Travellers can also benefit from free changes on existing and newly booked cruises due to sail between 2 August and 25 October, affordable testing and vaccinated-only customers onboard.
Tui said it was also working with test provider Chronomics to create "affordable, cruise specific" testing packages.
Chris Hackney, Tui River Cruises’ managing director, said: "We are so confident people will love sailing with us, if for any reason we do not fulfil our promise to deliver a fantastic holiday, and a customer is genuinely not satisfied, we’ll give them their money back.
