COPILOT: <Gibberish>Shortie wrote:LANDO : (desperately) Yes! I said closer! Move as close as you can and engage those Star Destroyers at point- blank range.
ACKBAR : At that close range, we won't last long against those Star Destroyers.
LANDO : We'll last longer then we will against that Death Star...and we might just take a few of them with us.
LANDO: You've got to get some kind of reading on that thing up or down.
COPILOT: <Gibberish>
LANDO: How can they be jamming us if they don't know... if we're coming. Break off the attack. The shield is still up.
PILOT: I get no reading. Are you sure?
LANDO: Pull up, all craft pull up!
They were already at the Death Star in that scene (so close that I seem to recall the novelization mentioning that some of the fighters were disintigrated by the shield when they weren't able to pull up in time) and that was only fifty seconds after they came out of hyperspace. After that they were forced to fall back to a position further away from the Death Star, but that doesn't change the fact that they managed to reach it less than a minute after dropping out of hyperspace.