Answer
As a business standard, it is generally advisable to allow 1 travel day for domestic and 2 travel days for international on the front end of business travel, while allowing 1 travel day on the back end for both domestic and international travel. However, it may be deemed reasonable by the unit to adjust the amount of travel days if the traveler provides a business justification with the reasoning for the adjustment and the unit approves the business justification in advance of the trip. This documentation should be stored with other travel related documentation in the Spend Authorization (or associated Expense Report) for audit/compliance review.