I am sick of flights that are "preassembled" (I don't know the right word) by aggregators. I am willing to pay a bit more to buy one ticket and not need to recheck my bags at every stop. Further, I would like to be able to build in a fun day with a long layover in BKK. Are there any sites or services that let you choose all the legs and then buy it as a complete ticket?
TLDR : Answer Summary
The post discusses frustrations with fragmented flight bookings and seeks advice on how to book multi-city flights that allow for an enjoyable layover without the hassle of rechecking bags. Various commenters suggest using services like Google Flights, Kayak, and Skyscanner for booking direct with airlines, particularly those that allow for multi-city options or have codeshare agreements. It is emphasized that booking directly with one airline and ensuring all legs are part of the same ticket can avoid rechecking luggage and enhance travel convenience.