Indeed, arranging a holiday on KLM is cheaper than booking it separately. With bulk purchasing, flyers could secure a discount on airfare, and it could be more convenient too. However, to get affordable flights for KLM holidays, one has to look at the points below and read them.

Flyers have to book the flights earlier than their travel date.
They choose working days of the week to fly.
The flyer must be a Flying Blue member of an airline.

For further assistance or to get more information about the vacation packages, one can visit the official website of KLM or go through the above blog, which is mentioned by Group Travel Airlines.
Read more: https://www.grouptravelairlines.com/blog/klm-holidays-package-all-inclusive-vacations