The new campaign means there are "tens of thousands" of extra free child places up for grabs from across ten UK bases this summer.
The offer is open to Jet2holidays booked through an independent travel agent returning on or before 31 August. Bookings must have at least two passengers paying the full adult price.
The campaign has been designed to further boost the holiday plans of UK holidaymakers this summer, after the last two years were impacted by the pandemic.
Steve Heapy, chief executive of Jet2.com and Jet2holidays, said the companies want their independent travel agency partners to "be at the heart of our summer plans" this year.
"This is our biggest ever giveaway of free child places and although there are thousands of places available, we know that they will be enormously popular with families and family groups looking to get away so people will need to act quick to secure one," he added.
