Flying to Cancun from Moscow takes approximately 12 hours, plus the time for a layover in a transit airport, which can range from 2 to 12 hours. Typically, women come to Cancun for childbirth between the 28th and 32nd weeks of pregnancy.
When flying after the 30th week, you may be asked for a medical certificate at check-in, specifying the pregnancy term and confirming the absence of contraindications for the flight. Obtaining this certificate usually does not pose any problems.
In our practice, there have been cases where women arrived 1-2 weeks before delivery, but this is quite risky – you could give birth a day before the departure or even in the plane. Additionally, it is always better to adapt to the new climate, calmly choose a clinic, settle in, explore the area, and only then give birth.