How long will my withdrawal bleed last on the pill - going on hols and need some quick advice please.?

I'm taking the contraceptive pill for the first time in years and I can't remember how long the withdrawal bleed lasts for. It's my first pack of Yasmin. I'm due to finish it tomorrow (Tuesday), then start my bleed hopefully Thurs or Friday. I'm due to go on hols the following Tuesday and nobody likes a bleed in a bikini. Should I continue to the next pack or should I be finished before my flight?