For Halo depending on the distance traveling it could take several days or weeks to get from point a to point b from August 30th 2552 the last few days of the Fall of Reach when the Autumn fled from it, to September 19th 2552 so that would have been a month almost in slipspace. 

[url]http://halo.wikia.com/wiki/2552[/url] Just scroll down to August 30th, read it then go to September 19th.