Pros
Love working at Delta! It's really nice when you tell people which airline you work for (because once you say you're a flight attendant that's always the next question!) and then have the response be: Omg, I love Delta! That's my favorite airline! I only fly Delta! Coworkers are awesome, lots of internal job opportunities, great bases and you can transfer (based on operational need, usually a 1 or 2 times a year the company awards lots of transfers) if you want to experience life in another city. Really get the sense that company leadership cares, and although it is a corporate company, I would describe my experience of the company culture as being more friendly and encouraging rather than a formal "cold" business like environment. I hope this helps! Overall, I've had a great experience and am proud to be a Delta employee.
Cons
These are not necessarily cons, but just things to be aware of: Delta does not have a flight attendant union. Do your research and if that is important to you, the other mainline airlines (UA, AA) are unionized. Opinions on this vary within the company, and while I've met many who are pro union, others are "proud to be union free". If considering Delta or another airline I would say to look at the bases and consider if it is important to you to live "in base" or if you would be ok either moving or commuting. Schedules are flexible, you will have 6 on call days a month rather than a full reserve schedule (very rare for a new hire, most if not all other airlines put new flight attendants on straight reserve) but keep in mind you will have these 6 on call days for years before you have enough seniority. Standards at Delta are very high. There is a reason so many ppl love flying on Delta-- but you will work hard during flights to keep customer satisfaction up and maintain that positive company brand. I have flight attendant friends who work for other airlines and sometimes I get the impression that I am working a lot harder than them for similar pay. Something to consider.