If you’ve been dreaming of visiting the United Kingdom and watching the changing of the guards at Buckingham Palace or checking out the lively Manchester music scene, American Airlines has an advantageous offer that is valid until the end of the year. When you fly roundtrip on American Airlines in first, business or select coach fares from the U.S. to the U.K. (London Heathrow or Manchester) between Sept. 18 and Dec. 31, 2008, you’ll receive a companion ticket that can be used on a future flight to the U.K. or Caribbean. The companion ticket can be used between Jan. 15, 2009 and Dec. 15, 2009. Registration is required before traveling using promotion code UKCMP. Make sure you are subscribed to receive email from American Airlines so you will receive your companion ticket. The offer is only open to residents of the Continental U.S. and Canada. Visit http://www.aa.com/offers for more information.