The carrier last month resumed after five years the world's longest commercial flight, an almost 19-hour non-stop journey from Singapore to New York.
The airline ordered seven new ultra-long-range twin-engine Airbus SE
It represents a major expansion in the U.S. market for Singapore Airlines and a test of whether the carrier can charge the 20 percent price premium that travel industry data shows is typical for ultra-long non-stop services due to their popularity with time-sensitive business travelers.
Singapore Airlines Executive Vice President Commercial Mak Swee Wah said there was existing demand for business class which he expected would continue to pick up.
For premium economy, however, he said some markets were not "entirely familiar" with the product, which offers more leg room and other amenities than economy class.
"I think we need to continue to stimulate and encourage the market to consider this product, initially with very attractive pricing, but eventually I think people will see that even at prices which we offer it is a good product to purchase because it is a very long flight," he said at an analyst and media briefing.
His comments came after Singapore Airlines reported on Tuesday an 81 percent plunge in second-quarter net profit, hurt by higher fuel prices, lower airfares and non-cash losses at its part-owned Virgin Australia Holdings Ltd
Yields, a proxy for ticket prices, fell 2.2 percent in the second quarter compared with a year earlier, failing to help offset the impact of a 24 percent rise in fuel prices.
Singapore Airlines is offering premium economy fares as low as S$1,698 ($1,230.17) return from Singapore to New York for weekday travel over part of the peak Christmas travel period, according to its website.
That is in line with economy class fares from premium rivals like Hong Kong's Cathay Pacific Airways Ltd <0293.HK> and Dubai-based Emirates that require a stop and a longer travel time, according to a Reuters search on Expedia.
When it previously flew to New York and Los Angeles non-stop on four-engined A340-500 jets that used more fuel, it had initially offered both "executive economy" and business class but later switched to all business class. Those flights were abandoned in 2013 when high fuel prices made them uneconomic.
A Singapore Airlines spokesman said on Thursday that the airline constantly reviewed its cabin configurations.
"However at this point we are confident we have the right balance with business class and premium economy class seating on our A350-900ULRs, and there are no plans to change it," he said. - Reuters