When should I start laser hair removal to fit my travel schedule?

This year, I'm looking into laser hair removal to prepare in advance rather than rushing to get it done right before my vacation. However, I'm not sure how many months in advance I should start to meet my desired timing. I'm curious about the typical treatment intervals and whether it's okay to delay it by a week or two due to scheduling conflicts. I'd also like to know if the starting time is adjusted differently during seasons with a lot of outdoor activities, like summer. If you have experience with laser hair removal, please let me know when you started based on your travel or vacation schedule, and if there was a point where you felt it was a good idea to get it done early! I want to get laser hair removal done and go on a trip looking beautiful!