Airport Ground Staff applicants have rated the interview process at Delta Air Lines with 3 out of 5 (where 5 is the highest level of difficulty) and assessed their interview experience as 100% positive. To compare, the company-average is 73.8% positive. This is according to Glassdoor user ratings.
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I have applied Delta Air Line airport ground staff by email. And I received the result a couple weeks later by email. Unfortunately I was not accepted in the first round.