What is the flying cheat for Grand Theft Auto 4 on PS3?

What do you mean flying? If you mean the helecopter, dial: "3595550100" on the cell phone. The helecopter is armed with rockets. Note: This phone number translates to "FLY-555-0100". This code prevents the "One Man Army" and "Walk Free" achievements from being earned.

if you are looking for the flying cheat like flying cars there isn't any the game sucks there is only cheats for cars helicopters loose wanted ect.. for more go on gamewinners.com