Yes you may do so, but it is not recommended because there is a risk that your maid may not be coming back after holidays and also she may claim that she has not taken the holidays later(if she cheats).
佢做左幾耐有幾多日假先?
option 1 - 最理想係扣除可享有既days of leave其他就no pay, air ticket要佢自己出.
option 2 - entitled days of leave + advance labour holidays,air ticket都係佢自己出.
option 3 - if she doesn't want to go bk n pay the ticket, then u pay her to stay at the agency n deduct the entitled days of leave + advance labour holidays.