Discounts on tours to green list countries have been introduced by G Adventures.
Price cuts of up to 25% have been made by the adventure operator on over 90 tours, including to Portugal and Iceland, when booked before June 30.
Two new hiking adventures in Madeira and the Azores have been added.
The discounts also apply on trips to non-green list destinations such as the Canary Islands, Egypt, Jordan Costa Rica and the US.
More: Planeterra launches Global Community Tourism Network
G Adventures celebrates 100th trip since September
G Adventures managing director Brian Young said: “The reopening of UK borders poses a huge opportunity for the UK travel industry, with pent up travel demand at an all time high.
“While the green list remains limited at the moment, travellers are still hungry to lock their next adventure and we’ve launched this sale to help agents close bookings on some of our best summer tours, which are selling out fast.
“Plus, with our Book with Confidence offering an additional level of protection, travellers can feel confident booking knowing there’s flexibility to move their trip closer to departure if they need to.”
He added: “While travel may just be restarting here, G Adventures has been operating tours since September and has safely run over 100 trips, with amazing feedback from our travellers.
“As destinations open up, we’re excited to see our UK-based travellers joining these adventures and experiencing some of the great offerings we have both on our doorstep and further afield.”