As you will discover, once you get into this game of flying FSU women around the world

there are, as far as I can tell, really 4 types of travel restrictions that they will face...which most
americans and europeans do not need to deal with.
1. Where she does not need any kind of visa (places like Turkey, Egypt...)
2. Where she needs a stamp and this depends on the country she is from and where she is going
(like to Domincan Republic or Thailand, its usually a formality to pay your 20$ in the airport, no big deal
3. A Shengen or similar difficulty visa. This generally works best if you purchase a travel package from
a travel agent in the FSU country and that agent , for a fee, gets a Shengen Visa for her (usually 2 week duration)
4. The "impossible to get visa" such as USA, and a step down in difficulty might be Great Britain
You probably know all this. As for transit visas, you generally want to avoid them. They are unpredictable.
However, certain airports in the european union, NOT ALL, will not require any transit visa for her.
They are used to international travellers going from Terminal A to B and etc. Frankfurt and Paris are examples.
If not these airports, then you can contact the carrier to find out if she can avoid a visa. I found out the hard
way that Vienna was not an airport that allowed this....
And, unfortunately, the least expensive fares to the Carribean from Europe are on US carriers connecting
in the USA. There is NO WAY that she will be given a transit visa. In fact i dont even know if they are ever issued.
The US is just paranoid and tough as nails about this issue. Unlike Air France, you will find that calling an US based
airline will give you someone who is less familiar with this issue and may give you misinformation.
So, beyond the expense added to deal with this, you want to avoid traumatizing the girl if she ends up in some
limbo in the airport, especially as most of these women likely have never been on an airplane ride more than a
couple hours duration.