Is it easy to find a job in industry in a different area? I am doing a PhD in the field of atmospheric chemistry at a good university in Canada. I feel I do not like my research very much and I am not very interested in teaching or doing research in my area.

But I will fulfill my PhD study and get a degree as an international student. In the meanwhile, I am learning or plan to learn a lot of online courses on coursera, especially in machine learning and data science.

I also think about quitting from PhD program and apply for a master/PhD in data science, CS, machine learning or something. But the investment would be huge and it may be not a good choice. I think maybe it is easier to get some courses online and certificates in a certain area like data science, and then I can convert to another area that I am more interested in in terms of future career building up. Also it is bad for my adviser if I quit from his group and I do not want to hurt anyone even if I am trying to seek for alternatives of my future.

My question is that is it easy to find a job in industry after I complete my PhD? Of course I will not find a job in my area but in data science.
Yes it is possible to find a job in a different area than your field. But you need to gain experience. In my point of view.. follow these steps..
1. Take courses of your interest. (Online or from institute)
2.Gain experience (Paid or unpaid internship)
3. Find a real job based on your experience.

I am electrical engineer and working as software engineer.