1G will get you anywhere in the solar system fairly fast.
https://space.stackexchange.com/questions/840/how-fast-will-1g-get-you-there
To travel half the distance to the moon would take about 1.75 hours. The other half distance spent decelerating would take the same amount of time.
Using Days and AU (astronomical units) we can see 3 days will get about 2.5 AU (halfway to Jupiter). 4.5 days will get you 5 AU (halfway to Saturn). 9 days will get you 20 AU (more than halfway to the Kuiper belt)
I remember Kip’s exclamation in Have Spacesuit, Will Travel about some BEMs with a sustained 1G acceleration: “Those monsters have star travel!”