Flacco led Baltimore on an impressive methodical first drive that gave the team a 7-0 lead in the middle of the first quarter.
Flacco made sure it ended with seven points by finding Torrey Smith over the middle for a 6-yard touchdown.
It appeared the drive might be halted when Jacoby Jones was ruled to have fumbled inside the Giants' 10. But the call was overturned on review, as Jones' knee was down before the ball came out.
Nice start for the Ravens, who have lost three straight. Let's see if it can continue.
Update: Flacco and Smith are the go-to connection early on at M&T Bank Stadium, as a 43-yard hook-up between the two set up the Ravens' second touchdown.
A three-and-out by the Giants set Baltimore up with the ball at the New York 47, and the Ravens quickly drove down for a score.
After a 3-yard run by Rice, Smith outdueled a Giants defensive back for a deep ball that gave Baltimore first-and-goal at the Giants' 1. Two plays later, Flacco leaned into the end zone for a 1-yard touchdown and a 14-0 lead.
Update II: After starting with a pair of three-and-outs, the Giants broke through on their third possession.
Eli Manning started by completing a 43-yard pass of his own, easily beating Cary Williams on his toss to Rueben Randle.
Manning followed with two passes for 16 yards to get the Giants in the red zone. Two plays later, David Wilson burst 14 yards through a gaping hole in the Ravens' defense for a touchdown that halved the home team's lead to 14-7.
Update III: The Ravens' offense is looking as good as it has in months right now, as Flacco just led the Ravens on another scoring drive.
But it ended with four points fewer than Baltimore thought it had on the board.
On first-and-goal from the New York 9, Flacco appeared to complete a pass to Jones, who had control of the ball as it was extended across the goal line. The ground jarred the ball loose, but the officials had originally ruled a touchdown.
Upon review, however, the call was overturned and ruled an incomplete pass because Jones hadn't completed a "second act" to officially control the ball.
Three snaps later, Justin Tucker drilled a 23-yard field goal to give Baltimore a 17-7 advantage in the second quarter.