Derek McInnes' side have won their first two Scottish Premiership games of the season against Kilmarnock and Motherwell, and growing optimism around the Granite City has led to an expected sell-out against the champions.
Former Celtic and Dundee United midfielder Flood thinks that would boost the home side's confidence.
"Having such a large support behind us does not put extra pressure on the players," he told RedTV.
"In fact it is a boost. Hopefully we can get the three points and make them go home happy.
"The fans have been brilliant. Even in the warm up at Motherwell, they gave the players a big boost.
"I know when we have tough times this season they will help us even more.
"We know, though, how much the game means to the fans and how much it would mean to them if we could get a win.
"We are going there with a lot of confidence and we know that we have a good chance of beating Celtic, but we definitely need to be on our 'A' game.
"If we play well we have a great chance of getting maybe a draw, maybe a win."
Flood is not surprised by Aberdeen's impressive start to the season which has confirmed, for many, their credentials as potential challengers for the league title.
The Irishman said: "We've have a good pre-season and the manager has worked us hard.
"He knows what way he wants us to play. We've had a good start but we're not taking anything for granted.
"In the dressing room it is another game with another three points up for grabs.
"We are going into games with confidence because we know with the attacking players we have, we can score goals. We have proved that in the first two games."
Flood does not expect Celtic's arduous trip to Kazakhstan after the game for the first leg of their Champions League play-off against Shakhter Karagandy on Tuesday to have an effect on how the Hoops approach the game.
He said: "Knowing Neil Lennon personally I know he will not have one eye on the European game.
"He will want to come up here and beat us."