EasyJet boss Johan Lundgren believes there is significant "underlying demand" for domestic and international travel, despite the Covid crisis.
The carrier reports flight and holiday searches up more than 200% week-on-week amid news UK-wide Covid restrictions will be eased over Christmas.
Popular connections in December include travel to Belfast from London and Bristol, and flights between London and Edinburgh.
EasyJet also saw a spike in international bookings upon launching its Black Friday sale on Wednesday (25 November), with Faro, Palma, Alicante and Malaga all proving popular for spring and summer 2021.
Demand is also up for destinations in Turkey and the Canary Islands.