Thomson Airways says it's activating contingency plans to switch customers to other aircraft, in the absence of a delivery schedule from Dreamliner manufacturers, Boeing.
The holiday firm is contacting those affected to tell them they will be travelling on Thomson Airways 767 long haul aircraft.
The supplement paid for the 787 Dreamliner flight will be refunded to those customers who proceed with their original holiday bookings, and customers will also have the option to amend their holiday without incurring any amendment fees."
They added: "We understand how frustrating and disappointing this news will be for those customers looking forward to flying on the 787 Dreamliner, we are equally as disappointed that Boeing was not able to confirm a delivery date for us. Unfortunately these circumstances are out of our control."
More top news
The pup is being hailed for her unprecedented success while working with the UK Border Force after stopping £1 million in cash at Heathrow.
A wolf which escaped from an animal sanctuary after a fence blew down has been recaptured after five hours on the loose.
Thursday morning's forecast for the west of the region