For a pilot's travel expenses either to be excluded from the pilot's taxable income or to be claimed by the pilot as an itemized deduction, the pilot's expenses must be incurred while on a business trip that requires sleep or rest (an "overnight trip"). Expenses incurred on trips that are not overnight trips do not satisfy this requirement. For pilots, the expenses at issue are usually meal and incidental expenses, because the airline invariably pays for lodging directly or reimburses the pilot for it separately.