It might seem much cheaper to order your bridesmaids dresses and even your dress from the US for example but this could prove to be a false economy.
Obviously you have to take in consideration different sizes and overseas return policies. But in terms of saving money, make sure you understand what the exact shipping costs are and what VAT and Customs Duty you’ll have to pay.
It could turn out that even though the ticket price is 50% less then the UK equivalent you’ll actually end up paying more!