The new flight programme came into effect on Sunday (8 November) and will provisionally run until 3 December, when the new measures designed to slow the spread of Covid-19 in England are due to be lifted.
Frequencies on various services operating from Heathrow have been reduced, while Virgin has suspended operations at Gatwick entirely.
It has also warned there could be further "ad hoc" changes to the lockdown schedule, including cancellations.
Virgin has temporarily suspended Montego Bay flights from 11 November to 23 November, when the route will resume as a twice-weekly service operating on Tuesdays and Fridays.
