You might be able to catch a flight to Hawaii out of Stockton Metro Airport starting in mid-2012.It is one of several scenarios Allegiant Airlines is working with the airport on to expand service out of Stockton. Another includes providing the first direct connection from Stockton Metro to a hub airport - Denver.The possible additional destinations that could be wedded with current flights to Las Vegas and Palm Springs reflects the growing use of Stockton Metro not just by Northern San Joaquin Valley residents but also Bay Area and Sacramento area residents as well, according to Stockton Airport Commission member Jack Snyder.The former Manteca mayor with 26 years of council service under his belt has served for the past two years as the city’s representative on the county airport commission.The airline is pondering an Atlanta to Hawaii flight that would have to refuel before departing the West Coast. Stockton is a strong candidate given the congestion at the three major Bay Area airports - San Francisco, Oakland, and San Jose - as well as Sacramento International.