Traveling (abroad) for IVF??

For anyone who traveled for <a href="https://glowing.com/glow-fertility-program">IVF</a>, how exactly do you plan your flights around your period? My cycle is normally 27 days but can be anywhere from 22 to 29 days so how do I plan my flight and my stay there? Just hope my cycle comes right on time? How long were you in your location if you traveled? We are planning to be there for 2 weeks