EasyJet holidays is knocking up to £200 off packages booked via agents or direct.
Customers spending at least £800 will receive a £100 discount, while those spending at least £2,000 will get £200 off.
The sale lasts until 11pm on 16 September.
At the same time, the operator said it has made it easier for agents to search for holidays by adding more filters to its trade portal. Now agents can search specifically for adult-only, family and luxury holidays for the first time.
Also, agents now have the option to download quotes. Head of Trade Distribution Natasha Marson said:“We’re thrilled to be offering agents a promotion to give their customers even better value when booking a package holiday.
“The promo code can be applied on any holiday and can be combined with free kids places, giving holidaymakers even more reason to book with easyJet holidays.”