Four months after taking its first flight, Jetsgo announced plans Friday to double its fleet to six planes and add its first routes to the United States.

The airline said its fleet of three Boeing Super 80s would grow to six by the end of the year. The new planes would be used to expand Jetsgo's Canadian routes to include service to Timmins, Ontario; Saguenay, Quebec; and Charlottetown.

Jetsgo is also taking its first cross-border steps, with plans to fly to Newark, New Jersey (to service New York City) from Toronto starting Jan. 9. Flights to Fort Lauderdale, Florida from Toronto and Montreal will begin Dec. 21.

"Jetsgo will be the only discount airline available to Canadians in our new markets of Charlottetown, Timmins, Saguenay and New York," Jetsgo CEO Michel Leblanc said in a release.

"Competition in these markets should see fares drop by as much as 50 per cent over the coming months," he said.

The airline said it would add another 75 staff, boosting its payroll to 300.