Next summer, Delta will reinstate a daily Edinburgh-JFK service and double frequency on Heathrow-JFK to twice daily.

The Heathrow-Detroit daily flight will also be reinstated as will Dublin-Boston. Heathrow-Boston, which resumes on 10 September, will move from five a week to daily with the start of summer 2021 timetables.

Flights to Delta’s main Atlanta hub will see similar increases in frequency and reinstatements from March 2021. The Heathrow flight will move from daily this winter to twice daily and the daily Dublin service will resume. Heathrow-Minneapolis will also resume on a daily basis.

“While significant hurdles remain in the global fight against the pandemic, we are ready to connect customers to the people, places, opportunities and experiences they’re longing for,” said Joe Esposito, the airline’s senior vice president, network planning.

The airline warned specific restart dates “may vary” for previously suspended routes “due to travel restrictions and other operational requirements”.

Delta will retire its 18-strong Boeing 777 fleet by October this year, offering newer Airbus A350s and A330-900neos on transatlantic services as well as refurbished Boeing 767s.