year in Business Class, for a grand total of £1 in taxes (plus 40,000 Avios). You can check out my reviews here and here.
They also offer an extremely cheap way of getting to the Middle East, since their Berlin to Abu Dhabi route is a touch under 3,000 miles and thus falls into the ‘50,000 Avios return for Business Class’ category (plus £51 of tax!).
airberlin has just announced upgraded schedules to the United States for Summer 2014:
Berlin to New York JFK will increase from 7 to 10 flights per week
Dusseldorf to New York JFK will remain at 10 flights per week
Berlin to Chicago wil increase to 7 flights per week
airberlin flies to five US cities in total – New York, Chicago, Miami, Fort Myers and Los Angeles.
Details of how to redeeem Avios on airberlin can be found in my Avios Redemption University article here.