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Last day to earn up to 1,500 bonus miles with a mixture of Aeroplan travel partners.

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Last day AirTran Airways A+ Rewards members can earn credits for qualified stays at Priority Club Rewards hotels.

Last day Club Carlson members who complete a car rental of three days or longer with Avis or Budget can earn 9,000 points, enough for a free hotel night.

Last day to earn up to 105,000 American AAdvantage miles on nonstop roundtrip transatlantic first, business or full-fare coach flights on American Airlines, British Airways or Iberia. Registration is required at http://www.aa.com/offers using promotion code EUR11.

Last day to earn double points on all nights or free night certificate after four stays in Hilton HHonors hotels. Registration is required at http://wwwHHonors.com/FastWays

Last day Diners Club members in the U.S. can earn up to a 50 percent mileage bonus when transferring Club Rewards points to Delta SkyMiles. Visit http://www.clubrewardsus.com to learn more.

Last day to earn up to 150,000 United MileagePlus or Continental OnePass miles when flying roundtrip on United or Continental from the U.S. to London Heathrow in F, J, C or D booking codes. Registration required at http://insideflyerus.wpengine.com/link/?5544