Greetings!

UGH! You never want to have flat horizontal runs or 90 degree angles. That will be horrible to maintain, because you need a slight pitch to help the water drain. Something that level will get stuff clogged in it very quickly.

Do you need to put an S or P trap in there? A P trap might give you the right distance, and you can set it an enough of an angle to have it drain properly. Either that, or a 45 at the sink, a 45 at the waste pipe, and a straight run between the two. I think you are better off with a trap, though, unless there is one that you can clean / access at the sink itself.