At Yandex.Travel there is a 10% discount when booking from 6 nights with almost no limit on the maximum amount.

To get the discount, use the promo code.

Terms of application:
— when booking from 6 nights
— Maximum discount amount is 50,000 rubles.
— Valid on August 14 and 15.
— Once per account (but you know how to get around it 😎)