Is this correct: I'm so sorry I can't come out tonight. I have to start to pack for

[B45]

Is this correct:

I'm so sorry I can't come out tonight. I have to start to pack for my trip back.

vs

I'm so sorry I can't come out tonight. I have to start to pack for my trip back to LA.

Are both acceptable if I'm in another country or state?

 

[emsr2d2]

Yes. The first, of course, assumes that the listener knows where "back" is. The second is clearer about where you're going to travel to.

I would use "I have to start packing ..." but "start to pack" isn't wrong.