The bonds will be convertible into new and/or existing ordinary registered shares in the firm said Tui in a note to the stock exchange on Friday (9 April).
It also has the option to increase the value of the issue to €400 million.
"Tui intends to use the proceeds from the offering to further improve its liquidity position as the Covid-19 crisis continues and subsequently for the repayment of existing financing instruments," Tui added.
