Although not a phone directory per se, Delta's official website does offer a webpage with a list of phone numbers that customers can use for their different traveling needs. These include phone numbers for website and mobile support, domestic reservation sales, international reservation sales, customer care and refund status check.
Delta.com also provides links to the website in other languages, such as Spanish, Portuguese and German. These web pages provide the same list of phone numbers in the language chosen. Another page lists worldwide phone numbers by country. Other ways to contact Delta Airlines include: email, Twitter and live chat through its website.