The first customer sailing onboard Tui Skyla will now take place on 28 June, while Tui Maya will cruise for the first time on 2 July with both ships operating from Budapest.
A Tui spokesperson confirmed that “due to the ongoing uncertainty around travel restrictions”, the decision had been taken to "temporarily reduce our river cruise fleet" with its third ship, Tui Isla, not operating this summer.
“We have contacted all customers impacted to discuss their options,” the spokesperson added.
Tui said it was also contacting all river customers affected by the latest cancellations “to discuss a range of flexible options”.