The Miami-based chain said that global sales rose 2.4 per cent at established locations during the third quarter, including a 3.6 per cent increase in the US and Canada.
McDonald's previously reported a 3.3 per cent decline in the US for the same time, citing heightened competition as a factor.
Alex Macedo, Burger King's president of North American operation, said improving the speed of service at restaurants and focusing on fewer, "more impactful" new menu items is paying off.
The dish -- which consists of deep-fried pieces of chicken in the shape of french fries -- had been introduced in 2005 and taken off the menu in 2012.
The return of the Chicken Fries is among the many marketing pushes Burger King has made since investment firm 3G Capital took the chain public again in 2012.
Some efforts have flopped; the chain recently said this summer that most its franchisees would take its lower-calories "Satisfries" off the menu after less than a year.
This month, CEO Daniel Schwartz said it plans to open its first restaurant in India, featuring a primarily vegetarian menu. Burger King currently has nearly 14,000 locations globally.
The company also said this summer that it would acquire Tim Hortons for USD 11 billion and move its headquarters to Canada, where the chain known for its coffee and doughnuts is based.
The companies said Tim Horton would take advantage of Burger King's expertise in striking international franchise deals to expand its global presence.
Total revenue rose to USD 278.9 million, short of the USD 281.8 million Wall Street expected. Shares of Burger King fell 4 per cent to USD 31.
