You need to register and have at least three qualifying activities to earn a 50% bonus on all of your hotel and car partner earning through April 30th.

Regular readers know that I’m not a huge fan of Delta Skymiles. And it’s not the 150% bonus offer that Delta mistakenly offered in November, 2008.

But I am a fan of bonus miles.

This would, for instance, make a 2-day Avis car rental that would otherwise offer 2010 miles especially value (3015 miles!).

Mileage transfers count, so 20,000 Starwood points normally generate 25,000 Delta miles. If you’ve got two other qualifying partner transactions, then a 20,000 Starpoint transfer would yield 37,500 Delta miles.

This isn’t lucrative enough to actually get me to burn my Starwood points, they’re too value and Delta miles aren’t. But if you want to top off towards an award, now’s a great time.

Just remember that you need three transactions to qualify. Right now I’m headed over to my Starwood account, as a Platinum I am able to do a mileage transfer of as little as 1 mile. (I do this often to my lesser used mileage accounts in order to keep them active.) Boom, there’s a partner transaction. And if I come back in a week or so and do it again, that should be another transaction. Because on quick read of the rules it appears as though the same partner/activity can count more than once.