Its all dependant on the time of day and crowd levels. If you try that during the 2 o'clock parade it will take forever as you'll need to cross the parade route.
Depends on the speed you walk at, how much of a crowd you encounter that impedes your travel, and if you stop to grab a churro or other snack on your way.
Orrr... If you can catch her, Tink can shake some fairy dust on you and the flight will only take....