There are a number of voucher type websites that offer holidays and breaks away, such as Wowcher, Living Social and Groupon. You can often save hundreds of pounds by booking a holiday through one of these companies but you do need to ensure that you know exactly what you are booking prior to doing so.
Often these sites are able to offer the holidays at a great discount because there are restrictions on the booking. These restrictions usually include, where you can fly from, times you can go and number of people who can purchase the holiday.
Although there are restrictions, if you can find a holiday that fits your criteria then you can save a small fortune. Do not be tempted to book a holiday without reading the full terms and conditions and if you have to pay in full at time of booking you may find you are not entitled to a full refund should you need to cancel or be charged for amendments to your booking.