5
/10
Last day to book TripRewards hotel reservations to earn double miles, TripRewards points or rail points for up to four hotel stays completed by June 10, 2007.

/31
Last day to register for Delta SkyMiles partner promotion and earn up to 25,000 miles for participating in SkyMiles partner activities such as hotel stays, car rentals and shopping online.

Last day to register to earn up to 50,000 bonus miles in Northwest WorldPerks Perkology partner promotion. Earn 25,000 bonus miles when you apply and use or pay the annual fee for a new WorldPerks Visa Signature or Business card (20,000 miles for the WorldPerks Visa Platinum card) and earn additional bonus miles by completing qualifying partner activities.

Last day to fly roundtrip coach to Iceland from the U.S. on Icelandair for 25,000 Diners Club Club Rewards points (30,000 points from Minneapolis or Orlando). Normal point requirement is 50,000 points.

Last day to earn up to 45,000 SkyMiles for international travel between New York (JFK) and London (Gatwick) on Delta. Registration is required and members can earn 45,000 bonus miles for travel in BusinessElite fare classes and 25,000 bonus miles for full-fare coach or discounted BusinessElite travel.

Last day to earn 2,000 Hilton HHonors bonus points per stay and double airline miles at participating Hilton hotels in Europe, United Kingdom, Ireland, Middle East and Asia Pacific.