American Airlines is launching twice-daily non-stop service between Chicago and Portland, Oregon on 12 June 2013. To celebrate they’ve loaded a bonus miles promotion into the system offering double miles (100% bonus over the base earning) for coach tickets and triple miles (200% bonus over base earning) for first class tickets. The promotion is valid through 15 September 2013 and registration is required.
The fares for the route are not at all spectacular (it is peak summer season, after all) so don’t expect to do great to/from Chicago but the promotion appears to be valid on the ORD-PDX segments for through fares, too. There might be some better fares with the connection available which bring it back into the realm of a decent mileage run.