India, May 15 -- Low-cost airlines, the pioneers of brief discomfort at bargain prices, have struggled to master long-haul flights. Now one of the world's most successful budget carriers is considering cut-price business class seats as a way into the Europe-Asia market.

India's IndiGo, which currently flies as far as Istanbul, is mapping out an ambitious long-distance network. The airline aims to start one-stop trips further into Europe within six months, Chief Executive Officer Ronojoy Dutta said in an interview in New Delhi last week.

IndiGo has captured almost half the Indian market in just over a decade by offering cheap, punctual flights -- and charging extra for almost anything else. Dutta's long-haul plans are forcing a product o...