The service, set to be officially announced on Tuesday morning along with the name of the airline, will include direct flights to Quebec City and Bonaventure, Que., said airport spokeswoman Colleen Kemp-Mitchell.
It will also offer connections to major centres throughout Quebec and Wabush, N.L., providing better service for New Brunswickers who commute to the small northern town for work, she said.
"The mining sector in Wabush is booming and so they did see extra capacity would be worthwhile," said Kemp-Mitchell.
"Currently workers going up to Wabush — it can take them up to three days — and this will be same-day connections."
The Saint John Airport will be the only New Brunswick airport with direct flights to Quebec City and Bonaventure and same-plane connection to Wabush, Kemp-Mitchell said.
The service expansion is the second announced in as many months. In May, airport officials announced Sunwing would offer two new destinations in 2013 — Cayo Santa Maria, Cuba, and Punta Cana, Dominican Republic.
The airport is also hoping to lure Porter Airlines, which is known for low fares, free snacks and flights to downtown Toronto.
In addition, officials want to woo a carrier that will fly into the United States. As it stands, the only U.S. service in New Brunswick is the Continental Airlines flight from the Moncton airport to Newark, N.J.