Originally Posted by
MSPeconomist
Start by reading your employer's travel policy very carefully. Is use of a preferred provider encouraged or required? Do you pick your flights and hotels? Are you allowed to pay more for nonstop flights, which are likely to be US? For foreign travel, are USA carriers ever required and how are codeshares treated for such rules?
There is no preferred provider for flights or hotels.
We are expected to use our best judgement and choose the most economical option that meets our needs.
So there is flexibility in what that means.
If a nonstop is only slightly more expensive and it's more convenient, booking it isn't a problem.