Contiki has also appointed a new sustainability officer, Tasha Hayes, in a bid to further support the transition to a low carbon future.
Hayes said now the company has achieved carbon neutrality, it "made sense to have a front person" for its sustainability initiatives.
"During my time with Contiki I’ve always championed sustainability and looked at ways we could do better both on the road and in the office," she added.
"Contiki becoming carbon neutral is massive, and it’s the perfect opportunity for me to support this direction, as someone who can oversee and monitor to make sure we stay on track to achieving the ambitious goals we have set out.”