After both teams failed to score, the former Tottenham Hotspur manager claimed that the draw was the correct outcome.
"Credit to Blackburn," Redknapp told the club's official website. "Gary [Bowyer] did a good job in setting up his team and they made it difficult for us.
"They created a couple of good opportunities in the first half and I thought we were fortunate to come in all square.
"We created two great chances in the second half and, on another day, it probably would have gone in. But you're not always going to win them all."
The point leaves QPR second in the Championship.