The offer is available to clients booking by February 29, with discounts available from the start of April to end of October.
Located in the heart of the Quinta do Lago estate, Monte da Quinta features a collection of 132 self-catering suites and a range of two- and three-bedroom townhouses and villas, all with private pools.
Guests choosing to stay in the resort's suites can do so for as long as they like, with a typical one-week break for two people at the height of summer costing from ?1,470, offering a saving of ?630.
Families booking for seven nights or more receive three complimentary half-day sessions in the kids' club, and, for those staying 14 nights, it doubles up to six sessions.
Free sessions are valid for one child aged three to 12 years old, with a second entitled to a 20% discount. Sessions must be requested at the time of booking.
For more information email mqreservas@mqclub.com or visit www.mqresort.com