The Leeds-based company is adding additional flights to the Greek islands of Corfu, Kos and Rhodes.
People travelling from Manchester Airport will also be able to board additional flights to the Portuguese island Madeira.
The airline and package holiday business says it is responding to popular demand from holidaymakers.
Steve Heapy, CEO of Jet2.com and Jet2holidays said: “There has been a significant spike in demand to Corfu, Kos, Rhodes and Madeira and, as ever, we are the first to step in and meet that demand so that holidaymakers can travel to the places where they want to be.
"Customers are telling us loud and clear that they want to escape the gloom and enjoy a well-earned break, and we know these extra flights will book up very quickly.
“With great choice and value, not to mention our award-winning customer service and industry-leading response to recent events, customers know that they can trust us to look after them and deliver a fantastic experience so that they can enjoy a lovely holiday.”
-> These are the Jet2 destinations you can still fly to from Leeds Bradford AirportNew rules in place for Jet2 passengers
Passengers will be asked to access the Jet2 app, check-in online and download their boarding pass before arriving at the airport.
Although the airline is still allowing up to 10kg of hand luggage, they are asking customers to pack as light as possible.
Masks need to be worn by those aged six and over. These should be put on prior to entering the airport and kept on throughout the journey. However, face coverings such as scarves, snoods and balaclavas are not considered acceptable by Jet2.
Travellers can either drop bags off with a member of staff or use the one-touch self service kiosks.
Boarding is now being done in small groups when at the gate, in order to allow for social distancing. Customers are asked to scan their own boarding passes and then show their passports to the flight attendants.
On board the plane, food and duty-free items are still being sold, but customers are asked to use contactless payments wherever possible.
There won't be any hand sanitiser onboard any of Jet2’s planes, so passengers are encouraged to bring their own - but make sure it's less than 100ml.
Toilets will be open to use as normal, but passengers are being asked to wait safely in their seat until one is free to avoid queuing in the aisles.
All planes are cleaned daily and fogged with disinfectant spray, according to Jet2.