United MileagePlus members can earn double miles on nonstop roundtrip Austrian Airlines flights from Newark (EWR) to Vienna (VIE) for travel between July 2, 2014 and Sept. 30, 2014.

MileagePlus members must register for the promotion before travel using the promotion code TB9M73 at http://insideflyerus.wpengine.com/link/?11567

This offer is only valid for travel on Austrian Airlines flights and is not valid on United marketed codeshare flights operated by other carriers. One-way trips, circle trips, multi-city itineraries and itineraries with stopovers do not qualify for this offer – the trip must be nonstop. The bonus can be earned an unlimited number of times during the promotion period.