Originally Posted by
igotjays22
Luckily my employer will never know because I get reimbursed for travel well in advance :-)
Regardless of when you get reimbursed, this is almost certainly considered fraud - submitting/expensing a flight you are no longer taking. Also 110% unethical. Some employers might be nice and give you a warning on a first offense - many will consider this a firing event without a warning.
also, people can often figure out things you might not think they would know, especially when you’re blinded by trying to pull a fast one. Different strokes for different folks, of course, but personally Id advise that unless you are self-employed, it’s probably a good idea to straighten this out with your employer.
Originally Posted by
jsloan
I
believe that requires a reissue, but I suspect that I'll be quickly corrected if that's not true.

So, that would be a no. However, given the circumstances for the OP, I suspect the outbound leg
has already been flown.
pretty sure canceling a segment like that requires a re-issue.
Depending on the rules of the OPs ticket, there may also be a fare difference - while many especially domestic fares are one way, so it wouldn’t, there are still some that aren’t. If the latter is the case, you’d need to pay a fare difference to the one way fare. This might be a minor expense, or might not. YMMV.