The campaign, which runs until July 3, covers expeditions in Norway and the Arctic for 2018 and Antarctica in 2018-19 on the operator’s G Expedition vessel.
The 20% price cut applies to an 11-day Norwegian fjords trip from Tromsø to Bergen now starting at £2,159pp.
Meanwhile a saving of 15% can be made on G’s Realm of the Polar Bear eight-day round trip to the Norwegian town of Longyearbyen available from £2,252pp.
Customers can also secure a discount of 10% on select cabin categories for the operator’s 11-day round trip to Ushuaia leading in from £3,999pp.
Brian Young, managing director said: “When sailing on G Expedition, travellers have the benefit of having plenty of shore time, with all excursions included in the cost of their trip. They’ll also see the unforgettable scenery from the comfort of both indoor and outdoor viewing spaces.
“The food is top-notch, and there is a team of expert expedition guides and ‘photographer-in-residence’ on board to provide greater learning opportunities.”