American AAdvantage members can save up to 50 percent on award flights between San Francisco or Vancouver and Tokyo Haneda for travel through Feb. 29, 2012.

You can book a roundtrip business class award for 50,000 miles (normally 100,000 miles) or a roundtrip award in coach for 30,000 miles (normally 50,000 miles). The offer is only valid on nonstop travel on Japan Airlines between San Francisco and Tokyo. Partner flight awards cannot be booked online and you will need to call American Airlines reservations at (800) 882-8880 to make the booking, and pay the $25 service fee. For more information, visit http://insideflyerus.wpengine.com/link/?5485 for San Francisco and http://insideflyerus.wpengine.com/link/?5487 for Vancouver.

Bottom line: Award discounts of 50 percent off don’t happen very often and if you have the miles, you can fly to Tokyo in business class for the price of coach. Award flights are, as always, subject to capacity controls so book soon.