预支差旅费Prepaid travel expenses也可以说:Travel AdvancesTravel advances are funds or loans given to a traveler prior to the trip for meals and other miscellaneous expenses incurred while traveling on a business trip.
具体看语境,比如说:Afraid so. We used to have cash advances, but the company stopped that when they started issuing cards.恐怕是。我们以前是预支差旅费,但自从公司使用信用卡后,就停止了。句式也可以说:prepaid expenses/ prepaid travel expenses预支费用