The order will specify the mode of transportation authorized for travel to and from the duty station. When mode of transportation is "government transportation directed" and not used, it will not be reimbursed for travel.
If the member elects to use POV/POC to travel to and from the duty location, it must be authorized in the order as more advantageous to the government. When travel is by POV, and not more advantageous to government, reimbursement will be limited to the constructive cost of travel. Keep in mind that although the cost of the travel itself (mileage compared to air fare) might be less expensive, the cost of additional days of pay and benefits needed to drive vs fly are also considered. Generally if the trip is more than 400 miles, the orders will authorize air travel and not driving.
IRs are required to procure tickets from a government Contracted Travel Office (CTO). Members should use the CTO that services their unit of assignment. Be sure to tell them you’re a Reservist; that allows you to make reservations without approved orders. You will need to provide the CTO a copy of the approved orders at least 3 days prior to travel.
If you need help finding a phone number for your unit of assignment's CTO, you can look
HERE.
NOTE: Exception is when traveling VOCO or the member did not have an opportunity to contact one of the 24-hour CTOs. In this situation, a ticket may be purchased directly from the airline, asking for the city pair or government rate, whichever is lower, and paid for with a Government Travel Card (GTC). Be aware that reimbursement will be dependent upon full justification regarding the emergency nature of the travel and why purchase through a CTO was impossible. Reimbursement is limited to the cost of the ticket or the price of the government would have paid, whichever is less.