Boeing Co. won an order for 100 jets from VietJet Aviation Joint Stock Co. valued at $11.3 billion in list prices as Vietnam’s only private airline expands fleet amid a surge in travel.VietJet signed the agreement today in Hanoi during President Barack Obama’s visit to Vietnam. Delivery of the Boeing 737 Max 200 planes will run for four years beginning in 2019 and will help the carrier expand its fleet to 200 by the end of 2023, the company said in a statement. The low-cost carrier, which started operations in December of 2011, is seeking to expand in a market that’s grown 20 percent annually in the last three years, according to the airline. At present, VietJet operates more than 250 flights a day with 50 routes in Vietnam and across the region to countries such as Thailand, Singapore, South Korea, Taiwan, China, Myanmar and Malaysia. “They seem to be extremely ambitious,” said Brendan Sobie, Singapore-based chief analyst at CAPA Centre for Aviation. “They have established themselves domestically with a strong brand and high share of the market in a very quick time.” Top Ten VietJet will probably surpass national carrier Vietnam Airlines as the nation’s biggest domestic carrier this year, according to CAPA Centre for Aviation. Vietnam is expected to rank among the world’s 10 fastest-growing aviation markets in the next two decades, according to the International Air Transport Association. The Boeing aircraft “will accommodate our strategy of growing VietJet’s coming international route network, including long-haul flights,” Chief Executive Officer Nguyen Thi Phuong Thao in a statement. The airline, known for its bikini-clad flight attendants, expects revenue to double this year from last year’s 10.9 trillion dong ($488 million) and to increase passenger capacity to 15 million after carrying 9.3 million in 2015. The carrier may come out with an initial public offering as early as the second quarter as it plans to build global routes and become a top budget airline in Asia, Thao said in an interview earlier this year. “Vietnam doesn’t have as many low-cost carriers as other markets—it was underserved while other markets were overserved,” CAPA Centre’s Sobie said. “They had the timing. They entered into the market as Vietnam’s economy was growing.”