Depends on the company. If they don’t really care it’s more evidence/proof of expense than anything.
My last employer used some stupid Oracle system to audit the hell out of everything. One time I was flagged for taking a suboptimal route that increased toll expense by $3. Hilarious. I spent like 1.5 hours @ $90 on justification of $3.
Yeah, our automated system (Concur) does end up insisting on justifications for why you picked the 12 hour direct flight which is $100 more expensive than the three options with 2 stopovers and a total travel time in the 18-20 hour range (or sometimes even overnight stays in airports).
Feels like a lot of the goal in these systems is to try enforce rules that no person expense manager could try insist on with a straight face. If even 10% of the company gets scared off by the justification demand and books the inconvenient option, that's $20k/yr saved.
Which is still probably peanuts compared to what Concur costs, but that cost is somebody else's problem to the finance person who gets to claim savings on annual flight costs.
My last employer used some stupid Oracle system to audit the hell out of everything. One time I was flagged for taking a suboptimal route that increased toll expense by $3. Hilarious. I spent like 1.5 hours @ $90 on justification of $3.