Delta offers 500 miles on roundtrip tickets

Delta Air Lines is offering SkyMiles members 500 bonus miles when they purchase a roundtrip flight at delta.com between April 28 and May 31, 2009.

Northwest WorldPerks members also may earn 500 bonus miles when they purchase a qualifying flight at nwa.com.

“Delta.com’s share of tickets sold has grown by an unprecedented 50 percent since 2007. We’re bringing back the delta.com booking bonus for a limited time as a thank you to our customers for their loyalty,” said Josh Weiss, managing director of delta.com.

“We also invite customers who may book travel on other sites to visit delta.com and experience its many features and benefits, including Delta’s lowest available fares.”