[jirisykora83]

I think it´s because most of the UX is designed a long time ago. The pricing wasn't too dynamic and search engines/airlines were more focused on business travelers (from which they have more money) and they usually don´t care too much, how much it cost and when they must / want to fly.

We are building our search engine (focus on EU low-cost mainly) which allow what you looking for (even if you want to search this) for example: A -> B [stay 2-6] -> C [stay 10-12] -> A