** Shares of India's IndiGo INGL.NS down roughly 2% at 4,535.10 rupees
** IndiGo faces a tougher domestic environment in the fourth quarter, with overall traffic growth slowing sharply as fleet expansion is constrained by new Flight Duty Time Limitation norms, says brokerage Elara Capital
** Elara expects the airline carrier to report a quarterly profit slump due to forex loss of ~40 billion rupees ($431.99 million) and higher costs, which could be partly offset by higher airfares
** Adds that IndiGo's international airfares were likely up 24% sequentially in the quarter, offsetting a 4% Q/Q fall in domestic airfares
** IndiGo expected to operate at ~88% passenger load factor in Q4, outperforming industry averages amid capacity discipline- Elara
** Analysts have a "buy" rating on avg; median PT is 5,490 rupees - data compiled by LSEG
** YTD, IndiGo shares down 11%
($1 = 92.5950 Indian rupees)
(Reporting by Urvi Dugar in Bengaluru)
((UrviManoj.Dugar@thomsonreuters.com;))