* Boeing raises Indian overall aircraft order forecast to a record
* Boeing's estimate is for 20 years to 2037
* Single-aisle jets to account for most of India's jet orders (Adds India retains FAA Category 1 rating)
By Aditi Shah
NEW DELHI, Dec 19 (Reuters) - Airfares in the fast-growing Indian market are 10 to 15 percent lower than breakeven levels for airlines, a Boeing Co executive said, as the planemaker raised its long-term jet order forecast for the nation to a record despite market challenges.
Major Indian carriers Jet Airways, IndiGo and SpiceJet were all in the red in the September quarter as high oil prices, a weak rupee and intense price competition eroded their margins.
It is important for the sustainability of the sector that airlines show more discipline in pricing fares, Dinesh Keskar, senior vice president, Asia Pacific and India sales at Boeing Commercial Airplanes, said on Wednesday.
"Double-digit growth coupled with losses is what I am concerned about," he said. "I will forego 2 to 3 percent growth for making money rather than filling up my airplane at rock-bottom prices and never making money."
To date, however, the lack of profitability has not affected deliveries to Boeing clients, which include cash-strapped Jet Airways and budget carrier SpiceJet, Keskar said.
India's passenger traffic has risen at around 20 percent in recent years, making it one of the world's fastest-growing aviation markets. Boeing expects the country to become the third-largest commercial aviation market by the early 2020s.
Boeing sees Indian carriers ordering a record of up to 2,300 new planes worth $320 billion from global planemakers over the next 20 years to 2037, about 9.5 percent more than its previous prediction of 2,100 jets until 2036 made last year.
It said single-aisle planes, such as its 737 MAX, would account for 84 percent of global planemakers' new jet deliveries to India over the period, higher than the world average.
The forecast comes amid signs that pressure on the Indian airline sector, dominated by low-cost carriers, is starting to ease as oil prices fall and the rupee firms.
Kotak Institutional Equities last week said in a note to clients that there were signs the worst was over, with data showing flat fares in the third quarter ending Dec. 31, versus a 9-10 percent drop in the previous two quarters.
Carriers like Vistara, a joint venture between Singapore Airlines and India's Tata Sons, IndiGo and budget airline GoAir are also turning to the international market in search of better returns.
India has retained a Category 1 rating from the U.S. Federal Aviation Administration that means its airlines remain eligible to add new flights to the United States and codeshare with U.S. carriers, the Directorate General of Civil Aviation said on Tuesday evening.
Last year, India received a poor rating in an audit by the U.N.'s aviation body, sparking industry concerns that it could be downgraded to Category 2 alongside countries like Bangladesh and Thailand. (Reporting by Aditi Shah, writing by Jamie Freed; Editing by Himani Sarkar and Christopher Cushing)