Jorgie Porter, Jennifer Ellison and Andy Whyment, who are all based in the North of England, were forced to find alternative transport to London after their trains were disrupted due to cold weather.
The Dancing on Ice stars will perform as a group for the first time on Sunday and need to practise their joint routine.
They will skate after Torvill and Dean and the professional skaters, and will be joined by former X Factor contestants One Direction performing 'What Makes You Beautiful'
"If they miss rehearsals, they will have to just wing it on the night," a show insider told The Sun.
Emmerdale star Matthew Wolfenden, who lives in Halifax, was already in London due to promotional commitments.
Dancing on Ice star Charlene Tilton recently admitted that she has considered quitting the show every day due to the fear of injuries.