|Image by Japan Airlines|
Japan Airlines (JAL) has announced a double mile promotion for Jetstar Japan (GK) between April 1 and May 31 2014 (flight date). However, pre-registration before flights are required. Also, only the more expensive Plus and Max fares are eligible for this campaign as the cheapest Starter fare isn't even eligible for JAL Mileage Bank (JMB) miles. For more details, you can refer to JAL website (Japanese, English).