Upper Crust owner SSP Group believes “demand for travel will come back” despite the coronavirus pandemic which is pushing sales down.
The firm said weekly sales are currently 76% below levels from April to September of last year.
SSP said about a third of its outlets, located mostly at train stations and airports, had reopened despite the pandemic.
It has reopened units “quickly” in response to improving demand, he said.
The group, which also owns the Caffè Ritazza chain and deli operator Camden Food Co, and operates in 35 countries around the world, said 1,100 of its outlets are now open.
Its managing director, Simon Smith, said: “We have seen some improvement in passenger demand since the start of the crisis and we have reopened units quickly and profitably in response to this, with over a third of our currently traded units.
“Our model is flexible and we will continue to align unit openings with demand, meeting the needs of our customers while tightly managing operating costs and cash flow.
“In the medium term, we expect to see the gradual return of passenger travel to more standardized levels,” he said.