Aug 8 (Reuters) - Delta Air said on Thursday it is pursuing legal claims against CrowdStrike and Microsoft after a global outage last month sparked by a faulty software update disrupted the travel plans of 1.3 million Delta passengers and cost the airline more than $500 million in damages.

"There is no basis -- none -- to suggest that Delta was in any way responsible for the faulty software that crashed systems around the world, including Delta’s," wrote lawyer David Boies, who is representing Delta, to CrowdStrike. He also rejected CrowdStrike's contention that the company's liability is capped at “single-digit millions."

(Reporting by David Shepardson; Editing by Leslie Adler)