[Tdol]

If you are looking at online courses, take great care and check the sites thoroughly, especially when they talk about their accreditation and recognition. Many have set up an accrediting body of their own, so they self-accredit. There are some reasonable courses online, but most are to be avoided. I think that I'm With Stupid's suggestions are the two best and most widely recognised courses. You can show a CELTA everywhere and they'll know it. The same cannot be said of many of the online courses. Also, courses with a teaching component will stand you in better stead for the initial shock at walking into the classroom than only doing coursework.