A bigger plane means more seats for passengers. Japan Airlines has upsized its Guam service from a 767 aircraft to a 777. It means an increase in capacity by about 30 percent per flight, but perhaps more importantly a rise in confidence in the Guam route.

Japan Airlines made the switch to the larger aircraft starting this month says Assistant for Administration and Passenger Traffic Jason Mondina, in response to an increase in demand.

"From a 767 to a 777, we now have 113 more seats versus our 767, which had a capacity of 199. With this Boeing 777 we're now at a 312 capacity," Mondina said.

JAL had cut back service in recent years, and other carriers such as Delta and All Nippon Airways had pulled out altogether. Director of Administration Hajime Fujiwara says there has always been fluctuations, but lately they've seen signs of growth in the once-dominant Japan market.

"Currently, we are making an effort to bring some more customers from Japan," he added.

"I believe the demand has increased due to our relationship with our business partners in Japan our in Guam and the Guam Visitors Bureau, and travel agency, etc." Mondina said.

The airline also announced it opened a new section at the airport's Sagan Bisita lounge for business class passengers and different tier-status frequent fliers. Japan Airlines will celebrate its 50th anniversary of service to Guam next year.