[Brilliant]

3 hours. Remember these are North Koreans. They probably sent it the long way around the world. And they are going slow to save gas.

[A Formerly Proud Canadian]

Ah, don't be ridiculous! They sent it around the sun, so it would have even more momentum when it hit Los Angeles. Remember, in 2014, they sent a 17 year old to the sun in only four hours! They've improved the technology so it only took 3 hours return for the nuke ;-) .