I'm thinking that's the response you were looking for.
Maybe I'll compile a list for Wikipedia when I have time.
India is planned for 4th visit next year.
Last time I checked, there were very, very few catholics in these countries, unless these visits were for political purposes?
1. Apparently the very first modern official papal visit in history, by Paul VI, took place in 1964 and was to Israel. He went both to establish diplomatic ties with the newish country and visit the holy sites there.
2. Popes traveled to Constantinople in 523, 547, 680, and 710. Another was abducted and sent there for trial in 653. Not sure if that counts as a papal visit or not.
3. The visit to Constantinople in 523 by Pope John I was the first time a pope traveled outside of Rome willingly.
4. Pope Liberius (352-366) was exiled to a city in Thrace, very near to Turkey, though currently the city is within the territory of Greece.
5. Urban II (1088-1099) was the first pope to travel extensively outside of Rome, though the farthest he got was France. Later he'd call for the 1st Crusade. Maybe looking to open up new travel opportunities?
7. the older popes that visited Constantinople must not have crossed the Bosporus. and
8. All papal visits to Israel took place after 1964.
9. Pope John Paul II traveled more miles than all of his papal predecessors combined, and currently is still the most-traveled pope in history.
10. If all of the above is true and counted in the stats for this quiz then it appears my speculation was true and popes have not actually visited Turkey since its Islamification? Either that or the quiz may undercount the number of visits there. Or... those visits aren't counted as going to Turkey since Turkey did not exist at the time, and Constantinople was the capital of the Roman Empire.
(joke)... the truth is that travel, especially international travel, is for the most part something only modern humans do with anything approaching regularity; unless your occupation was that of a trader or sailor you generally stayed put and that seems to have been the rule for popes, as well.