The two companies have been working together since the hotel opened in 2009, offering holidaymakers the chance to upgrade their room, pre-book a buffet breakfast or opt for Champagne on arrival when they make their booking.
The operator's commercial revenue manager, Christian Warrell, said: "We're delighted to have secured this extended deal with the Courtyard by Marriott. It means our customers will continue to benefit from this well-priced, quality hotel which is within close proximity of the South terminal."
Meanwhile, the company reports that it has seen "huge growth" in the number of bookings made through some of its long-term partners last month.
As examples, bookings with Page and Moy increased by 227% year-on-year, lastminute.com has seen increased partner sales of 44%, bookings through British Airways have risen by 14% in January compared to last year and sales through budget airline Flybe have grown by 60% on last year's figures.