Upvote:1
As far as I know, some airlines permit a one-letter spelling correction (e.g. see http://www.flyertalk.com/forum/india-based-airlines/1510058-name-spelt-wrong.html - "Under the IATA rules applicable to Air India, a single-letter transposition should not be a problem" - although I could not find an actual IATA reference). However, you should contact the airline as soon as possible - do not wait until you get to the airport!