How do I manage complex travel with lots of changes?

Booking one flight is a single clean task. Managing a complex trip that keeps shifting is a different animal, many pieces that all depend on each other, so one change ripples through the rest. Feeling overwhelmed by that is not a sign you are bad at this. It is the natural response to genuine complexity you have not yet built a system for. The overwhelm comes from holding the whole tangle in your head and trying to track every connection at once. No one can do that reliably. What complex travel needs is not a sharper memory but a written structure: everything laid out in order, so when one piece changes you can see exactly what it touches instead of guessing. Start keeping a simple itinerary document for complex trips, every segment and confirmation in sequence, in one place you trust. When something changes, you update one line and instantly see what it affects. The trip stops living in your anxious head and starts living on the page. Let the page carry the complexity so you do not have to.