Here's a coupon I received when Northwest Airlines was delayed due to heavy snow and arrived in Nagoya instead of Narita from New York! It's currently unusable, but would you like it for your collection? Amenity Coupon: 1,000 WorldPerks bonus miles or 1,000 Air France-KLM Flying Blue miles were offered, valid until October 31, 2007. Discount Travel E-Cert: A $25 discount on round-trip fares for Northwest Airlines, KLM Royal Dutch Airlines, and Continental Airlines. Reference code: PK081. Travel must be completed by October 31, 2007. Neither coupon has any cash value, is non-refundable, and only the original coupon is valid.